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Does arp cache clear when i/f unplugged

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

1 REPLY
Hall of Fame Super Silver

Re: Does arp cache clear when i/f unplugged

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

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