[c-nsp] EoMPLS between C7206 and C3845

[Rodney Dunn]

Can you load 12.4(15)T6 on the 3845?

There was a bug with L2TPV3 where the interface didn't go
in to promiscous mode to accept the frames so it would
look like a one way PW.

Check 'sh ip int' or 'sh controller' on the 3845.

The outging interface does look odd too.

Rodney

On Thu, Aug 07, 2008 at 02:15:37AM +0600, Junaid wrote:
> Hi,
> 
> I am trying to make EoMPLS (VLAN mode) to work between a 7206VXR
> (NPE400) running c7200-jk9s-mz.123-21.bin and a 3845 running
> c3845-advipservicesk9-mz.124-15.T.bin. These two PE routers are
> connected back-to-back via FastEthernet. The customers are connected
> via a switch connected to each PE:
> 
> CE1 --- Switch --- PE1 --- PE2 --- Switch --- CE2
> 
> The control place comes up without any issue:
> 
> C7200-PE1#sh mpls l2transport vc de
> Local interface: Fa0/0.3 up, line protocol up, Eth VLAN 3 up
>   Destination address: XXXXX (loopback ip of PE2), VC ID: 100, VC status: up
>     Next hop: XXXXXX (ip of PE2's interface connected with PE1)
>     Output interface: Fa3/0, imposed label stack {234}
>   Create time: 04:55:52, last status change time: 04:22:07
>   Signaling protocol: LDP, peer XXXXX (loopback ip of PE2):0 up
>     MPLS VC labels: local 2207, remote 234
>     Group ID: local 0, remote 0
>     MTU: local 1500, remote 1500
>     Remote interface description: MPLS TEST
>   Sequencing: receive disabled, send disabled
>   VC statistics:
>     packet totals: receive 658, send 558
>     byte totals:   receive 61117, send 57759
>     packet drops:  receive 0, send 0
> 
> 
> C3845-PE2#sh mpls l2transport vc de
> Local interface: Gi4/0.3 up, line protocol up, Eth VLAN 3 up
>   Destination address: XXXXX (loopback ip of PE1), VC ID: 100, VC status: up
>     Next hop: XXXXXX (ip of PE1's interface connected with PE2)
>     Output interface: Gi0/0, imposed label stack {2207}
>   Create time: 05:06:06, last status change time: 04:42:00
>   Signaling protocol: LDP, peer XXXXX (loopback ip of PE1):0 up
>     MPLS VC labels: local 234, remote 2207
>     Group ID: local 0, remote 0
>     MTU: local 1500, remote 1500
>     Remote interface description: MPLS test
>   Sequencing: receive disabled, send disabled
>   VC statistics:
>     packet totals: receive 807, send 697
>     byte totals:   receive 81235, send 63925
>     packet drops:  receive 0, seq error 0, send 0
> 
> 
> But the data plane is having severe issue. I cannot ping end-to-end
> from the CEs. It seems that when I ping CE1 from CE2 (i.e. from the CE
> connected to 3845), ARP works and I am able to send a ping packet to
> CE1. But CE1 never receives it. On the other side, CE2  does not get
> replies to its own ARP requests. Once I statically bind the mac
> address of CE2 on CE1, CE1 sends an ICMP packet to CE2 and CE2 replies
> to it but CE1 never receives the reply. It seem that the communication
> is one way, from CE1 (one behind C7206) to CE2 (one behind C3845) and
> not the other way round. I replaced C3845 with C7206 and there was not
> issue in the data plane.
> 
> My question is with the IOS I used for C3845, is EoMPLS not supported
> on it? As per Cisco's documentation, EoMPLS is supported on the IOS I
> used for C3845. Any one any experience in running EoMPLS on C3845?
> 
> Another thing I noted was in the following output from C3845, it shows
> MRU=0 and also there was no outgoing interface attached:
> 
> C3845-PE2#sh mpls forwarding-table labels 234 detail
> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
> tag    tag or VC   or Tunnel Id      switched   interface
> 234                l2ckt(100)        50732      none       point2point
>         MAC/Encaps=0/0, MRU=0, Tag Stack{}
>         No output feature configured
> 
> While on C7206, the output was as it should be:
> 
> C7200-PE1#sh mpls forwarding-table labels 2207 detail
> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
> tag    tag or VC   or Tunnel Id      switched   interface
> 2207   Untagged    l2ckt(100)        55853      Fa0/0.3    point2point
>         MAC/Encaps=0/0, MRU=1500, Tag Stack{}
>         No output feature configured
> 
> 
> Any explanations/solutions?
> 
> 
> 
> Regards,
> 
> Junaid
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