[c-nsp] udld fail ?

Satish Patel satish.txt at gmail.com
Tue Jun 7 07:38:02 EDT 2016

We have two cisco 3850 switch connected over 10g with udld enabled and recently we upgrade one of switch and as soon as switch reload it put 10g link in err-disable mode, if I disable udld it works. 

Any idea what would be wrong?

Sent from my iPhone

> On Jun 6, 2016, at 5:25 PM, Nick Hilliard <nick at foobar.org> wrote:
> james list wrote:
>> Since i have also lacp fast configured, should it detect any possible
>> issue before udld?
> yes, by definition it will, because udld will not interoperate between
> ios and junos.  If you want to detect unidirectional link failures
> between ios and junos where you're using l2 only (i.e. no
> ospf/isis/etc), lacp is the only game in town.
>> And should it be reported in a syslog message both on cisco ios or junos?
> on the cisco side, you'll get a link up/down notification because the
> line protocol will drop.  On the junos side, you can get whatever
> logging messages you want, but you will need to configure them in
> traceoptions.
> Nick
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

More information about the cisco-nsp mailing list