[c-nsp] ASR920 Interface won't come up

[Shawn L]

James

I have spoken to TAC, but no resolution as of yet.  After getting all of
the pertinent information, my TAC engineer dropped off the face of the
earth for several weeks, then e-mailed me for times to discuss, then went
dark again. I have to say, I'm not impressed.

We've done some debugging on our own, but not goten real far.  We've tried
several reboots of the far-end, and we aren't able to reproduce it or make
it fail.

Shawn


On Sun, May 31, 2020 at 5:34 AM James Bensley <jwbensley+cisco-nsp at gmail.com>
wrote:

> On Tue, 19 May 2020 at 00:22, Shawn L <shawn at rmrf.us> wrote:
> >
> > Had another weird interface issue on a pair of Cisco ASR920 routers.
> > Wondering if anyone has seen something similar before.
> >
> > Both are setup with basic routing, no layer-2 functionality over the
> link,
> > and pretty basic.
> >
> > interface TenGigabitEthernet0/0/4
> >  description Feed
> >  mtu 9189
> >  ip address 10.10.0.37 255.255.255.252
> >  no negotiation auto
> >  mpls ip
> >
> > On the Remote Side
> >  description Remote
> >  mtu 9189
> >  ip address 10.10.0.38 255.255.255.252
> >  no negotiation auto
> >  mpls ip
> >
> > Power went out at the remote site, and the link did not come back up.
> The
> > feed side was reporting the interface was down/down.  When we went to the
> > remote site, it was reporting up/up but could not pass traffic.  A
> shut/no
> > shut of the port on either side didn't seem to have any effect.  Both
> came
> > right back to the same state they were before (remote reporting up, feed
> > reporting down).
> >
> > SFP removal and reinsertion didn't help either.  We then re-provisioned
> the
> > port on the remote side (default interface, copy and paste) and the link
> > came back up and seems to be operating normally.
> >
> > Logs don't show anything interesting either.  Not sure where to go from
> > here.
>
> Hi Shawn,
>
> Did you ever get this resolved? Did you speak to TAC?
>
> There have been a few posts on this list about weird interface
> behavior for ASR920s, which seems to relate to the hidden TCL scripts
> run in the background when interfaces go up/down, change speed, SFPs
> are changed etc.
>
> I'm curious to know if you spoke to TAC and if they related it to the
> same source of problems.
>
> Cheers,
> James.
>