[j-nsp] l2circuit down one side/up another

[Caio]

Hi Rafael,

Thanks for your help.
I have tried using explicit-null as it's a point-to-point (PE-to-PE) and as
there is no need for PHP, and it has worked as expected (the l2circuits
came up) but afterwards I have replaced the whole router to a better one
and the tunnels came up even without explicit-null set.
The physical path still the same, passing through LS SW (1) and LS SW (2).

So I could not know what went wrong with the previous router and as it's a
production environment, I don't think I could obtain permission test this
circuit ever again. So I think my doubt will last..

Cheers,
Caio


On Sat, Oct 21, 2017 at 7:53 AM, Rafael Ganascim <rganascim at gmail.com>
wrote:

> Just more checks:
>
> How is the MPLS forwarding table for the negotiated Labels for loopback
> and l2circuit?
> Are you using label PHP? Can you switch It off?
> Is the LDP adjacency up and exchanging labels?
> Are the l2circuit neighbors configured between loopback interfaces?
>
> Regards,
>
>
>
>
> Em 20 de out de 2017 8:26 AM, "Caio" <caiot5 at gmail.com> escreveu:
>
>> Hello people,
>>
>> There's a weird problem I would like to share with you.
>> I have the following scenario:
>>
>> MX104 -> L2 SW (1) -> L2 SW (2) -> MX80
>>
>> Both L2 SW are Extreme X460 and they're doing nothing except forwarding
>> frames at layer 2.
>>
>> In order to simplify our topology, we have changed the MX104 uplink to L2
>> SW (2) so the topology went to MX104 -> L2 SW (2) -> MX80.
>>
>> After that, the BGP sessions went up and all the traffic has returned as
>> expected, however I have three l2circuit connections (vlan-ccc mode) and
>> they went to "Down (OL)" status at one side and Up at another. In order to
>> reestablish them we had to do a rollback of the physical changes we did.
>>
>> As it just don't make any sense to me, I summon you experts to help me
>> with
>> that, so we can try to figure out what went wrong.
>>
>> Additional details: I'm using LDP signaling at both sides. It' a point to
>> point L3 connection, so I have the loopback interfaces configured at both
>> sides and a /30 between them, also I have static routes to reach their
>> loopback interface's addresses.
>>
>> Any help will be appreciated.
>>
>> Cheers,
>> Caio
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>