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Haris P
Enthusiast

ARP issue

Dear al ,

I run debug arp for one interface and im getting below error . The CPU is running high due to this .

I dont have any IP configured as 192.168.0.13 in my interface but the mac address  00d0.2b14.ed00 is that of my router

Mar  5 08:58:08.022: IP ARP req filtered src 192.168.0.13 00d0.2b14.ed00, dst 192.168.0.14 0000.0000.0000 it's our address
Mar  5 08:58:08.022: IP ARP req filtered src 192.168.0.13 00d0.2b14.ed00, dst 192.168.0.14 0000.0000.0000 it's our address
Mar  5 08:58:08.022: IP ARP req filtered src 192.168.0.13 00d0.2b14.ed00, dst 192.168.0.14 0000.0000.0000 it's our address
Mar  5 08:58:08.022: IP ARP req filtered src 192.168.0.13 00d0.2b14.ed00, dst 192.168.0.14 0000.0000.0000 it's our address
Mar  5 08:58:08.022: IP ARP req filtered src 192.168.0.13 00d0.2b14.ed00, dst 192.168.0.14 0000.0000.0000 it's our address

4 REPLIES 4
Reza Sharifi
Hall of Fame Expert

So, the issue is High CPU? If yes, do you have command like this in your config?

ip route 0.0.0.0 0.0.0.0 Fastethernetx/x

There is nothing like  " ip route 0.0.0.0 0.0.0.0 Fastethernetx/x " ,even no other route pointing to interface

Tharak Abraham
Participant

Have you connected a Hub/L2 switch to the router with hosts attached ?

Looks like the frame is looping back to the router since there is no hosts with the dest ip add.

Just a thought though.

Hi,

00d0.2b14.ed00,

is a JETCELL mac it is a mobile phone acquired by cisco and it seems he is doing an arp request for  .0.14 which seems to be the router IP.

Can you do a sh ip int br and a sh cdp nei ?

Regards.

Alain.

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