[c-nsp] VSS

[Harry Hambi]

Hi,
Thanx for your comments.....had a mainenance window early this morning tried to re-create problem with Tac on the line, rebooted the vss pair in question 4 times and could not recreate the prob.
Code version has been disgussed....pobably not the cause.


Rgds
Harry

Harry Hambi BEng(Hons)  MIET  Rsgb

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of chris stand
Sent: 05 July 2013 11:38
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] VSS

I think you are telling us that you have 4 6500s ?
you might want to check the version of IOS on them as you are on real early VSS code

HSRP between 2 pairs ... seems ok, but a rather odd topology .. however I guess I understand it ... you absolutely, 100% + need packets to route,  you are treating each VSS pair as a single router.

Yes, the links between individual VSS members can be odd, L2 &/or L3 any chance you can provide a simple topo ? even if drawn on whiteboard




   1. Re: VSS (Mackinnon, Ian)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 3 Jul 2013 15:35:50 +0000
> From: "Mackinnon, Ian" <ian.mackinnon at atos.net>
> To: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net>
> Subject: Re: [c-nsp] VSS
> Message-ID:
>         <
> 8EA235F42C39DF45B871CA1489A9045D030945 at DEFTHW99EX1MSX.ww931.my-it-solu
> tions.net
> >
>
> Content-Type: text/plain; charset="us-ascii"
>
> Not really relevant to the problem, but why are you running HSRP
> between 2 separate VSS instances?
> Surely most of the point of VSS is it removed spanning trees and the
> need for HSRP, and you are now spreading vlans overs 2 switches again,
> giving you the potential for spanning tree again Why are you using
> VSS? What benefit is it giving you in this setup?
>
> Ian
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf
> Of Painting, Stuart
> Sent: Wednesday, July 03, 2013 4:17 PM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] VSS
>
>
> Me, I'd be checking ingress and/or egress ACLs on the surviving links.
> With vss1 switched off, traffic may be taking an "unusual" path to vss2.
>
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf
> Of Harry Hambi
> Sent: 03 July 2013 15:35
> To: 'cisco-nsp at puck.nether.net'
> Subject: [c-nsp] VSS
>
> Hi All,
> We have two vss pairs , lets call them vss 1, vss 2. Vss 1 was turned
> off in order to test HSRP capabilities, this made vss 2 the active
> router for several vlans. We found the follwing issues:
> Loopback address & HSRP address on vss 2 were not contactable. Vss 2
> was forwarding traffic. Could this be a management plane issue, hardware?.
> Vss pairs running 12.2.(33) sx14
>
> Rgds
> Harry
>
> Harry Hambi BEng(Hons)  MIET  Rsgb
>
>
>
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