[c-nsp] MPLS Issue

[Steven Saner]

On Nov 9, 2010, at 11:54 AM, David Freedman wrote:

>
>> Before I enable mpls:
>>
>> Router A#sho mpls forwarding-table 10.160.0.140
>> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
>> tag    tag or VC   or Tunnel Id      switched   interface
>> 72     Untagged    10.160.0.0/16     0          Se6/0       
>> point2point
>>
>> Router B#sho mpls forwarding-table 207.178.96.65
>> Local  Outgoing      Prefix            Bytes Label   Outgoing    
>> Next Hop
>> Label  Label or VC   or Tunnel Id      Switched      interface
>> 67     No Label      207.178.96.64/26  0             Se6/0       
>> point2point
>>
>> After I enable mpls and can no longer ping
>>
>> Router A#sho mpls forwarding-table 10.160.0.140
>> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
>> tag    tag or VC   or Tunnel Id      switched   interface
>> 72     45          10.160.0.0/16     511928     Se6/0       
>> point2point
>>
>> Router B#sho mpls forwarding-table 207.178.96.65
>> Local  Outgoing      Prefix            Bytes Label   Outgoing    
>> Next Hop
>> Label  Label or VC   or Tunnel Id      Switched      interface
>> 67     39            207.178.96.64/26  0             Se6/0       
>> point2point
>
> Interesting nothing is being counted in the reverse direction from  
> rtrB
> back to rtrA, can you confirm unidirectional ICMP with "debug ip icmp"
> on one of the targets?

I may have to try this during an off peak time as this circuit is in  
use for real traffic.


>
> What IOS versions are you running on both of these? I can see a
> difference in the output (tag switching vs label switching) here.

They are different. One is:

Cisco IOS Software, 7200 Software (C7200-PK9U2-M), Version 12.4(25c),  
RELEASE SOFTWARE (fc2)

The other is:

Cisco IOS Software, 7200 Software (C7200P-ADVIPSERVICESK9-M), Version  
12.4(24)T2, RELEASE SOFTWARE (fc2)

Steve

--
---------------------------------------------------------------
Steven Saner
steve at saner.net