[c-nsp] 6500 - What determines whether certain traffic is punted or not?

[Drew Weaver]

Hi,

No HSRP, VRRP or GLBP on this box.

#sh mac-address-table aging-time
Vlan    Aging Time
----    ----------
Global  300
no vlan age other than global age configured

Routed MAC aging time: 300 seconds

This is on our core, though so there are no hosts connected here.

-Drew


-----Original Message-----
From: Matthew Huff [mailto:mhuff at ox.com] 
Sent: Tuesday, November 24, 2009 1:41 PM
To: Drew Weaver; 'Lee'
Cc: Cisco-nsp
Subject: RE: [c-nsp] 6500 - What determines whether certain traffic is punted or not?

Are you using first-hop redundancy like hsrp, glbp, vrrp? This can cause asymmetrical MAC based FIB timeouts which leads to unicast flooding. I didn't think these were RP switched, but it could be.

If so, what is your setting for "mac-address-table aging-time" ? We have ours set > fib timeout...so:


mac-address-table aging-time 14400


----
Matthew Huff       | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
http://www.ox.com  | Phone: 914-460-4039
aim: matthewbhuff  | Fax:   914-460-4139


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Drew Weaver
Sent: Tuesday, November 24, 2009 1:21 PM
To: 'Lee'
Cc: Cisco-nsp
Subject: Re: [c-nsp] 6500 - What determines whether certain traffic is punted or not?

Hi Lee,

I believe you're referring to show 'platform hardware capacity' and nothing looks extremely out of the ordinary.

-Drew

From: Lee [mailto:ler762 at gmail.com]
Sent: Tuesday, November 24, 2009 1:14 PM
To: Drew Weaver
Cc: Cisco-nsp
Subject: Re: [c-nsp] 6500 - What determines whether certain traffic is punted or not?


On Tue, Nov 24, 2009 at 1:03 PM, Drew Weaver <drew.weaver at thenap.com<mailto:drew.weaver at thenap.com>> wrote:
Hi,

Yeah I followed the exact same instructions you posted when creating the RP span session.

Well.. it was worth a shot :)
Have you seen any syslog messages about a fib or tcam table overflow?  Someone else will have to chime in with the show commands to see hardware resource utilization - I'm not at work & don't remember what they are.  Sorry..

Lee


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