[c-nsp] udld fail ?

[Satish Patel]

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
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