[c-nsp] nx-os ssh connection startup delay ?

[Tóth András]

Hi Jeffrey,

As Chuck highlighted this could be due to a delay reaching the AAA server.

I would also try disabling DNS lookups with "no ip domain-lookup" because
when SSH is established the reverse record for the IP might be requested
causing a delay.

You could also do an ethanalyzer capture in the main vdc in one session
while doing an SSH connection to the N7k and check what's happening.

Best regards,
Andras



On Mon, Mar 11, 2013 at 4:55 PM, Jeffrey G. Fitzwater
<jfitz at princeton.edu>wrote:

> cisco 7k 6.1.2
>
> We are seeing delays when ssh-ing to system just before the banner page
> comes up.
>
> Once session is up we see no delay.
>
>
> It has become very consistent when we log-in recently and the delay is
> always just before the banner is displayed.
>
>
>
> Debugging of the SSH session at client end just shows an approx 10 sec
> pause just before the banner is displayed.
>
>
> I would like to debug at the nx-os end but I cannot find the correct
> commands.
>
>
>
> Has anybody seen this delay issue or know the correct DEBUG commands for
> SSH?
>
>
>
> Thanks for any help…
>
>
>
> Jeff Fitzwater
> OIT Network Systems
> Princeton University
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