[nsp] ARP errors!!!!

[Sam Stickland]

Is another router on an attached interface running proxy-arp?

james at thehamptonfamily.us wrote:
> My router is suddenly entering into its arp table address from other
> subnets that it has no interfaces in.
> 
> TLTOLOH-6400-0-NRP1#show ip arp
> Protocol  Address          Age (min)  Hardware Addr   Type   Interface
> Internet  209.45.x.x          26   0010.5a11.0f0f  ARPA  
> FastEthernet0/0/0 Internet  209.45.x.1x           1   00c0.7b6f.7466 
> ARPA  FastEthernet0/0/0 Internet  209.45.x.2x          0  
> 0003.fed5.8000  ARPA   FastEthernet0/0/0 Internet  209.45.x.3x       
> 26   0010.5a11.0f0f  ARPA  FastEthernet0/0/0 
> 
> I dont have any interfaces virtual or otherwise in that range on this
> router. It is causing random outages and some customers cant get
> email,etc.
> 
> !!debug output.
> 
> TLTOLOH-6400-0-NRP1#debug arp
> ARP packet debugging is on
> TLTOLOH-6400-0-NRP1#
> May 25 12:37:48: IP ARP: rcvd req src 209.45.a.x 00d0.b7e8.7ff7, dst
> 209.a.y FastEthernet0/0/0
> May 25 12:37:48: IP ARP: rcvd req src 64.254.b.x 0003.fed5.8000, dst
> 64.254.b.y FastEthernet0/0/0
> May 25 12:37:49: IP ARP: rcvd req src 65.170.c.x 00a0.0cc7.5cb2, dst
> 65.170.c.y FastEthernet0/0/0
> May 25 12:37:51: IP ARP: rcvd req src 65.170.c.x 00a0.0cc7.5cb2, dst
> 65.170.c.y FastEthernet0/0/0
> May 25 12:37:51: IP ARP: rcvd req src 64.254.b.x 0003.fed5.8000, dst
> 64.254.b.y FastEthernet0/0/0
> May 25 12:37:52: IP ARP: rcvd req src 209.45.a.x 0003.fed5.8000, dst
> 209.45.a.y FastEthernet0/0/0
> May 25 12:37:55: IP ARP: rcvd req src 64.254.b.x 0003.fed5.8000, dst
> 64.254.b.y FastEthernet0/0/0
> May 25 12:37:55: IP ARP: rcvd req src 65.170.c.x 00a0.0cc7.5cb2, dst
> 65.170.c.y FastEthernet0/0/0
> May 25 12:37:57: IP ARP: rcvd req src 209.45.a.x 0003.fed5.8000, dst
> 209.45.a.y FastEthernet0/0/0
> May 25 12:37:58: IP ARP: rcvd req src 64.254.b.x 0003.fed5.8000, dst
> 64.254.b.y FastEthernet0/0/0
> 
> I cant figure out why my router is recieving and entering these
> requests? It started out of nowhere.
> 
> James
> 
> 
> 
> 
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