05-12-2005 08:48 AM - edited 03-03-2019 09:32 AM
I have two sites with a layer 3 switch for routing vlans and a a router to connect each site. The router for connecting the sites is managed by an outside vendor. I'm want to pass ospf between each sites layer 3 switches without having to configure the vendors routers between the wan for ospf. How can I accomplish this. Thanks
05-12-2005 08:52 AM
One possibility might be to configure a GRE tunnel between the sites and run OSPF through the tunnel. That way the vendor would need to transport the GRE packets and would not see any difference whether a packet was a data packet or a routing update packet.
HTH
Rick
05-12-2005 12:18 PM
You will need to bould some type of tunnel between the sites (accross the routers). IPSec, GRE, IP-IP, etc. Keep in mind that this will lower the effective MTU.
I have no cisco's handy so you will have to check spelling, etc, but this sould work:
int t0
tunn source
tunn dest
ip addr
end
router ospf 1
network
end
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