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Cisco 12000/10700 v3.1.1 Router Manager User Guide
OL-4455-01
Appendix C Investigating LSP Black Holes Using Cisco 12000 Series Router Manager
Setup
This shows that the out-going label is now a pop tag, and hence the packets are no longer sent out
untagged. This means that the top label for the BGP next hop will be popped as the packets traverse the
router, but the packets will still have the second VPN label.
And more importantly, you can ping from CE1 to CE2.
If you re-run the
show mpls forwarding-table 10.5.5.5 command, you will see results similar to
Table C-2:
Note See http://www.cisco.com/warp/customer/105/troubleshoot_mpls_vpn.html for background
information.
Running Configs
CE1
!
version 12.0
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
no service single-slot-reload-enable
!
hostname cl-7505-1
!
boot system flash flash:cl-7505-1-confgNewTest
redundancy
no keepalive-enable
no logging buffered
no logging console
enable password atlantech
!
username lab password 0 amaf
username mozart password 0 amaf
ip subnet-zero
ip cef
no ip domain-lookup
no mpls traffic-eng auto-bw timers frequency 0
file prompt noisy
!
!
!
!
interface Serial2/0/0
no ip address
no ip directed-broadcast
!
Table C-2 Example Output
tag tag or VC or Tunnel Id Switched Interface
12306 Pop tag 10.2.2.2/32 23675 Gi4/1 10.6.6.2
12307 Pop tag 10.5.5.5/32 365 Gi1/0 10.8.8.5