We have 2 networks separated by 3 routers (L3 switches) in parallel via WAN. AFAIK, RIP will load balance on these 3 routes. How do I influence the routes (metric) so that Router-1 is preferred over Router-2 and Router-3? Is it possible? If not, what are the alternative solutions?
WAN-CLOUD (WITH 3 ROUTERS IN PARALLEL)
Sorry for the poor diagram and thanks in advance for any input.
I think the best way would be moving to some more flexible routing protocol (OSPF, EIGRP).
But if you have to stay with RIP, there might be a solution to use policy routing on router A LAN interface with a route-map using set ip next-hop router1 router2 router3 for traffic with destination to the Network B.
An inverse policy routing should be defined on the router B LAN interface.
Check out the offset-list command in rip router config mode. Its not real clear but it keys on the source of the advertisements not the advertisements themselves. It adds cost or hops to routes learned from listed hosts or interfaces. Here's the cco doc description.
To add an offset to incoming and outgoing metrics to routes learned via Routing Information Protocol (RIP), use the offset-list command in router configuration mode. To remove an offset list, use the no form of this command.
Standard access list number to be applied. Access list number 0 indicates all access lists. If offset is 0, no action is taken. For IGRP, the offset is added to the delay component only.
Standard access list name to be applied.
Applies the access list to incoming metrics.
Applies the access list to outgoing metrics.
Positive offset to be applied to metrics for networks matching the access list. If the offset is 0, no action is taken.
(Optional) Interface type to which the offset list is applied.
(Optional) Interface number to which the offset list is applied.
This command is disabled by default.
This command was introduced.
The interface-type and interface-number arguments were added.
The access-list-name argument was added.
The offset value is added to the routing metric. An offset list with an interface type and interface number is considered extended and takes precedence over an offset list that is not extended. Therefore, if an entry passes the extended offset list and the normal offset list, the offset of the extended offset list is added to the metric.
In the following example, the router applies an offset of 10 to the delay component of a router only to access list 21:
offset-list 21 out 10
In the following example, the router applies an offset of 10 to routes learned from Ethernet interface 0:
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.