Hi, guys. It's been a while since I've posted something here but I'm pretty
stumped with this problem somehow. Anyway, here's my problem:
Remote office subnet: 192.168.5.0 255.255.255.0
Plan to change subnet into 192.168.19.0 255.255.255.0
Router relaying dhcp requests to 192.168.1.11 (DHCP Server in Central site)
Current fa0/0 interface on LAN: 192.168.5.1 255.255.255.0
I recently configured the interface to have
192.168.19.1 as its primary address
192.168.5.1 as its secondary address
On the DHCP Server, I've deleted the 192.168.5.0 scope and activated the
192.168.19.0 scope
The reason I have 2 ip addresses on the FastEthernet interface of the router
is to allow people who haven't rebooted their computer to still be able to
access email and services at the central site and print to their local LAN
LPR printers...
The problem I'm having is that once the computers have rebooted, and I did a
debug ip dhcp server events, packets, linkage, I keep seeing the router
still setting the GIADDR of the request as 192.168.5.1 ... since it's
forwarding this information, the DHCP server on the central site wasn't
responding because of the non-existence of the 192.168.5.0 scope
Reading Cisco's documentation, I thought the router uses the primary ip
address of the interface as its GIADDR?
I have read something about ip dhcp smart-relay but I doubt it applies to
this problem...
BTW, this is the way that it should be done and I know a lot of people hate
the "secondary" ip address but I'm really trying to make this change as
transparent to the users as possible!
Thanks guys!
Kenneth
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