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MPLS router is sending packets with wrong tag
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05-23-2016 10:58 AM
Hello,
I am setting up MPLS LAB with 3xP routers and 3xPE. When I am sending the traffic from one P router to Lopback interface of the PE router P router is tagging a wrong label. (OSPF is used as internal IGP)
See the picture.
Configuration follows:
R20 (P router - CISCO892W)
R6 (P router - CISCO892W)
R13 (P router - CISCO892F)
R11 (PE router - CISCO2811)
Here is the MPLS forwarding info for above routers
----------------------------
R20#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
21 Pop Label 1.0.0.6/32 0 Vl6 10.1.6.6
22 19 1.0.0.11/32 0 Vl20 10.1.20.13
23 Pop Label 1.0.0.13/32 0 Vl20 10.1.20.13
24 Pop Label 10.1.13.0/24 0 Vl6 10.1.6.6
Pop Label 10.1.13.0/24 0 Vl20 10.1.20.13
25 Pop Label 10.2.11.0/24 0 Vl20 10.1.20.13
------------------------------
R6#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
26 19 1.0.0.11/32 0 Vl13 10.1.13.13
27 Pop Label 1.0.0.13/32 0 Vl13 10.1.13.13
28 Pop Label 1.0.0.20/32 0 Vl6 10.1.6.20
29 Pop Label 10.1.20.0/24 0 Vl6 10.1.6.20
Pop Label 10.1.20.0/24 0 Vl13 10.1.13.13
30 Pop Label 10.2.11.0/24 0 Vl13 10.1.13.13
-----------------------------------
R13# sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 Pop Label 1.0.0.20/32 0 Vl20 10.1.20.20
17 Pop Label 10.1.6.0/24 0 Vl13 10.1.13.6
Pop Label 10.1.6.0/24 0 Vl20 10.1.20.20
18 Pop Label 1.0.0.6/32 0 Vl13 10.1.13.6
19 Pop Label 1.0.0.11/32 0 Vl11 10.2.11.11
------------------------------------
R11#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 16 1.0.0.20/32 0 Fa0/0.5 10.2.11.13
17 Pop tag 1.0.0.13/32 0 Fa0/0.5 10.2.11.13
18 18 1.0.0.6/32 0 Fa0/0.5 10.2.11.13
19 17 10.1.6.0/24 0 Fa0/0.5 10.2.11.13
20 Pop tag 10.1.13.0/24 0 Fa0/0.5 10.2.11.13
21 Pop tag 10.1.20.0/24 0 Fa0/0.5 10.2.11.13
_________________________
Here is the routing information
R20#
R20#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 4 subnets
O 1.0.0.6 [110/2] via 10.1.6.6, 02:23:09, Vlan6
O 1.0.0.11 [110/3] via 10.1.20.13, 01:54:04, Vlan20
O 1.0.0.13 [110/2] via 10.1.20.13, 02:23:19, Vlan20
C 1.0.0.20 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.1.6.0/24 is directly connected, Vlan6
L 10.1.6.20/32 is directly connected, Vlan6
O 10.1.13.0/24 [110/2] via 10.1.20.13, 01:58:39, Vlan20
[110/2] via 10.1.6.6, 01:58:39, Vlan6
C 10.1.20.0/24 is directly connected, Vlan20
L 10.1.20.20/32 is directly connected, Vlan20
O 10.2.11.0/24 [110/2] via 10.1.20.13, 02:03:51, Vlan20
192.168.150.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.150.0/24 is directly connected, Vlan150
L 192.168.150.20/32 is directly connected, Vlan150
-------------------------------------------------------------------
R6#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 4 subnets
C 1.0.0.6 is directly connected, Loopback0
O 1.0.0.11 [110/3] via 10.1.13.13, 01:54:59, Vlan13
O 1.0.0.13 [110/2] via 10.1.13.13, 01:59:35, Vlan13
O 1.0.0.20 [110/2] via 10.1.6.20, 02:24:05, Vlan6
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.1.6.0/24 is directly connected, Vlan6
L 10.1.6.6/32 is directly connected, Vlan6
C 10.1.13.0/24 is directly connected, Vlan13
L 10.1.13.6/32 is directly connected, Vlan13
O 10.1.20.0/24 [110/2] via 10.1.13.13, 01:59:35, Vlan13
[110/2] via 10.1.6.20, 02:04:36, Vlan6
O 10.2.11.0/24 [110/2] via 10.1.13.13, 01:59:35, Vlan13
192.168.150.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.150.0/24 is directly connected, Vlan150
L 192.168.150.6/32 is directly connected, Vlan150
R6#
------------------------------------------------
R13#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 4 subnets
O 1.0.0.6 [110/2] via 10.1.13.6, 01:58:00, Vlan13
O 1.0.0.11 [110/2] via 10.2.11.11, 01:53:25, Vlan11
C 1.0.0.13 is directly connected, Loopback0
O 1.0.0.20 [110/2] via 10.1.20.20, 02:22:40, Vlan20
10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
O 10.1.6.0/24 [110/2] via 10.1.20.20, 02:22:40, Vlan20
[110/2] via 10.1.13.6, 01:58:00, Vlan13
C 10.1.13.0/24 is directly connected, Vlan13
L 10.1.13.13/32 is directly connected, Vlan13
C 10.1.20.0/24 is directly connected, Vlan20
L 10.1.20.13/32 is directly connected, Vlan20
C 10.2.11.0/24 is directly connected, Vlan11
L 10.2.11.13/32 is directly connected, Vlan11
192.168.150.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.150.0/24 is directly connected, Vlan150
L 192.168.150.13/32 is directly connected, Vlan150
-----------------------------------------
