I ran into a sort of similar problem a while back with a PIX failover.
Wouldn't ping
until I cleared the arp cache on the router. The ping should have
repopulated the arp
cache but it didn't. Note that the default arp timeout is 4 hours (unlike
most hosts
where it is typically about 10 minutes).
--
Jonathan
NK Sat wrote:
> Hi Everybody,
> I need some help on this issue.. I am having Cisco 3600 router with some
> 16 Class-C connected to the Fast Ethernet as secondary addresses. My host
> were not able to ping the router across the ethernetat all... I was seeing
> the ARP entry of my host on the router but not able to ping the host from
> the router and vice-versa across the ethernet......when i cleared the
> arp-cache everything is working...( Notsure when the trouble may come
> back!!!!) Can somebody tell
> 1) What is the size of the ARP-CACHE, where i can see it and how i can
> manipulate it.
>
> 2) If i have "n" hosts and "n" is the maximum hosts the Arp-cache can
> accomidate when "n+1" host try to get to a host it will send a brodcast and
> get the MAC and get itself into the ARP-Cache removing the oldest entry in
> the ARP right????? Apparently this does NOT seem to be happening...... Is
my
> understanding wrong ???? or is this a weird cisco IOS stuff!!!!! which
needs
> the regular upgrade????
>
> Any help is greatly appreciated.
>
> Thanks
> Satish
>
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