[c-nsp] Cisco 800 stops forwarding layer 3 via switchport

[n00dles at nix-jutsu.net]

On Tuesday, 10 November 2009 at K:13:13 -0600, Jesse Alexander wrote:
> I have seen this issue happen with a customer 800 series, and I think there
> were just too many IP's for it to handle.  If I remember correctly, they
> were using an 871.  In my case, we think it couldn't handle a /22 (I think
> it was a /22, it was a couple of years ago).  
Each site of which there a large number(a chain of hotels) each has a
/27, we are currently seeing the issue on 10-15 sites randomly. I'm
doubtful that the kit is unable to handle the load.

> The customer would be fine for a period of time (a few hours or less), then 
> would not be able to reach the world until they rebooted it.  Because we 
> didn't manage the 800, we had no visibility to it, so I cannot tell you 
> the specific reason.  Because the issue went away after he customer 
> upgraded their hardware, we can only assume that the 800 was insufficient 
> for their needs.
Our customer wont consider swaping kit out, your experiance sounds more
advanced than ours we are only seeing the issue sporadicly.

> 
> -Jesse
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> n00dles at nix-jutsu.net
> Sent: Tuesday, November 10, 2009 10:43 AM
> To: cisco-nsp at puck.nether.net
> Cc: networks at timico.net
> Subject: Re: [c-nsp] Cisco 800 stops forwarding layer 3 via switchport
> 
> Hello all,
> 
> We have a strange issue between PIX 501's running 6.3(5) and our 800 series
> routers, we are using verious 800s(857/877) with a spread of IOS versions. 
> The problem manifests itself as a drop of connectivity between the two
> devices, that being we lose layer 3 forwarding out of the switch-port
> module on the 800.
> 
> We are of the opinion we have ethernet connectivity between devices as
> the mac-address table is being populated after being cleared, and
> linkstate show up/up but we cannot ping, nor can the device ARP for 
> the PIX. 
> 
> Static ARP entrys also no not fix the issue, the only way we have found
> so far to fix the problem is to reboot the 800.
> 
> Has anyone experienced this kind of problem before?
> 
> Regards
> 
> -- 
> 								_
> Chris Nicholls				 ASCII ribbon campaign ( )
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