Re: cam timer tuning

When I've seen this in the past, it was usually discrepancy between
host ARP and switch MAC aging timers. Try lowering timers on your
switches to be under/same as the ARP timers on hosts and see if there
are any differences.

--
Marko Milivojevic - CCIE #18427 (SP R&S)
Senior CCIE Instructor - IPexpert
On Fri, Dec 28, 2012 at 1:40 AM, Naufal Jamal <naufalccie_at_yahoo.in> wrote:
> Hello,
>
> We have a pair of nexus 7K's (without vpc) running HSRP and MSTP.
> They are connected to access layer switches 4948's. whenever we bring up a new
> trunk link between Nexus 7K and 4948 we see unicast flooding caused due to
> TCN's. I am wondering if it has something to do with the difference in cam
> aging timer in both the platforms. Nexus (1800 secs) and 4948 (300 secs). can
> anyone put some light here please? I am thinking that changing the aging timer
> on nexus to 300 secs should help.. any thoughts?
>
> Naufal
>
>
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