R11#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 4 subnets
O 1.0.0.6 [110/3] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
C 1.0.0.11 is directly connected, Loopback0
O 1.0.0.13 [110/2] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
O 1.0.0.20 [110/3] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
C 192.168.150.0/24 is directly connected, FastEthernet0/0.150
10.0.0.0/24 is subnetted, 4 subnets
C 10.2.11.0 is directly connected, FastEthernet0/0.5
O 10.1.13.0 [110/2] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
O 10.1.6.0 [110/3] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
O 10.1.20.0 [110/2] via 10.2.11.13, 01:55:55, FastEthernet0/0.5
R11#
_________________________________
CEF info
R20#
R20#sh ip cef
R20#sh ip cef
Prefix Next Hop Interface
0.0.0.0/0 no route
0.0.0.0/8 drop
0.0.0.0/32 receive
1.0.0.6/32 10.1.6.6 Vlan6
1.0.0.11/32 10.1.20.13 Vlan20
1.0.0.13/32 10.1.20.13 Vlan20
1.0.0.20/32 receive Loopback0
10.1.6.0/24 attached Vlan6
10.1.6.0/32 receive Vlan6
10.1.6.6/32 attached Vlan6
10.1.6.20/32 receive Vlan6
10.1.6.255/32 receive Vlan6
10.1.13.0/24 10.1.6.6 Vlan6
10.1.20.13 Vlan20
10.1.20.0/24 attached Vlan20
10.1.20.0/32 receive Vlan20
10.1.20.13/32 attached Vlan20
10.1.20.20/32 receive Vlan20
10.1.20.255/32 receive Vlan20
10.2.11.0/24 10.1.20.13 Vlan20
127.0.0.0/8 drop
192.168.150.0/24 attached Vlan150
192.168.150.0/32 receive Vlan150
192.168.150.20/32 receive Vlan150
192.168.150.254/32 attached Vlan150
192.168.150.255/32 receive Vlan150
224.0.0.0/4 drop
224.0.0.0/24 receive
240.0.0.0/4 drop
255.255.255.255/32 receive
---------------------------------------------------------
R6#sh ip cef
Prefix Next Hop Interface
0.0.0.0/0 no route
0.0.0.0/8 drop
0.0.0.0/32 receive
1.0.0.6/32 receive Loopback0
1.0.0.11/32 10.1.13.13 Vlan13
1.0.0.13/32 10.1.13.13 Vlan13
1.0.0.20/32 10.1.6.20 Vlan6
10.1.6.0/24 attached Vlan6
10.1.6.0/32 receive Vlan6
10.1.6.6/32 receive Vlan6
10.1.6.20/32 attached Vlan6
10.1.6.255/32 receive Vlan6
10.1.13.0/24 attached Vlan13
10.1.13.0/32 receive Vlan13
10.1.13.6/32 receive Vlan13
10.1.13.13/32 attached Vlan13
10.1.13.255/32 receive Vlan13
10.1.20.0/24 10.1.6.20 Vlan6
10.1.13.13 Vlan13
10.2.11.0/24 10.1.13.13 Vlan13
127.0.0.0/8 drop
192.168.150.0/24 attached Vlan150
192.168.150.0/32 receive Vlan150
192.168.150.6/32 receive Vlan150
192.168.150.254/32 attached Vlan150
192.168.150.255/32 receive Vlan150
224.0.0.0/4 drop
224.0.0.0/24 receive
240.0.0.0/4 drop
255.255.255.255/32 receive
---------------------------------------------------
R13#sh ip cef
Prefix Next Hop Interface
0.0.0.0/0 no route
0.0.0.0/8 drop
0.0.0.0/32 receive
1.0.0.6/32 10.1.13.6 Vlan13
1.0.0.11/32 10.2.11.11 Vlan11
1.0.0.13/32 receive Loopback0
1.0.0.20/32 10.1.20.20 Vlan20
10.1.6.0/24 10.1.13.6 Vlan13
10.1.20.20 Vlan20
10.1.13.0/24 attached Vlan13
10.1.13.0/32 receive Vlan13
10.1.13.6/32 attached Vlan13
10.1.13.13/32 receive Vlan13
10.1.13.255/32 receive Vlan13
10.1.20.0/24 attached Vlan20
10.1.20.0/32 receive Vlan20
10.1.20.13/32 receive Vlan20
10.1.20.20/32 attached Vlan20
10.1.20.255/32 receive Vlan20
10.2.11.0/24 attached Vlan11
10.2.11.0/32 receive Vlan11
10.2.11.11/32 attached Vlan11
10.2.11.13/32 receive Vlan11
10.2.11.255/32 receive Vlan11
127.0.0.0/8 drop
192.168.150.0/24 attached Vlan150
192.168.150.0/32 receive Vlan150
192.168.150.11/32 attached Vlan150
192.168.150.13/32 receive Vlan150
192.168.150.254/32 attached Vlan150
192.168.150.255/32 receive Vlan150
224.0.0.0/4 drop
Prefix Next Hop Interface
224.0.0.0/24 receive
240.0.0.0/4 drop
255.255.255.255/32 receive
----------------------------------
R11#sh ip cef
Prefix Next Hop Interface
0.0.0.0/0 drop Null0 (default route handler entry)
0.0.0.0/32 receive
1.0.0.6/32 10.2.11.13 FastEthernet0/0.5
1.0.0.11/32 receive
1.0.0.13/32 10.2.11.13 FastEthernet0/0.5
1.0.0.20/32 10.2.11.13 FastEthernet0/0.5
10.1.6.0/24 10.2.11.13 FastEthernet0/0.5
10.1.13.0/24 10.2.11.13 FastEthernet0/0.5
10.1.20.0/24 10.2.11.13 FastEthernet0/0.5
10.2.11.0/24 attached FastEthernet0/0.5
10.2.11.0/32 receive
10.2.11.11/32 receive
10.2.11.13/32 10.2.11.13 FastEthernet0/0.5
10.2.11.255/32 receive
192.168.150.0/24 attached FastEthernet0/0.150
192.168.150.0/32 receive
192.168.150.11/32 receive
192.168.150.12/32 192.168.150.12 FastEthernet0/0.150
192.168.150.13/32 192.168.150.13 FastEthernet0/0.150
192.168.150.254/32 192.168.150.254 FastEthernet0/0.150
192.168.150.255/32 receive
224.0.0.0/4 drop
224.0.0.0/24 receive
255.255.255.255/32 receive
-----------------------------------------------
Running config:
R20#sh run
Building configuration...
