topic Re: Eigrp Route filtering over interface vlan in Routing and SD-WAN

Eigrp Route filtering over interface vlan

ahmed_elemamn — Tue, 28 Aug 2018 20:11:09 GMT

i have a switch that is connected to 2 routers and forming an EIGRP adjacency to both over interface VLAN. is their a way to filter and/or offset some routes to a specific neighbour as when i apply the distribute/offset list directly to the interface VLAN it affects both neighbours

Re: Eigrp Route filtering over interface vlan

Georg Pauwen — Tue, 28 Aug 2018 21:50:26 GMT

Hello,

post the full config of your switch...

The route map refers to an access list. The source portion of the access list is your EIGRP neighbor. So by matching the neighbors, you should be able to filter routes per neighbor...

Re: Eigrp Route filtering over interface vlan

paul driver — Wed, 29 Aug 2018 09:33:27 GMT

Hello

In the eigrp process of the switch you can increase the admin distance of the less preferred eigrp neighbor and specify a acl value which doesnt exist so it will capture all routes being advertised from that peer.

swtich
router eigrp xxx
distance 91 (advertising eigrp router) 0.0.0.0 10

Re: Eigrp Route filtering over interface vlan

ahmed_elemamn — Wed, 29 Aug 2018 09:27:40 GMT

thank you paul, it helped with the inbound routes to the switch to be filtered. is their a way to engineer the outbound traffic as well.

as per the topology below, i need 2.2.2.2 to go through R2 instead of R1 to 1.1.1.1 ( any destination from 2.2.2.2 must go through R2not only 1.1.1.1 ), and 1.1.1.1 to be routed back to 2.2.2.2 through R2 as well

Topology

Re: Eigrp Route filtering over interface vlan

paul driver — Wed, 29 Aug 2018 12:05:19 GMT

Hello

You can use Policy based routing to accomplish this;

Example:
rtr1 = 10.1.123.1
rtr2 = 10.1.123.2
Switch = 10.1.123.100

ip sla 1
icmp-echo 10.1.123.2 source-ip 10.1.123.100
ip sla schedule 1 life forever start-time now

track 10 rtr 1 reachability

access-list 100 permit ip host 2.2.2.2 any

route-map PBR permit 10
match ip address 100
set ip next-hop verify-availability 10.1.123.2 1 track 10

int vlan xx
ip policy route-map PBR