[c-nsp] cisco 3750 arp timeout

[Matt Bazan]

Hi Chuck,
	In this particular case I've got two 3750's in a stack and
several MS clusters attached (one cluster node plugs into stack member
1, the other node into member 2) and I'm having communication problems
reaching the cluster virtual servers when I 'roll' the resources over
from one node in the cluster to the other.  One of my theories is that
the stack could be having problems with the grat arps it's getting from
the MS cluster.

	As these systems are in our data center I'll have to wait till
the next time I'm over there to put a sniffer on the wire to see if I
can glean more info.

	In the meantime, to attempt to rule out a grat arp issue, I was
trying to get the ciscos to not cache the cluster's virt server IP and
associated MAC.  

  Matt

> -----Original Message-----
> From: Church, Chuck [mailto:cchurch at netcogov.com] 
> Sent: Thursday, January 13, 2005 1:19 PM
> To: Matt Bazan; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] cisco 3750 arp timeout
> 
> Matt,
> 
> 	On a side note, why are you trying to do this?  Rodney mentioned
> the CEF issue.  Are you trying to speed up HSRP/VRRP or 
> something along
> those lines?  Just curious... 
> 
> 
> Chuck Church
> Lead Design Engineer
> CCIE #8776, MCNE, MCSE
> Netco Government Services - Design & Implementation Team
> 1210 N. Parker Rd.
> Greenville, SC 29609
> Home office: 864-335-9473
> Cell: 703-819-3495
> cchurch at netcogov.com
> PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D 
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Matt Bazan
> Sent: Thursday, January 13, 2005 3:23 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] cisco 3750 arp timeout
> 
> I've got a number of interfaces on one of my 3750's (IOS 
> 12.1(11)AX SMI)
> that I've set the arp timeout to be one second.  However, the 
> entries in
> the arp cache continue to show up until the default arp 
> timeout has been
> reached.  It was my understanding that setting the arp timeout per
> interface to 1 would clear these entries after 1 second.  Am I
> misunderstanding how this command works?  If so, is there a command to
> remove entries from the arp cache after 1 second?  Thanks,
> 
>   Matt
> 
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