09-27-2007 01:59 PM - last edited on 03-25-2019 03:16 PM by ciscomoderator
Is is possible to set up a second ip helper address on cisco routers as a backup should the primary dhcp server be down?
09-27-2007 02:06 PM
Yes. B'casted packets will be duplicated and routed to all helper addresses.
09-27-2007 02:08 PM
But if the request are duplicated I would be handing out address's at 2 locations?
09-27-2007 02:17 PM
Yes, if you want. Some network has so complicated helper hierarchies that spanning-tree is needed to not duplicate paths. Apparently IOS can do that.
09-27-2007 08:14 PM
Hi James
Just to add to Paolo's points. Rather than think of active and backup DHCP servers just think of both DHCP servers being active. You can split the scope across your 2 DHCP servers so one serves out the first half of the scope and the other serves out the second half of the scope.
Jon
09-28-2007 06:45 AM
Sometimes the best ideas are the simplest. None of the remotes have more than 15 people so all I need to do is give a 100 to one DHCP and 100 to the other server and I'm covered with plenty to spare.
Thanks!
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide