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Webcast-Catalyst9k
New Member

problem of proxy-arp

2500-s0-88.1.201.1/16------88.1.201.2/24-s1/0--2611--e0/0--88.1.77.2/24---88.1.77.1/24-f0/42-3550

I can ping from router 2500 to 88.1.77.1 even if I disable proxy-arp of 2611's s1/0.

There isn't any dynamic or static routing except a default route on 3550 to 2611.

I can't understand this. Does I misunderstand the function of proxy-arp ?

thanks!

Regards

Henry

3 REPLIES
New Member

Re: problem of proxy-arp

another related question,

what's the real function of proxy-arp on serial interface ?

Regards

Henry

New Member

Re: problem of proxy-arp

I think 2500 consider 88.1.77.1 is the same subnet with 88.1.201.1/16,so the packet come out of the s0. 2611 receive this packet and it simply transport it to e0/0. 88.1.77.1 receive the packet and reply packet using default route.

New Member

Re: problem of proxy-arp

today I already know why 2500 can ping 88.1.77.1 because proxy-arp doesn't function on serial interface.

so what's the real function of proxy-arp on serial interface ?

Does it work when bridge on the serial interface ?

If bridge on serial interface,how ios transfer arp ? I think there isn't mac address on serial interface . Is there some encapusation to packet the mac and transfer the lan frame through serial interface ?

regards

Henry

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