Current configuration : 3073 bytes
!
! Last configuration change at 17:55:52 UTC Mon May 23 2016
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R20
!
boot-start-marker
boot system flash c890-universalk9-mz.152-4.M2.bin
boot system flash c890-universalk9-mz.151-2.T3.bin
boot system flash c890-universalk9-mz.152-2.T.bin
boot system flash c890-universalk9-mz.124-22.YB.bin
boot-end-marker
!
!
!
no aaa new-model
service-module wlan-ap 0 bootimage autonomous
!
!
ip cef
!
!
!
!
!
!
!
!
no ip domain lookup
no ipv6 cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
license udi pid CISCO892W-AGN-E-K9 sn FCZ141290YQ
!
!
archive
log config
hidekeys
!
redundancy
!
!
!
!
!
csdb tcp synwait-time 30
csdb tcp idle-time 3600
csdb tcp finwait-time 5
csdb tcp reassembly max-memory 1024
csdb tcp reassembly max-queue-length 16
csdb udp idle-time 30
csdb icmp idle-time 10
csdb session max-session 65535
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.0.0.20 255.255.255.255
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
isdn termination multidrop
!
interface FastEthernet0
switchport mode trunk
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface FastEthernet4
no ip address
!
interface FastEthernet5
no ip address
!
interface FastEthernet6
no ip address
!
interface FastEthernet7
no ip address
!
interface FastEthernet8
no ip address
shutdown
duplex auto
speed auto
!
interface GigabitEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface wlan-ap0
description Service module interface to manage the embedded AP
no ip address
arp timeout 0
!
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
no ip address
!
interface Vlan1
no ip address
shutdown
mpls ip
!
interface Vlan6
ip address 10.1.6.20 255.255.255.0
no ip route-cache
mpls ip
!
interface Vlan10
ip address 10.2.10.20 255.255.255.0
shutdown
mpls ip
!
interface Vlan20
ip address 10.1.20.20 255.255.255.0
mpls ip
!
interface Vlan150
ip address 192.168.150.20 255.255.255.0
!
router ospf 1
network 1.0.0.0 0.0.0.255 area 0
network 10.1.0.0 0.0.255.255 area 0
network 10.2.0.0 0.0.255.255 area 0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
ip access-list extended Test
permit ip any any
!
!
!
tftp-server flash c890-universalk9-mz.152-4.M2.bin
!
control-plane
!
!
!
!
mgcp profile default
!
!
!
!
!
alias exec int sh ip int brief
alias exec f sh flash
alias exec r sh ip route
alias exec i sh ip int brief
!
line con 0
logging synchronous
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin udptn ssh
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
logging synchronous
no login
transport input telnet
line vty 5 15
exec-timeout 0 0
logging synchronous
no login
transport input telnet
!
scheduler max-task-time 5000
!
end
----------------------------------------------------
R6#sh run
Building configuration...
Current configuration : 3014 bytes
!
! Last configuration change at 15:44:05 UTC Mon May 23 2016
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R6
!
boot-start-marker
boot system flash c890-universalk9-mz.152-4.M2.bin
boot system flash c890-universalk9-mz.152-2.T.bin
boot system flash c890-universalk9-mz.151-3.T.bin
boot system flash c890-universalk9-mz.150-1.M7.bin
boot-end-marker
!
!
!
no aaa new-model
service-module wlan-ap 0 bootimage autonomous
!
!
ip cef
!
!
!
!
!
!
ip dhcp pool WIFI
network 192.168.150.0 255.255.255.0
!
!
!
no ip domain lookup
no ipv6 cef
!
!
!
!
!
multilink bundle-name authenticated
mpls label protocol ldp
!
!
!
!
!
!
license udi pid CISCO892W-AGN-E-K9 sn FCZ16019157
!
!
!
redundancy
!
!
!
!
!
csdb tcp synwait-time 30
csdb tcp idle-time 3600
csdb tcp finwait-time 5
csdb tcp reassembly max-memory 1024
csdb tcp reassembly max-queue-length 16
csdb udp idle-time 30
csdb icmp idle-time 10
csdb session max-session 65535
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.0.0.6 255.255.255.255
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
isdn termination multidrop
!
interface FastEthernet0
switchport mode trunk
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface FastEthernet4
no ip address
!
interface FastEthernet5
no ip address
!
interface FastEthernet6
no ip address
!
interface FastEthernet7
no ip address
!
interface FastEthernet8
no ip address
shutdown
duplex auto
speed auto
!
interface GigabitEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface wlan-ap0
description Service module interface to manage the embedded AP
ip unnumbered Vlan150
arp timeout 0
!
interface Wlan-GigabitEthernet0
description Internal switch interface connecting to the embedded AP
switchport access vlan 150
no ip address
!
interface Vlan1
no ip address
!
interface Vlan6
ip address 10.1.6.6 255.255.255.0
mpls ip
!
interface Vlan13
ip address 10.1.13.6 255.255.255.0
mpls ip
!
interface Vlan101
ip address 10.2.101.6 255.255.255.0
shutdown
mpls ip
!
interface Vlan150
ip address 192.168.150.6 255.255.255.0
!
router ospf 1
network 1.0.0.0 0.0.0.255 area 0
network 10.1.0.0 0.0.255.255 area 0
network 10.2.0.0 0.0.255.255 area 0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
mgcp profile default
!
!
!
!
