[c-nsp] IOS 12.2(33)SRB2 clear arp-table

[Rodney Dunn]

Get a sniffer trace or debug arp.

We refresh every 3 hrs 59 min unless you have tuned the
arp timeout value.

That is a unicast arp to each arp entry and it resets the timer.

Nothing to worry about.

If you are losing the arps for some other reason a sniffer trace
is the way to go.


On Fri, Mar 07, 2008 at 10:40:07AM -0500, Jeff Fitzwater wrote:
> There are two things that the router does with its arp table...
> 1 It clears each hosts arp entry at some age interval, which can be  
> changed.
> 2 It periodically updates its arp-cache by sending out a unicast arp  
> for each arp entry it has.
> 
> The periodic refresh might be what you are seeing.
> 
> 
> Without more details that's all I know.
> 
> 
> Jeff Fitzwater
> OIT Network Systems
> Princeton University
> On Mar 7, 2008, at 10:27 AM, Andrey O.Sokolov wrote:
> 
> >
> >
> >    Good day!
> >
> >    I have cisco7606 with sup32, IOS 12.2(33)SRB2, c7600s3223_rp- 
> > ADVIPSERVICESK9-M
> >
> >    Periodically (sometimes time some minutes) spontaneously cleared  
> > arp-table on this device, and I have
> >    big broadcast flow on my network.
> >
> >    What is this?
> >    Could someone help me solve this problem?
> >
> > -- 
> > _______________________________________________________________
> >    WBR,
> > ***AOS224-RIPE***                   mailto:arctic at alkar.net
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