DMVPN

[Robert Plunkett]

Good morning,

If you have a TE core running ospf or ISIS, can the end nodes be configured to run DMVPN?

[balaji.bandi]

i do not see any issue, you looking t to extended that peers over DMVPN ?

[Robert Plunkett]

I configured the tunnels with ospf running over them, however the routes wasn't showing up, but the neighbors are up.

[balaji.bandi]

can you post the configuration, Hope the tunnel interface have point to multipoint config.

example :

https://journey2theccie.wordpress.com/2020/04/21/dmvpn-phase-3-ospf/

[Robert Plunkett]

I can do it later, I am not at that location currently.

[balaji.bandi]

ok post some output to verify why the routers are not learning from neighbour.

[MHM Cisco World]

You run dmvpn over mpls (TE)?

Can I ask why ?

MHM

[Robert Plunkett]

No particular reason, was just testing to see if I could do it.

[MHM Cisco World]

First thing try ping dmvpn tunnel IP using source.

Then try use under opsf neighbor dont use network' this will force ospf use unicast not multicast' it can you have issue of multicast over TE.

MHM

[Robert Plunkett]

Thank you, however when I tried the DMVPN tunnels are up, however none of the routes shows up.

[Robert Plunkett]

Good morning,

I removed ospf from the tunnel interface and replaced it with eigrp and it worked. I am not sure how to explain it.

[MHM Cisco World]

Also the only thing make ospf failed and eigrp success is mtu mismatch.

Run 

ip ospf mtu-ignore

MHM

[Robert Plunkett]

Thank you very much, I did not tried that. I will next time.

[MHM Cisco World]

Take your time 

And try match mtu if you can.

Goodluck 

MHM