!
alias exec int sh ip int brief
alias exec f sh flash
alias exec r sh ip route
alias exec i sh ip int brief
!
line con 0
logging synchronous
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin udptn ssh
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
logging synchronous
no login
transport input telnet
line vty 5 15
exec-timeout 0 0
logging synchronous
no login
transport input telnet
!
scheduler max-task-time 5000
!
end
--------------------------------------------
R13#sh run
Building configuration...
Current configuration : 2232 bytes
!
! Last configuration change at 17:13:34 UTC Mon May 23 2016
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R13
!
boot-start-marker
boot system flash c890-universalk9-mz.152-2.T.bin
boot system flash c890-universalk9-mz.151-2.T3.bin
boot-end-marker
!
!
!
no aaa new-model
!
crypto pki token default removal timeout 0
!
!
ip auth-proxy max-login-attempts 5
ip admission max-login-attempts 5
!
!
!
!
!
no ip domain lookup
ip cef
no ipv6 cef
!
!
!
!
multilink bundle-name authenticated
mpls label protocol ldp
!
!
!
!
!
!
license udi pid CISCO892F-K9 sn FTX1601813F
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.0.0.13 255.255.255.255
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
isdn termination multidrop
!
interface FastEthernet0
switchport mode trunk
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface FastEthernet4
no ip address
!
interface FastEthernet5
no ip address
!
interface FastEthernet6
no ip address
!
interface FastEthernet7
no ip address
!
interface FastEthernet8
no ip address
shutdown
duplex auto
speed auto
!
interface GigabitEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface Vlan1
no ip address
!
interface Vlan11
ip address 10.2.11.13 255.255.255.0
mpls ip
!
interface Vlan13
ip address 10.1.13.13 255.255.255.0
mpls ip
!
interface Vlan20
ip address 10.1.20.13 255.255.255.0
mpls ip
!
interface Vlan150
ip address 192.168.150.13 255.255.255.0
!
router ospf 1
network 1.0.0.0 0.0.0.255 area 0
network 10.1.0.0 0.0.255.255 area 0
network 10.2.0.0 0.0.255.255 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
!
!
mgcp profile default
!
!
!
!
alias exec int sh ip int brief
alias exec f sh flash
alias exec r sh ip route
alias exec i sh ip int brief
!
line con 0
logging synchronous
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
logging synchronous
no login
transport input telnet
line vty 5 15
exec-timeout 0 0
logging synchronous
no login
transport input telnet
!
!
end
-------------------------------------------
R11#sh run
Building configuration...
Current configuration : 2737 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R11
!
boot-start-marker
boot-end-marker
!
! card type command needed for slot/vwic-slot 0/0
!
no aaa new-model
voice-card 0
no dspfarm
!
voice-card 1
no dspfarm
!
dot11 syslog
!
!
ip cef
!
!
ip vrf Wesco
rd 65000:2
route-target export 1:1
route-target import 1:1
!
no ip domain lookup
!
multilink bundle-name authenticated
mpls label protocol ldp
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.0.0.11 255.255.255.255
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.5
encapsulation dot1Q 11
ip address 10.2.11.11 255.255.255.0
mpls ip
!
interface FastEthernet0/0.50
encapsulation dot1Q 50
ip vrf forwarding Wesco
ip address 172.16.50.11 255.255.255.0
shutdown
!
interface FastEthernet0/0.150
encapsulation dot1Q 150
ip address 192.168.150.11 255.255.255.0
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1/0
no ip address
shutdown
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 1.0.0.0 0.0.0.255 area 0
network 10.2.0.0 0.0.255.255 area 0
!
router bgp 200
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 1.0.0.1 remote-as 200
neighbor 1.0.0.1 update-source Loopback0
neighbor 1.0.0.10 remote-as 200
neighbor 1.0.0.10 update-source Loopback0
!
address-family vpnv4
neighbor 1.0.0.1 activate
neighbor 1.0.0.1 send-community extended
neighbor 1.0.0.10 activate
neighbor 1.0.0.10 send-community extended
exit-address-family
!
address-family ipv4 vrf Wesco
neighbor 172.16.50.15 remote-as 65000
neighbor 172.16.50.15 activate
neighbor 172.16.50.15 as-override
no synchronization
network 172.16.50.0 mask 255.255.255.0
exit-address-family
!
ip forward-protocol nd
!
!
ip http server
no ip http secure-server
!
!
!
!
!
!
tftp-server flash:c2800nm-advipservicesk9-mz.124-15.T7.bin
!
control-plane
!
!
!
voice-port 1/0/0
!
voice-port 1/0/1
!
voice-port 1/0/2
!
voice-port 1/0/3
!
voice-port 1/0/4
!
voice-port 1/0/5
!
voice-port 1/0/6
!
voice-port 1/0/7
!
voice-port 1/0/8
!
voice-port 1/0/9
!
voice-port 1/0/10
!
voice-port 1/0/11
!
!
!
!
!
!
!
no alias exec s
alias exec int sh ip int brief
alias exec f sh flash
alias exec r sh ip route
alias exec i sh ip int brief
!
line con 0
logging synchronous
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
logging synchronous
no login
transport input telnet
line vty 5 15
exec-timeout 0 0
logging synchronous
no login
transport input telnet
!
scheduler allocate 20000 1000
!
