ā07-31-2023 01:32 AM
i have this topology and i need to connect the tow 3725 over mpls xconncet , vc is up but there is no ping between tow 3725 vc is up .
Current configuration : 1812 bytes
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! Last configuration change at 08:17:28 UTC Mon Jul 31 2023
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version 16.6
service timestamps debug datetime msec
service timestamps log datetime msec
platform qfp utilization monitor load 80
no platform punt-keepalive disable-kernel-core
platform console serial
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hostname R1
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boot-start-marker
boot-end-marker
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no aaa new-model
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no login on-success log
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subscriber templating
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mpls label protocol ldp
mpls ldp neighbor 16.16.13.2 targeted
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!
multilink bundle-name authenticated
l2vpn
router-id 16.16.12.2
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-1090948164
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1090948164
revocation-check none
rsakeypair TP-self-signed-1090948164
!
!
crypto pki certificate chain TP-self-signed-1090948164
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!
!
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license udi pid CSR1000V sn 906UOK7XWI8
diagnostic bootup level minimal
spanning-tree extend system-id
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redundancy
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interface GigabitEthernet1
mtu 9216
ip address 16.16.12.2 255.255.255.252
negotiation auto
mpls ip
no mop enabled
no mop sysid
!
interface GigabitEthernet2
mtu 9216
no ip address
negotiation auto
no keepalive
no mop enabled
no mop sysid
xconnect 16.16.13.2 1 encapsulation mpls
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interface GigabitEthernet3
no ip address
shutdown
negotiation auto
no mop enabled
no mop sysid
!
interface GigabitEthernet4
no ip address
shutdown
negotiation auto
no mop enabled
no mop sysid
!
!
virtual-service csr_mgmt
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ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip route 16.16.13.0 255.255.255.252 16.16.12.1
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!
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mpls ldp router-id GigabitEthernet1 force
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control-plane
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!
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line con 0
stopbits 1
line vty 0 4
login
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!
!
!
!
end
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Current configuration : 1836 bytes
!
! Last configuration change at 08:15:19 UTC Mon Jul 31 2023
!
version 16.6
service timestamps debug datetime msec
service timestamps log datetime msec
platform qfp utilization monitor load 80
no platform punt-keepalive disable-kernel-core
platform console serial
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
!
!
!
no login on-success log
!
!
!
!
!
!
!
subscriber templating
!
!
!
!
!
mpls label protocol ldp
mpls ldp neighbor 16.16.12.2 targeted
!
!
multilink bundle-name authenticated
l2vpn
router-id 16.16.13.2
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-694856115
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-694856115
revocation-check none
rsakeypair TP-self-signed-694856115
!
!
crypto pki certificate chain TP-self-signed-694856115
!
!
!
!
!
!
!
!
!
license udi pid CSR1000V sn 91ERYW0C8B6
diagnostic bootup level minimal
spanning-tree extend system-id
!
!
!
!
redundancy
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface GigabitEthernet1
mtu 9216
ip address 16.16.13.2 255.255.255.252
negotiation auto
mpls ip
no mop enabled
no mop sysid
!
interface GigabitEthernet2
mtu 9216
no ip address
negotiation auto
no keepalive
no mop enabled
no mop sysid
xconnect 16.16.12.2 1 encapsulation mpls
!
interface GigabitEthernet3
no ip address
shutdown
negotiation auto
no mop enabled
no mop sysid
!
interface GigabitEthernet4
no ip address
shutdown
negotiation auto
no mop enabled
no mop sysid
!
!
virtual-service csr_mgmt
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip route 16.16.12.0 255.255.255.252 16.16.13.1
!
!
!
!
mpls ldp router-id GigabitEthernet1 force
l2vpn xconnect context 11
!
!
!
control-plane
!
!
!
!
!
!
line con 0
stopbits 1
line vty 0 4
login
!
!
!
!
!
!
end
-----------------------
R1#show xc
R1#show xconnect al
R1#show xconnect all
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi2:8(Ethernet) UP mpls 16.16.13.2:1 UP
R1#
ā
ā07-31-2023 05:07 AM
Can you share the config of three csr router
ā07-31-2023 07:23 AM - edited ā08-02-2023 07:06 AM
Hi @ghtmoha153 ,
The issue is the MPLS core is not configured properly. Not using the loopback interface addresses for the xconnect on the edge PEs breaks the end to end LSP. Here's what you should do to fix it.
- configure loopback address on all 3 CSRs
- configure a routing protocol (preferably ospf or isis) on all CSRs
- advertise loopback interfaces in the routing protocol
- use the loopback interface address as the xconnect peer address on the two CSRs rather than the physical interface address.
Regards,
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