question about proxy-arp

[iwanthome]

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 ?

another related question,
what's the real function of proxy-arp on serial interface ?
thanks!

Regards
Henry

 

[iwanthome]

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