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Packet drops on S50N using VRRP

 

 

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skhosla at neutraldata

Jul 9, 2010, 9:32 AM

Post #1 of 3 (2313 views)
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Packet drops on S50N using VRRP

Has anyone else seen this behaviour:



A pair of S50N's running VRRP to a host.



When I try to write the config to the switch, it drops about 4 seconds
worth of packets while it is writing.



Seems odd, not sure if there are some timers or something else I can
tune to eliminate this behaviour.


Anyone have any ideas?



Thanks

Sameer Khosla

Managing Director

Neutral Data Centers Corp.

416 682 3434 x5002 (w)

416 682 3435 (f)


lists at beatmixed

Jul 9, 2010, 2:09 PM

Post #2 of 3 (2184 views)
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Re: Packet drops on S50N using VRRP [In reply to]

I've seen a similar issue. In my case, LACP keep alives get dropped
and port channels go bye-bye during a write mem. It's not always
reproducible but it is definitely an issue.

There's a PR #79439 which is fixed in 8.3.1.3 (S series).

It's a guess, but you may try to get 8.3.1.3 installed and see if it helps.

-M

On Fri, Jul 9, 2010 at 9:32 AM, Sameer Khosla <skhosla [at] neutraldata> wrote:
> Has anyone else seen this behaviour:
>
>
>
> A pair of S50N's running VRRP to a host.
>
>
>
> When I try to write the config to the switch, it drops about 4 seconds worth
> of packets while it is writing.
>
>
>
> Seems odd, not sure if there are some timers or something else I can tune to
> eliminate this behaviour.
>
> Anyone have any ideas?
>
>
>
> Thanks
>
> Sameer Khosla
>
> Managing Director
>
> Neutral Data Centers Corp.
>
> 416 682 3434 x5002 (w)
>
> 416 682 3435 (f)
>
>
>
> _______________________________________________
> force10-nsp mailing list
> force10-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/force10-nsp
>
>
_______________________________________________
force10-nsp mailing list
force10-nsp [at] puck
https://puck.nether.net/mailman/listinfo/force10-nsp


awaite at tuenti

Jul 10, 2010, 2:50 AM

Post #3 of 3 (2186 views)
Permalink
Re: Packet drops on S50N using VRRP [In reply to]

We've run into the "LACP restarts during a write mem" bug too, and it
prevented us from upgrading beyond FTOS 7.7.1.1 for a long time.

I can report that this particular bug has been fixed in the latest versions,
and we are now running on 8.3.1.x, with no real problems after several
weeks.

Sameer, I'd suggest upgrading to the latest code, and see if the problem
still exists.

Adam Waite
Network Engineer
Tuenti Technologies


On Fri, Jul 9, 2010 at 11:09 PM, Matt Hite <lists [at] beatmixed> wrote:

> I've seen a similar issue. In my case, LACP keep alives get dropped
> and port channels go bye-bye during a write mem. It's not always
> reproducible but it is definitely an issue.
>
> There's a PR #79439 which is fixed in 8.3.1.3 (S series).
>
> It's a guess, but you may try to get 8.3.1.3 installed and see if it helps.
>
> -M
>
> On Fri, Jul 9, 2010 at 9:32 AM, Sameer Khosla <skhosla [at] neutraldata>
> wrote:
> > Has anyone else seen this behaviour:
> >
> >
> >
> > A pair of S50N's running VRRP to a host.
> >
> >
> >
> > When I try to write the config to the switch, it drops about 4 seconds
> worth
> > of packets while it is writing.
> >
> >
> >
> > Seems odd, not sure if there are some timers or something else I can tune
> to
> > eliminate this behaviour.
> >
> > Anyone have any ideas?
> >
> >
> >
> > Thanks
> >
> > Sameer Khosla
> >
> > Managing Director
> >
> > Neutral Data Centers Corp.
> >
> > 416 682 3434 x5002 (w)
> >
> > 416 682 3435 (f)
> >
> >
> >
> > _______________________________________________
> > force10-nsp mailing list
> > force10-nsp [at] puck
> > https://puck.nether.net/mailman/listinfo/force10-nsp
> >
> >
> _______________________________________________
> force10-nsp mailing list
> force10-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/force10-nsp
>

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