View Full Version : Multiple routes to endpoint on RIP
rebel2234
06-24-2009, 07:19 AM
What would happen it a person had a parallel link (for backup) and both of those links were speaking rip? Would the packets going out and coming in just come over one link or the other randomly?
If there are multiple paths to any given end-point, RIP will not behave at all, if it even decides to route at all. If you have links such as this, you need to use OSPF or OLSR.
Beebe
06-24-2009, 08:27 AM
I think it's just the default route that RIP has a problem with, so you can still run RIP if you put in some static default routes. Just redistribute gateway from one end of the network and put some static default routes in to route some traffic through the other link.
But yes, ideally run OLSR or OSPF. Especially if you have any loops in the network.
Thanks,
Roger
It's not the gateway that is the issue, but the distribution of routes for the upstream systems. If there is a loop, then it will cause undefined network behavior, most of the time RIP just refuses to advertise any upstream routes, even if they are not part of the looped network segment.
Beebe
06-24-2009, 08:38 AM
Tony is correct, RIP easily gets confused with multiple paths so basically it can't handle loops or multiple gateways. Our network doesn't currently have any loops. It has two gateways though and we use RIP.
I was just saying if you only redistribute one of the two gateways you could statically route out of the other gateway or use policy routing. As far as RIP is concerned there would only be one default route. So there wouldn't be any confusion for RIP.
The reason we do this is we have two APs still running version 2 on wrap boards. Once we upgrade to v3 we'll use OLSR. I'm not sure why the OP wants to run RIP, but he may have a similar reason.
Thanks,
Roger