I have cisco 1841 router in the branch office and the 2811 in the main organization. I can config only my router.
In my network i have some subnetworks in different VLANs. The core of the network is 3 Com switch with layer 3 routing. every subnetwork has as default router sub-interfase in switch and switch has default router cisco. in cisco i have static routes for every subnetwork in lan.
And now question. Now i am installing ipsec gre tunnel with chief office and i need to anounce over ospf my routes, but as a i know ospf can work only with networks which have the same interfaces in router. it mean that i cannot anounce routes to my subnetworks because i have only static routes for them, not interfaces.
Can you say me how can i announce these routes to another point in gre-tunnel.
Ofcourse i can ask system administrator in main office to write special routes in static table and it will be fine but it is interesting for me to solve this problem.
Maybe i can use loopback interfaces? i can add loopback interfaces to every vlan that i want to transmit over ospf, bit now i cant check this idea.
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You might want to "tag" the injected statics so it's easy to recognize them.
If needed, you can also filter which statics are injected into the OSPF topology.
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