routing

[carl_townshend]

Can anyone tell me will I have problems routing from the 172.30.x.x/16 to the 172.30.24.x/24 network , will the 172.30/16 look locally for the /24 subnet ?

[Anand Narayana]

unless 172.30.x.x/16(172.30.0.0 - 172.30.255.255) has an ip 172.30.24.x/16, there won't be ant problems using 172.30.24.x/24.

[eric_chan]

well... assuming all routing protocol are working properly.. you will need to enable proxy arp on the 172.30.x.x/16 routing interface...

when a host from the 172.30.x.x/16 wants to send traffic to 172.30.24.0/24, the host won't send it to its default gateway right the way because it think 172.30.24.0 is within its own broadcast domain. It will send an ARP request to its local subnet first.

With proxy arp enabled, the 172.30.x.x/16 routing interface will respond to the ARP request with its MAC address... then the host to start forwarding the packets destined to 172.30.24.0/24 to 172.30.x.x/16 routing interface.

HTH.

Eric