Routing path

[hs08]

Hello,

I have topology like this picture where we have 2 WAN connection to bridge LAN1 and LAN2. We use OSFP for the routing and we have NPM (from solarwinds) to monitor WAN connection from LAN1.

In the NPM i create 2 node with ip 10.100.1.2 and 10.101.1.2 to monitor the WAN connection. The problem is when WAN1 down (top side) when NPM do the ICMP the traffic goes to WAN2 (down side) and because of this the NPM not showing alert even the WAN1 connection is broken.

So should i make static routing for each WAN to make sure path to 10.100.1.2 must via 10.100.1.1?

[Harold Ritter · Accepted solution]

Hi @hs08 ,

You could configure a floating static route to make sure the traffic to 10.100.1.2 will not follow the ospf learnt route. So if the connected route disappears, the traffic to 10.100.1.2 would be dropped. You would also do the same for 10.101.1.2.

ip route 10.100.1.0 255.255.255.252 Null0 5 

ip route 10.101.1.0 255.255.255.252 Null0 5

Regards,

[MHM Cisco World]

The DR have route via

1-direct connect this is health

2-ospf this asymmetrical not health

So as @Harold Ritter mention when direct connection is down we must make DR use lower AD route to null0 instead of using ospf route.

MHM