controlling broadcast with helper-address on 3550 switch

From: sebastan bach (sebastan.bach@gmail.com)
Date: Thu May 31 2007 - 22:10:24 ART


hi all

here;s my scenario

SW1 has a host on vlan 10 and SVI vlan 10 with ip add 10.1.1.1/24.

the host is set to choose ip address automatically from dhcp server.

i have ios router as dhcp server on vlan 20

SVI vlan 20 has ip add 20.1.1.1 and dhcp server as 20.1.1.2

on the SVI of vlan 10 i have set the helper-address to 20.1.1.2 of the dhcp
server.

my hosts are getting the ip address from the server .

my doubt is since in the switch we can only specify the helpder-address
command .

it means all the broadcast on the vlan 10 will be converted and send as a
unicast packet to the dhcp server also .

how can i control it say only the dhcp broadcast packets should be converted
to unicast and send to the dhcp server.
no other other broadcast should be unicast and send to the dhcp server.
is this possible

has anyone tried this before.

waiting for some reply.

regards

sebastan



This archive was generated by hypermail 2.1.4 : Fri Jun 01 2007 - 06:55:23 ART