[c-nsp] Brainstorming for troubleshooting

[Gehring Kai]

What sup and ios are you running?
Is there anything involved which uses virtual mac addresses? Like HSRP or some HA-Cluster or whatever? If yes I'd sniff that traffic and look for things like gratuitous arp packets and likewise...

Your Problem sounds to me like the traffic is being sent to the wrong mac address until the timer runs out and the box learns the correct address again.

Kai

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of R S
Sent: Wednesday, December 18, 2013 7:16 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Brainstorming for troubleshooting

I’ve some c6509 in my DC environment and I sometimes experience a loss of traffic for 8 minute, different vlan, both l2 or l3 traffic, different firewall…
 
The only point everytime traversed by the traffic flows is the DC environment made by Cisco device 6509.
 
The other common strage item is that we’ve “mac-address-table aging-time 480”, equal to the 8 minutes of hole...
 
We’ve involved Cisco TAC but they do not find anything strange…
 
I’m here to hear any strange idea, similar problems, etc…. that I can try to follow in my troubleshooting that is currently a nightmare...
 
tks 		 	   		  
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