GIADDR and secondary ip address problem. [7:6568]
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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6568&t=6568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: GIADDR and secondary ip address problem. [7:6568]
Try to create two subinterfaces the fa0/0 (fa0/0.1 and fa0/0.2)and place the ip helper 192.168.1.11 command on both subinterfaces. Hope that work, good luck. Mark, -Original Message- From: Kenneth [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 30, 2001 9:34 PM To: [EMAIL PROTECTED] Subject: GIADDR and secondary ip address problem. [7:6568] 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6615&t=6568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: GIADDR and secondary ip address problem. [7:6568]
I wish the solution is this easy but you can't create 2 subinterfaces and create 2 ip addresses on those because they have to be encapsulated. Since I'm not using any form of trunking, there is no way I can use 2 subinterfaces with 2 ip addresses. Thanks for the try though. ""Liang Mark J Civ AFRL/PROI"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Try to create two subinterfaces the fa0/0 (fa0/0.1 and fa0/0.2)and place the > ip helper 192.168.1.11 command on both subinterfaces. > > Hope that work, good luck. > > Mark, > > -Original Message- > From: Kenneth [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, May 30, 2001 9:34 PM > To: [EMAIL PROTECTED] > Subject: GIADDR and secondary ip address problem. [7:6568] > > > 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6668&t=6568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
