THanx for the response. Also there is a ip directed-broadcast command on the Ethernet 0/0 interface. WHat is the use of this command?? And will that effect the router if i remove it?

Iam using IOS version Version 12.2(17a).

Awaiting your reply.

PLease reply to the Query. Would highly appreciate that.

The ip directed-broadcast command enables forwarding of directed broadcast. For example if a router interface had 172.16.4.1 255.255.255.0 and received a packet addresses to 172.16.4.255 that would be a directed broadcast. Should the router forward this onto the local subnet as a broadcast? In current versions of IOS the forwarding of directed broadcasts is disabled by defualt. This command enables forwarding of directed broadcasts.

Directed broadcast has some implications from a security perspective and in general I believe that disabling directed broadcasts is appropriate in most networks. There are some situations where you may need this functionality. So the command is there to enable it.

I would not expect directed broadcast to have much impact on the router. It might have more impact on the stations on the LAN interfaces which may see an increase in broadcast traffic.

HTH

Rick