[c-nsp] Strange Problem

[Rodney Dunn]

Or better yet, use a sniffer to find out which direction
and where the pings are dropping.  Then focus on that
box as Chris said.

Rodney

On Wed, Sep 01, 2004 at 10:29:34AM -0400, christopher_a_kane at bankone.com wrote:
> I'll take a stab: Some sort or arp or cacheing problem. Next time, rather 
> than rebooting, clear the arp cache/cam table.
> 
> -chris
> 
> 
> 
> 
> 
> Christopher A Kane
> 
> "Alexandra Alvarado" <aaaa at telconet.net>
> Sent by: cisco-nsp-bounces at puck.nether.net
> 09/01/2004 10:11 AM
>  
>         To:     <cisco-nsp at puck.nether.net>, "Alexandra Alvarado" 
> <aaaa at telconet.net>
>         cc: 
>         Subject:        [c-nsp] Strange Problem
> 
> 
> Hello,
> 
> Until now this problem with no explanation has been ocurred 6 times:
> 
> Network Diagram
> ---------------
> 
> Cisco 7513  --- (eth0) Main Linux (eth1) --- Clients
>  
> 
> The network has Switches Cisco 3550 in the Backbone, suddenly in any hour 
> one of my clients (I'm going to call it Client A) loss comunication to the 
> cisco router 7513, all others clients are ok, but the client A remains 
> down. I can see the next:
> 
> 1.- From devices that belongs to de same network no problem
> 2.- I saw the correct mac address learned in the port switch where 
> directly is connected the Client A
> 3.- I saw the correct Client A mac address learned in the eth1 Main linux
> 
> It's like the linux loss the routing capacity of only one ip address from 
> de network (it's strange)
> 
> Until now the problem solves when I reboot the switch 3550 near of the 
> client with the problem, but today I reboot linux and the problems solves 
> too
> 
> My question is:  What is the real problem?, and how could I resolve it?.
> 
> 
> Thanks for your help!
> 
> 
> Alexandra Alvarado
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