10-10-2005 06:23 AM - edited 03-03-2019 12:19 AM
WS-C3750G-24TS running
12.2(20)SE4, RELEASE SOFTWARE (fc1).
sho mac-address-table aging-time
Vlan Aging Time
---- ----------
253 300
252 300
254 300
255 300
1 300
251 300
--------
The aging is not working. I can failover some devices I have and the mac-address of the old device associated the the IP never ages out. "Clear arp" makes the standby unit respond to pings and connectivity to the standby unit is 100% after the "clear arp".
Showing the arp cache, I can see the IP associated with the old mac-address and the "age" keeps increasing, not decreasing with the old mac-address.
It also doesn't matter if the Primary unit has been rebooted, switch keeps the old mac-address associated the Primary unit.
Suggestions?
10-14-2005 05:44 AM
bump
10-14-2005 12:14 PM
I think permanent entry should have been made into the arp cache using the "arp ip-address hardware-address type" command.
To remove this arp entry, you can try "clear arp-cache".This will delete all dynamic entries from the ARP table.
for more details, refer the following page:
10-14-2005 02:30 PM
why would I want to make a perm. apr entry? I need the arp cache to "age-out" in 5 mins like my sho command indicates.
The aging-time for my arp table is 5 mins. I need the old mac-address associated with the IP to "age-out" so my new mac-address can be associated with the same IP.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide