Does arp cache clear when i/f unplugged

[MARK HEUZENROEDER]

Hi,

Does IOS automatically clear the arp cache, fast-switching cache and route cache for all IP addresses in a particular subnet if the router interface on that subnet is unplugged, or do I need to do,

clear arp interface <type> <number>

and

clear arp-cache

as is shown at,

http://www.cisco.com/en/US/docs/ios/12_4/ip_addr/configuration/guide/ipb_arp_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1096656

Thanks, MH

[Richard Burts]

MH

If you unplug the router interface and if the router interface then goes to line protocol down, then the ARP cache entries associated with that interface should be cleared.

HTH

Rick