end
______________________________
MPLS LDP binding Info
lib entry: 1.0.0.6/32, rev 2
local binding: label: 21
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: 18
lib entry: 1.0.0.11/32, rev 4
local binding: label: 22
remote binding: lsr: 1.0.0.6:0, label: 26
remote binding: lsr: 1.0.0.13:0, label: 19
lib entry: 1.0.0.13/32, rev 6
local binding: label: 23
remote binding: lsr: 1.0.0.6:0, label: 27
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 1.0.0.20/32, rev 8
local binding: label: imp-null
remote binding: lsr: 1.0.0.6:0, label: 28
remote binding: lsr: 1.0.0.13:0, label: 16
lib entry: 10.1.6.0/24, rev 10
local binding: label: imp-null
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: 17
lib entry: 10.1.13.0/24, rev 12
local binding: label: 24
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 10.1.20.0/24, rev 14
local binding: label: imp-null
remote binding: lsr: 1.0.0.6:0, label: 29
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 10.2.11.0/24, rev 16
local binding: label: 25
remote binding: lsr: 1.0.0.6:0, label: 30
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 192.168.150.0/24, rev 18
local binding: label: imp-null
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: imp-null
----------------------------------------------------------
R6#sh mpls ldp bindings
lib entry: 1.0.0.6/32, rev 2
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: 21
remote binding: lsr: 1.0.0.13:0, label: 18
lib entry: 1.0.0.11/32, rev 4
local binding: label: 26
remote binding: lsr: 1.0.0.20:0, label: 22
remote binding: lsr: 1.0.0.13:0, label: 19
lib entry: 1.0.0.13/32, rev 6
local binding: label: 27
remote binding: lsr: 1.0.0.20:0, label: 23
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 1.0.0.20/32, rev 8
local binding: label: 28
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: 16
lib entry: 10.1.6.0/24, rev 10
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: 17
lib entry: 10.1.13.0/24, rev 12
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: 24
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 10.1.20.0/24, rev 14
local binding: label: 29
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 10.2.11.0/24, rev 16
local binding: label: 30
remote binding: lsr: 1.0.0.20:0, label: 25
remote binding: lsr: 1.0.0.13:0, label: imp-null
lib entry: 192.168.150.0/24, rev 18
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.13:0, label: imp-null
-----------------------------------------------
R13#sh mpls ldp bindings
lib entry: 1.0.0.6/32, rev 2
local binding: label: 18
remote binding: lsr: 1.0.0.20:0, label: 21
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 192.168.150.11:0, label: 18
lib entry: 1.0.0.11/32, rev 4
local binding: label: 19
remote binding: lsr: 1.0.0.20:0, label: 22
remote binding: lsr: 1.0.0.6:0, label: 26
remote binding: lsr: 192.168.150.11:0, label: imp-null
lib entry: 1.0.0.13/32, rev 6
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: 23
remote binding: lsr: 1.0.0.6:0, label: 27
remote binding: lsr: 192.168.150.11:0, label: 17
lib entry: 1.0.0.20/32, rev 8
local binding: label: 16
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.6:0, label: 28
remote binding: lsr: 192.168.150.11:0, label: 16
lib entry: 10.1.6.0/24, rev 10
local binding: label: 17
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 192.168.150.11:0, label: 19
lib entry: 10.1.13.0/24, rev 12
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: 24
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 192.168.150.11:0, label: 20
lib entry: 10.1.20.0/24, rev 14
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.6:0, label: 29
remote binding: lsr: 192.168.150.11:0, label: 21
lib entry: 10.2.11.0/24, rev 16
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: 25
remote binding: lsr: 1.0.0.6:0, label: 30
remote binding: lsr: 192.168.150.11:0, label: imp-null
lib entry: 192.168.150.0/24, rev 18
local binding: label: imp-null
remote binding: lsr: 1.0.0.20:0, label: imp-null
remote binding: lsr: 1.0.0.6:0, label: imp-null
remote binding: lsr: 192.168.150.11:0, label: imp-null
--------------------------------------
R11#sh mpls ldp bindings
tib entry: 1.0.0.6/32, rev 45
local binding: tag: 18
remote binding: tsr: 1.0.0.13:0, tag: 18
tib entry: 1.0.0.11/32, rev 4
local binding: tag: imp-null
remote binding: tsr: 1.0.0.13:0, tag: 19
tib entry: 1.0.0.13/32, rev 43
local binding: tag: 17
remote binding: tsr: 1.0.0.13:0, tag: imp-null
tib entry: 1.0.0.20/32, rev 41
local binding: tag: 16
remote binding: tsr: 1.0.0.13:0, tag: 16
tib entry: 10.1.6.0/24, rev 47
local binding: tag: 19
remote binding: tsr: 1.0.0.13:0, tag: 17
tib entry: 10.1.13.0/24, rev 49
local binding: tag: 20
remote binding: tsr: 1.0.0.13:0, tag: imp-null
tib entry: 10.1.20.0/24, rev 51
local binding: tag: 21
remote binding: tsr: 1.0.0.13:0, tag: imp-null
tib entry: 10.2.11.0/24, rev 16
local binding: tag: imp-null
remote binding: tsr: 1.0.0.13:0, tag: imp-null
tib entry: 192.168.150.0/24, rev 12
local binding: tag: imp-null
remote binding: tsr: 1.0.0.13:0, tag: imp-null
___________________________
According to MPLS forwarding information if I am pinging from R20 to R11 lo ip address 1.0.0.11
R20
22 19 1.0.0.11/32 0 Vl20 10.1.20.13
it should tag the packets with outgoing label 19 however it is not doing it it is tagging 18 for some reason:
R20#trace 1.0.0.11
Type escape sequence to abort.
Tracing the route to 1.0.0.11
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.20.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
2 10.1.13.6 0 msec 0 msec 4 msec
3 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
4 10.1.13.6 4 msec 0 msec 0 msec
5 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
6 10.1.13.6 0 msec 4 msec 0 msec
7 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
8 10.1.13.6 0 msec 0 msec 0 msec
9 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
10 10.1.13.6 4 msec 0 msec 0 msec
11 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
12 10.1.13.6 4 msec 0 msec 12 msec
13 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
14 10.1.13.6 0 msec 0 msec 4 msec
15 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
16 10.1.13.6 4 msec 0 msec 0 msec
17 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
18 10.1.13.6 0 msec 12 msec 0 msec
19 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
20 10.1.13.6 0 msec 4 msec 0 msec
21 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
22 10.1.13.6 0 msec 4 msec 0 msec
23 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
24 10.1.13.6 4 msec 0 msec 4 msec
25 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
26 10.1.13.6 4 msec 4 msec 0 msec
27 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
28 10.1.13.6 4 msec 0 msec 4 msec
29 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 4 msec
30 10.1.13.6 0 msec 4 msec 4 msec
Same for R6
R6#trace 1.0.0.11
Type escape sequence to abort.
