- Introduction:
- AToM Configuration steps on IOS XR:
- AToM Configuration steps on IOS:
- Configuration example:
- Verification:
- Related Information:
Introduction:
In this document you will learn to configure L2VPN using AToM (Any transport over MPLS) technology for like to like circuit. This document will cover both configuration steps required on IOS and IOS-XR.
AToM Configuration steps on IOS XR:
1) Configure interface to provide L2 transport
Conf t
interface <interface-type> l2transport
2) Configure point to point cross connect:
Conf t
L2vpn
xconnect group <group-name>
p2p <xconnect-name>
interface <interface no>
Neighbor <ip-address> pw-id <pseudowire-id>
AToM Configuration steps on IOS:
1) Create pseudowire class:
Psedowire-class <class-name>
encapsulation mpls
2) Configure Cross connect on point to point interface:
Int <interface no>
Xconnect neighbor <ip-address> pw-id pseudowire-class <Class-name>
Configuration example:
In this example CE1 and CE2 don’t want to share their routing table with service provider so they prefer to go for L2VPN services. SP network is already MPLS enabled. We are configuring EoMPLS on PE1 running IOS XR and PE2 running classic IOS. Below are the basic configurations.
CE1CE2PE1PE2P1
hostname CE1 ! interface Loopback0 ip address 192.168.1.1 255.255.255.255 ip ospf 100 area 0 ! interface Ethernet1/0 ip address 172.16.1.1 255.255.255.0 ip ospf 100 area 0 | hostname CE2 ! interface Loopback0 ip address 192.168.1.2 255.255.255.255 ip ospf 100 area 0 ! interface Ethernet1/0 ip address 172.16.1.2 255.255.255.0 ip ospf 100 area 0 | interface Loopback0 ipv4 address 1.1.1.1 255.255.255.255 ! interface GigabitEthernet0/0/0/1 ipv4 address 10.1.1.1 255.255.255.252 ! router ospf 100 router-id 1.1.1.1 area 0 interface Loopback0 ! interface GigabitEthernet0/0/0/1 ! ! ! mpls ldp router-id 1.1.1.1 interface GigabitEthernet0/0/0/1 ! ! | interface Loopback0 ip address 3.3.3.3 255.255.255.255 ! interface Ethernet0/1 ip address 10.1.1.6 255.255.255.252 mpls ip ! router ospf 100 route-id 3.3.3.3 net 3.3.3.3 0.0.0.0 ar 0 net 10.1.1.6 0.0.0.0 ar 0 | interface Loopback0 ip address 2.2.2.2 255.255.255.255 ! interface Ethernet0/0 ip address 10.1.1.2 255.255.255.252 mpls ip interface Ethernet0/1 ip address 10.1.1.5 255.255.255.252 mpls ip ! router ospf 100 router-id 2.2.2.2 network 2.2.2.2 0.0.0.0 area 0 network 10.1.1.2 0.0.0.0 area 0 network 10.1.1.5 0.0.0.0 area 0 ! |
Now let’s begin L2VPN configurationon PE1 and PE2:
Configuring AToM on PE1:
Step1: Configure interface to provide L2 transport
RP/0/0/CPU0:PE1(config)#int gig0/0/0/4 l2transport
RP/0/0/CPU0:PE1(config-if-l2)#commit
Step2: Configure point to point cross connect
RP/0/0/CPU0:PE1(config)#l2vpn
RP/0/0/CPU0:PE1(config-l2vpn)#xconnect group TEST
RP/0/0/CPU0:PE1(config-l2vpn-xc)#p2p wire1
RP/0/0/CPU0:PE1(config-l2vpn-xc-p2p)#interface GigabitEthernet0/0/0/4
RP/0/0/CPU0:PE1(config-l2vpn-xc-p2p)#neighbor 3.3.3.3 pw-id 101
RP/0/0/CPU0:PE1(config-l2vpn-xc-p2p-pw)#commit
Configuring L2VPN on PE2:
Step1: Create pseudowire class:
PE2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
PE2(config)#pseudowire-class TEST
PE2(config-pw-class)# encapsulation mpls
PE2(config-pw-class)#exit
Step2: Configure Cross connect on point to point interface
PE2(config-if)#int e1/0
PE2(config-if)# xconnect 1.1.1.1 101 encapsulation mpls pw-class TEST
PE2(config-if)#exit
Verification:
After you configure L2VPN on both PE devices, you should see cross connect states are UP both PE.
