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From: alok (alok.dube_at_APARA.COM)
Date: Tue Feb 11 2003 - 02:33:06 CST
As far as I understand, the OSPF protocol always sends LSA on "the links
which it advertises and forms adjacencies"
there is something referred to as passive, but then one cant form
adjacencies over passive links..............
assuming there are 2 links between Node A and Node B one is 64kbps other is
i need to use the 64kbps link to establish OSPF adjacencies and pass the LSA
information etc over it.
however i want the traffic to use the 100Mbps link...
so essentially, i want ospf to do the following:
for this 2 node network OSPF should have something like
for destination on node B , next-hop is via 100Mbps between node A and B
but, the interfaces themseleves are "passive" interfaces....
is there anyway this can be done?
in BGP this would be "destn network x.y.z.w" next-hop interface ip of B
which is directly connected...
so one could run BGP out-of-band over the 64Kbps but still put a next hop to
the other interface.....
so BGP doesnt even run on the 100Mbps link, it runs on the 64Kbps
link.....(signalling is segregated) but the forwarding is still over
how does one do this in OSPF?
another this which is confusing is that if the interface doesnt have an
"IP"...(unnumbered P2P) the RFC 2328 says:
If the neighboring router is fully adjacent, add a
Type 1 link (point-to-point). The Link ID should be
set to the Router ID of the neighboring router. For
numbered point-to-point networks, the Link Data
should specify the IP interface address. For
unnumbered point-to-point networks, the Link Data
field should specify the interface's MIB-II [Ref8]
ifIndex value. The cost should be set to the output
cost of the point-to-point interface.
so essentially, all i know is that it will be router-id X is next hop over
so and so P2P link....or the 64k link??????
how does one segregate the link-ids? so that each link is uniquely
and even if there is a way to "segregate" it out, how does one put that
100Mbps in the forwarding table and not the 64kbps?
is there any draft/document i can refer to for the same?
-thanks and rgds