Tracing the route to 1.0.0.11
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
2 * * *
3 * * *
4 * * *
------------------------------------------
However traffic from R11 goes as expected
16 16 1.0.0.20/32 0 Fa0/0.5 10.2.11.13
18 18 1.0.0.6/32 0 Fa0/0.5 10.2.11.13
R11#trace 1.0.0.20
Type escape sequence to abort.
Tracing the route to 1.0.0.20
1 10.2.11.13 [MPLS: Label 16 Exp 0] 0 msec 0 msec 0 msec
2 10.1.20.20 0 msec * 0 msec
R11#
R11#trace 1.0.0.6
Type escape sequence to abort.
Tracing the route to 1.0.0.6
1 10.2.11.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
2 10.1.13.6 0 msec * 0 msec
R11#
_____________________________
Can you please advise why the tag given is wrong from R20 and R6?
I have reloaded routers several times as well as issues no mpls ip and mpls ip for fresh LDP bindings but still no change (lable IDs are different but R20 and R6 always sending wrong lable and it is always forwarding table value minus 1 - in above example it is 18 19-1)
Please advise.
I have already attached part of Visio screenshot this post
Regards,
Robert
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05-23-2016 11:09 AM
Seems like you are having a routing loop. you trace from R20 seems to be looping between two devices.
3 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
4 10.1.13.6 4 msec 0 msec 0 msec
Could you please check your configuration. Also do check for any default or static routes which shouldnt be present.
COuld you also please share the below output:
- show mpls for 10.0.0.11
- show ip cef 10.0.0.11 det
- ping mpls ipv4 10.0.0.11 255.255.255.255
capture the first two commands from the core router and also from the PE router towards P router R20.
Regards
Vinit
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05-23-2016 11:24 AM
Thanks for your reply Vinit,
Correct it is looping and the reason it is doing it the lable value that is sent from R20 to R13 the value is 18.
If you see the forwarding table of receiving router R13 it has next hop to R6 which on its own has a route back to R13 - that is why there is a loop
R13#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 Pop Label 1.0.0.20/32 126 Vl20 10.1.20.20
17 Pop Label 10.1.6.0/24 0 Vl13 10.1.13.6
Pop Label 10.1.6.0/24 0 Vl20 10.1.20.20
===18 Pop Label 1.0.0.6/32 28476 Vl13 10.1.13.6 ======
19 Pop Label 1.0.0.11/32 0 Vl11 10.2.11.11
The question here is even if the forwarding table of R20 has the value 19 why it is sending with the value 18?
Forwarding table of R20:
R20#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
21 Pop Label 1.0.0.6/32 0 Vl6 10.1.6.6
======22 19 1.0.0.11/32 0 Vl20 10.1.20.13
23 Pop Label 1.0.0.13/32 0 Vl20 10.1.20.13
24 Pop Label 10.1.13.0/24 0 Vl6 10.1.6.6
Pop Label 10.1.13.0/24 0 Vl20 10.1.20.13
25 Pop Label 10.2.11.0/24 0 Vl20 10.1.20.13
----------------
Trace sending with 18:
R20# trace 1.0.0.11
Type escape sequence to abort.
Tracing the route to 1.0.0.11
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.20.13 [MPLS: Label ==18== Exp 0] 0 msec 0 msec 0 msec
________________________
Here is requested output:
R20#sh mpl
R20#sh mpls 1.0.0.11
^
% Invalid input detected at '^' marker.
R20#sh mpls for 1.0.0.11
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
22 19 1.0.0.11/32 0 Vl20 10.1.20.13
R20#sh ip cef 1.0.0.11
1.0.0.11/32
nexthop 10.1.20.13 Vlan20 label 19
R20#
R20#ping mpl
R20#ping mpls ip v
R20#ping mpls ipv
R20#ping mpls ipv4 1.0.0.11 255.255.255.255
Sending 5, 100-byte MPLS Echos to 1.0.0.11/32,
timeout is 2 seconds, send interval is 0 msec:
Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface,
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no label entry,
'P' - no rx intf label prot, 'p' - premature termination of LSP,
'R' - transit router, 'I' - unknown upstream index,
'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
fffff
Success rate is 0 percent (0/5)
-----------------------------------------
R6#sh mpls for 1.0.0.11
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
26 19 1.0.0.11/32 0 Vl13 10.1.13.13
R6#sh ip ce
R6#sh ip cef 1.0.0.11 de
R6#sh ip cef 1.0.0.11 detail
1.0.0.11/32, epoch 0
local label info: global/26
nexthop 10.1.13.13 Vlan13 label 19
R6#
R6#ping mpl
R6#ping mpls ipv
R6#ping mpls ipv4 1.0.0.11 255.255.255.255
Sending 5, 100-byte MPLS Echos to 1.0.0.11/32,
timeout is 2 seconds, send interval is 0 msec:
Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface,
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no label entry,
'P' - no rx intf label prot, 'p' - premature termination of LSP,
'R' - transit router, 'I' - unknown upstream index,
'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
.....
Success rate is 0 percent (0/5)
-----------------------------------
R13#sh mpls fo
R13#sh mpls for 1.0.0.11
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
19 Pop Label 1.0.0.11/32 0 Vl11 10.2.11.11
R13#sh ip cef 1.0.0.11 det
1.0.0.11/32, epoch 0, flags need ps clean
local label info: global/19
nexthop 10.2.11.11 Vlan11
R13#
R13#ping mpls ipv
R13#ping mpls ipv4 1.0.0.11 255.255.255.255
Sending 5, 100-byte MPLS Echos to 1.0.0.11/32,
timeout is 2 seconds, send interval is 0 msec:
Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
'L' - labeled output interface, 'B' - unlabeled output interface,
'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
'M' - malformed request, 'm' - unsupported tlvs, 'N' - no label entry,
'P' - no rx intf label prot, 'p' - premature termination of LSP,
'R' - transit router, 'I' - unknown upstream index,
'X' - unknown return code, 'x' - return code 0
Type escape sequence to abort.
