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The next feature we have is the
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routing protocol that is...
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not really used that
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but you could use it in
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where basically, dynamic routing information rides
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So, originally, this was designed for hub and
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where the spokes of the topology
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only have one physical link
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that goes up to the
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So, they essentially should not need anymore routing
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But the hub would then need
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that the spokes are
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The key with this is that
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you cannot have any
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If you configure RIB, or OSPF,
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the advertisement of your
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So, the IP routing process must be on,
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On the hub, there's only one command
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So, if we were to look
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on router 5 who is the hub
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we would say, Router ODR.
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Then, assuming that
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over the frame relay network,
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we should see that router 2
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So, where this segment here is 192.10.10.0/24.
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And router 3 would advertise its LAN
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But on router 2 and router 3, there's no configuration
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If we were to go to router 5,
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and simply say, Router ODR.
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Then, look at the
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As long as CDP is running over the
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If we look at the
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CDP is not enabled on
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so ODR is not gonna
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If we look at the Show
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for the main multipoint frame
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So, at the link level, we would
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If we were to look at
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and Show CDP Neighbors.
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We are learning information
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Because if we
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CDP will run on
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but it doesn't run
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So, it's kind of
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where CDP is enabled on frame relay sub-interfaces,
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So, on router 5, now,
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now we are learning about
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on the frame relay
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If we Show IP Route,
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we now see this
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These are the on-demand
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that have been learned
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So, it says, "To get to
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this is via router 2."
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Router 3 is then advertising
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If we look at the
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on router 2 or router 3,
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They don't learn about
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They only learn about
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So, assuming that all of the
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It implies that the spoke should
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Likewise, if we look on
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We have the default route
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On router 3, this means that then, we would be
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We would be able
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LAN interface that
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because we're using the
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all of these.
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We can also see that ODR has an
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Which means that it
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than any of the other
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with the exception of what?
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So, we know what's lower than 160,
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internal EIGRP, OSPF, RIP.
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But above 160
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would then be external EIGRP
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So, ODR is more preferred
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Or excuse me, than external
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but it is less preferred than
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So, documentation-wise, if we look
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there is a separate configuration
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But there's really not much that
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So, enabling ODR,
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Say Router ODR.
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To disable the propagation of
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it says, "Turn CDP off."
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If we said, No CDP Enable
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that would likewise disable
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No CDP Run, that's the global
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Then, for any convergence
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of ODR,
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since it is using CDP
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as the transport protocol,
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it would mean that
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So, if I say, "The CDP
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and the CDP hold
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This would essentially be the same as like
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where we're now sending our
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Then, if we are older than
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we would remove them.
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