Verification on PE1:
RP/0/0/CPU0:PE1#sh l2vpn xconnect detail
Tue Feb 18 20:46:30.248 TLT
Group TEST, XC wire1, state is up; Interworking none
AC: GigabitEthernet0/0/0/4, state is up
Type Ethernet
MTU 1500; XC ID 0x1; interworking none
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
PW: neighbor 3.3.3.3, PW ID 101, state is up ( established )
PW class not set, XC ID 0x1
Encapsulation MPLS, protocol LDP
PW type Ethernet, control word disabled, interworking none
PW backup disable delay 0 sec
Sequencing not set
MPLS Local Remote
------------ ------------------------------ -----------------------------
Label 16003 26
Group ID 0x200000a0 0x0
Interface GigabitEthernet0/0/0/4 unknown
MTU 1500 1500
Control word disabled disabled
PW type Ethernet Ethernet
VCCV CV type 0x2 0x12
(LSP ping verification) (LSP ping verification)
VCCV CC type 0x6 0x6
(router alert label) (router alert label)
(TTL expiry) (TTL expiry)
------------ ------------------------------ -----------------------------
MIB cpwVcIndex: 4278194081
Create time: 18/02/2014 19:37:50 (01:08:40 ago)
Last time status changed: 18/02/2014 20:43:20 (00:03:10 ago)
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
RP/0/0/CPU0:PE1#
Verification PE2:
PE2#sh mpls l2transport vc 101 detail
Local interface: Et1/0 up, line protocol up, Ethernet up
Destination address: 1.1.1.1, VC ID: 101, VC status: up
Output interface: Et0/1, imposed label stack {16 16003}
Preferred path: not configured
Default path: active
Next hop: 10.1.1.5
Create time: 00:06:19, last status change time: 00:06:10
Signaling protocol: LDP, peer 1.1.1.1:0 up
Targeted Hello: 3.3.3.3(LDP Id) -> 1.1.1.1, LDP is UP
Status TLV support (local/remote) : enabled/not supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: Not sent
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 26, remote 16003
PWID: 8212
Group ID: local 0, remote 536871072
MTU: local 1500, remote 1500
Remote interface description: GigabitEthernet0_0_0_4
Sequencing: receive disabled, send disabled
Control Word: Off (configured: autosense)
VC statistics:
transit packet totals: receive 0, send 81
transit byte totals: receive 0, send 9630
transit packet drops: receive 0, seq error 0, send 0
3) You can also test pseudowire using MPLS OAM feature. You just need to enable “mpls oam” in configuration mode.
PE2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
PE2(config)#mpls oam
RP/0/0/CPU0:PE1#conf t
Tue Feb 18 20:52:59.288 TLT
RP/0/0/CPU0:PE1(config)#mpls oam
RP/0/0/CPU0:PE1(config-oam)#commit
Verification:
PE2#ping mpls pseudowire 1.1.1.1 101 so 3.3.3.3
Sending 5, 100-byte MPLS Echos to 1.1.1.1,
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,
'l' - Label switched with FEC change, 'd' - see DDMAP for return code,
'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 = 2/2/3 ms
Total Time Elapsed 14 ms
RP/0/0/CPU0:PE1#ping pseudowire 3.3.3.3 101 so 1.1.1.1
Tue Feb 18 20:54:47.531 TLT
Sending 5, 100-byte MPLS Echos to 3.3.3.3 VC: 101,
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 rx label,
'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 = 1/2/3 ms
RP/0/0/CPU0:PE1#
Finally check end to end connectivity that CE devices can ping and exchange routing information with each other.
CE1#ping 172.16.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
CE2#ping 172.16.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
RP/0/0/CPU0:PE1#sh l2vpn xconnect detail
Tue Feb 18 20:46:30.248 TLT
Group TEST, XC wire1, state is up; Interworking none
AC: GigabitEthernet0/0/0/4, state is up
Type Ethernet
MTU 1500; XC ID 0x1; interworking none
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
PW: neighbor 3.3.3.3, PW ID 101, state is up ( established )
PW class not set, XC ID 0x1
Encapsulation MPLS, protocol LDP
PW type Ethernet, control word disabled, interworking none
PW backup disable delay 0 sec
Sequencing not set
MPLS Local Remote
------------ ------------------------------ -----------------------------
Label 16003 26
Group ID 0x200000a0 0x0
Interface GigabitEthernet0/0/0/4 unknown
MTU 1500 1500
Control word disabled disabled
PW type Ethernet Ethernet
VCCV CV type 0x2 0x12
(LSP ping verification) (LSP ping verification)
VCCV CC type 0x6 0x6
(router alert label) (router alert label)
(TTL expiry) (TTL expiry)
------------ ------------------------------ -----------------------------
MIB cpwVcIndex: 4278194081
Create time: 18/02/2014 19:37:50 (01:08:40 ago)
Last time status changed: 18/02/2014 20:43:20 (00:03:10 ago)
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
RP/0/0/CPU0:PE1#