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
-----------------------------
R11#trace 1.0.0.20
Type escape sequence to abort.
Tracing the route to 1.0.0.20
1 10.2.11.13 [MPLS: Label 16 Exp 0] 0 msec 0 msec 0 msec
2 10.1.20.20 0 msec * 0 msec
R11#
R11#trace 1.0.0.6
Type escape sequence to abort.
Tracing the route to 1.0.0.6
1 10.2.11.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
2 10.1.13.6 0 msec * 0 msec
R11#sh ip mpl
R11#sh mpl
R11#sh mpls fo
R11#sh mpls for 1.0.0.11
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
R11#sh ip cef 1.0.0.11 det
1.0.0.11/32, version 90, epoch 0, connected, receive
tag information set
local tag: implicit-null
R11#
R11#ping mpls ipv4 1.0.0.11 255.255.255.255
% Directly connected address not allowed
________________________
Thanks again
Regards,
Robert
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05-23-2016 11:38 AM
Hi,
Your CEF programming seems to be fine on R20. What do you see when you trigger a ping/trace from R10 for 1.0.0.11?.
Can you try configuring a new loopback address on R6 and ping/trace the new address from R20?. Can you check if the new one works fine or you are observing same issue?. If so, is it using the same label or different?.
-Nagendra
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05-23-2016 04:01 PM
Thanks for response Nagendra,
I have temporarily disabled interface that goes from R20 to R10 see sh interface output from R20
R20#i
Interface IP-Address OK? Method Status Protocol
BRI0 unassigned YES NVRAM administratively down down
BRI0:1 unassigned YES unset administratively down down
BRI0:2 unassigned YES unset administratively down down
FastEthernet0 unassigned YES unset up up
FastEthernet1 unassigned YES unset down down
FastEthernet2 unassigned YES unset down down
FastEthernet3 unassigned YES unset down down
FastEthernet4 unassigned YES unset down down
FastEthernet5 unassigned YES unset down down
FastEthernet6 unassigned YES unset down down
FastEthernet7 unassigned YES unset down down
FastEthernet8 unassigned YES NVRAM administratively down down
GigabitEthernet0 unassigned YES NVRAM administratively down down
Loopback0 1.0.0.20 YES NVRAM up up
Vlan1 unassigned YES unset administratively down down
Vlan6 10.1.6.20 YES NVRAM up up
=====Vlan10 10.2.10.20 YES NVRAM administratively down down=====
Vlan20 10.1.20.20 YES NVRAM up up
Vlan150 192.168.150.20 YES NVRAM up up
Wlan-GigabitEthernet0 unassigned YES unset up up
wlan-ap0 unassigned YES NVRAM up up
Interface Vlan 10 connects to R10 that is another PE. to answer your question I will enable it temporary.
Here is the output from R10
R10#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 Pop Label 10.1.20.0/24 0 Vl10 10.2.10.20
17 24 10.1.13.0/24 0 Vl10 10.2.10.20
18 25 10.2.11.0/24 0 Vl10 10.2.10.20
19 Pop Label 1.0.0.20/32 0 Vl10 10.2.10.20
20 Pop Label 10.1.6.0/24 0 Vl10 10.2.10.20
24 23 1.0.0.13/32 0 Vl10 10.2.10.20
25 No Label 1.0.0.18/32[V] 0 Vl70 172.16.70.18
26 No Label 172.16.70.0/24[V] \
0 aggregate/Wesco
27 22 1.0.0.11/32 0 Vl10 10.2.10.20
28 21 1.0.0.6/32 0 Vl10 10.2.10.20
R10#
R10#
R10#ping 1.0.0.11
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.0.0.11, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R10#trace 1.0.0.11
Type escape sequence to abort.
Tracing the route to 1.0.0.11
VRF info: (vrf in name/id, vrf out name/id)
1 10.2.10.20 [MPLS: Label 22 Exp 0] 0 msec 0 msec 4 msec
2 10.1.20.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
3 10.1.13.6 0 msec 0 msec 4 msec
4 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
5 10.1.13.6 0 msec 0 msec 4 msec
6 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
7 10.1.13.6 0 msec 0 msec 4 msec
8 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
9 10.1.13.6 0 msec 4 msec 0 msec
10 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
11 10.1.13.6 4 msec 0 msec 4 msec
12 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
13 10.1.13.6 0 msec 4 msec 0 msec
14 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
15 10.1.13.6 4 msec 0 msec 4 msec
16 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
17 10.1.13.6 4 msec 0 msec 4 msec
18 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
19 10.1.13.6 4 msec 0 msec 4 msec
20 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
21 10.1.13.6 4 msec 4 msec 0 msec
22 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 4 msec
23 10.1.13.6 0 msec 4 msec 4 msec
24 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
25 10.1.13.6 4 msec 4 msec 0 msec
26 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
27 10.1.13.6 4 msec 0 msec 4 msec
28 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 4 msec
29 10.1.13.6 0 msec 4 msec 4 msec
30 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 4 msec
R10#
R10#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 5 subnets
O 1.0.0.6 [110/3] via 10.2.10.20, 00:01:08, Vlan10
C 1.0.0.10 is directly connected, Loopback0
O 1.0.0.11 [110/4] via 10.2.10.20, 00:01:08, Vlan10
O 1.0.0.13 [110/3] via 10.2.10.20, 00:01:08, Vlan10
O 1.0.0.20 [110/2] via 10.2.10.20, 00:01:08, Vlan10
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
O 10.1.6.0/24 [110/2] via 10.2.10.20, 00:01:08, Vlan10
O 10.1.13.0/24 [110/3] via 10.2.10.20, 00:01:08, Vlan10
O 10.1.20.0/24 [110/2] via 10.2.10.20, 00:01:08, Vlan10
C 10.2.10.0/24 is directly connected, Vlan10
L 10.2.10.10/32 is directly connected, Vlan10
O 10.2.11.0/24 [110/3] via 10.2.10.20, 00:01:08, Vlan10
192.168.150.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.150.0/24 is directly connected, Vlan150
L 192.168.150.10/32 is directly connected, Vlan150
This is ping to R20 (successful)
R10#ping 10.2.10.20
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.10.20, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
___________________________
Regarding configuring new loopback on R6 - ping will work from R20 as it works on existing now. - here is the output (it uses IP rather then MPLS)
R20#ping 1.0.0.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.0.0.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
R20#trace 1.0.0.6
Type escape sequence to abort.
Tracing the route to 1.0.0.6
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.6.6 4 msec * 0 msec
- If needed I can enable Vlan to another to another PE exiting R6 (the router is R1)
Here is the output of that router:
R1#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Untagged 10.1.13.0/24 0 Gi0/0.101 10.2.101.6
17 Untagged 10.1.6.0/24 0 Gi0/0.101 10.2.101.6
18 Untagged 10.1.20.0/24 0 Gi0/0.101 10.2.101.6
19 Untagged 10.2.11.0/24 0 Gi0/0.101 10.2.101.6
20 Untagged 1.0.0.6/32 0 Gi0/0.101 10.2.101.6
21 Untagged 1.0.0.11/32 0 Gi0/0.101 10.2.101.6
22 Untagged 1.0.0.13/32 0 Gi0/0.101 10.2.101.6
23 Untagged 1.0.0.20/32 0 Gi0/0.101 10.2.101.6
26 Untagged 1.0.0.5/32[V] 590 Gi0/0.22 172.16.22.9
27 Untagged 1.0.0.9/32[V] 0 Gi0/0.22 172.16.22.9
28 Untagged 1.0.0.12/32[V] 1416 Gi0/0.22 172.16.22.9
29 Untagged 2.0.0.0/24[V] 0 Gi0/0.22 172.16.22.9
30 Aggregate 172.16.22.0/24[V] 0
31 Untagged 192.168.10.0/24[V] \
0 Gi0/0.22 172.16.22.9
---------------------------------------------
The loopback ip of R1 is 1.0.0.1
New Forwarding table for R20
R20#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
===16 16 1.0.0.1/32 0 Vl6 10.1.6.6 =====
18 No Label 1.0.0.10/32 0 drop
20 Pop Label 10.2.101.0/24 0 Vl6 10.1.6.6
21 Pop Label 1.0.0.6/32 0 Vl6 10.1.6.6
22 19 1.0.0.11/32 8334 Vl20 10.1.20.13
23 Pop Label 1.0.0.13/32 0 Vl20 10.1.20.13
24 Pop Label 10.1.13.0/24 0 Vl6 10.1.6.6
Pop Label 10.1.13.0/24 0 Vl20 10.1.20.13
25 Pop Label 10.2.11.0/24 0 Vl20 10.1.20.13
Pinging from R20 the loopback of R1
R20#ping 1.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R20#trace 1.0.0.1
Type escape sequence to abort.
Tracing the route to 1.0.0.1
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.6.6 [MPLS: Label 16 Exp 0] 0 msec 0 msec 4 msec
2 10.2.101.1 0 msec * 0 msec
To answer your question it works normally from R20
Let me try from R11
Ping succeeds but traffic from R6 during the path pas-through using IP rather then MPLS
R11#ping 1.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R11#
R11#
R11#trace 1.0.0.1
Type escape sequence to abort.
Tracing the route to 1.0.0.1
1 10.2.11.13 [MPLS: Label 22 Exp 0] 0 msec 0 msec 4 msec
====2 10.1.13.6 0 msec 4 msec 0 msec==
3 10.2.101.1 0 msec * 0 msec
R11#
Tracing from R1 to R11 (loops again with the wrong tag/label number 18 in place of 19)
R1#ping 1.0.0.11
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.0.0.11, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R1#trace 1.0.0.11
Type escape sequence to abort.
Tracing the route to 1.0.0.11
1 10.2.101.6 4 msec 0 msec 0 msec
2 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
3 10.1.13.6 4 msec 0 msec 0 msec
4 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
5 10.1.13.6 0 msec 0 msec 0 msec
6 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
7 10.1.13.6 0 msec 0 msec 0 msec
8 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
9 10.1.13.6 0 msec 4 msec 0 msec
10 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 0 msec
11 10.1.13.6 0 msec 0 msec 4 msec
12 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
13 10.1.13.6 0 msec 0 msec 0 msec
14 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
15 10.1.13.6 0 msec 4 msec 0 msec
16 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
17 10.1.13.6 4 msec 0 msec 0 msec
18 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
19 10.1.13.6 4 msec 0 msec 4 msec
20 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 0 msec 4 msec
21 10.1.13.6 0 msec 4 msec 0 msec
22 10.1.13.13 [MPLS: Label 18 Exp 0] 4 msec 0 msec 0 msec
23 10.1.13.6 4 msec 0 msec 4 msec
24 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
25 10.1.13.6 4 msec 0 msec 4 msec
26 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
27 10.1.13.6 4 msec 0 msec 4 msec
28 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
29 10.1.13.6 4 msec 0 msec 4 msec
30 10.1.13.13 [MPLS: Label 18 Exp 0] 0 msec 4 msec 0 msec
_____________________________________
Hope provided info provides required information to proceed with identification of the issue.
Thanks again.
Robert
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07-04-2016 05:57 AM
For People who may be interested in solution.
Looks like Cisco 891 and 892 routers are not designed to be P or PE services. I have replaced them with 2811 and 2921s and same configuration worked fine. 891 and 892 are good for CPE services though.
Hope that helps to someone in saving time troubleshooting similar issue.
Robert
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