Why Are Routes Received From One Neighbor On A Point-to-multipoint In

1.	Why Are Routes Received From One Neighbor On A Point-to-multipoint Interface That Runs Eigrp Not Propagated To Another Neighbor On The Same Point-to-multipoint Interface?
Answer» The split horizon rule prohibits a router from advertising a route through an INTERFACE that the router itself uses to reach the destination. In order to disable the split horizon behavior, USE the no ip split-horizon eigrp as-number interface command. Some important points to remember about EIGRP split horizon are: Split horizon behavior is turned on by default. When you change the EIGRP split horizon setting on an interface, it resets all adjacencies with EIGRP neighbors reachable over that interface. Split horizon should only be DISABLED on a hub SITE in a hub-and-spoke network. Disabling split horizon on the spokes radically increases EIGRP memory consumption on the hub router, as well as the amount of traffic generated on the spoke routers. The EIGRP split horizon behavior is not CONTROLLED or influenced by the ip split-horizon command. The split horizon rule prohibits a router from advertising a route through an interface that the router itself uses to reach the destination. In order to disable the split horizon behavior, use the no ip split-horizon eigrp as-number interface command. Some important points to remember about EIGRP split horizon are:

Why Are Routes Received From One Neighbor On A Point-to-multipoint Interface That Runs Eigrp Not Propagated To Another Neighbor On The Same Point-to-multipoint Interface?

Answer»

The split horizon rule prohibits a router from advertising a route through an INTERFACE that the router itself uses to reach the destination. In order to disable the split horizon behavior, USE the no ip split-horizon eigrp as-number interface command. Some important points to remember about EIGRP split horizon are:

Split horizon behavior is turned on by default.
When you change the EIGRP split horizon setting on an interface, it resets all adjacencies with EIGRP neighbors reachable over that interface.
Split horizon should only be DISABLED on a hub SITE in a hub-and-spoke network.
Disabling split horizon on the spokes radically increases EIGRP memory consumption on the hub router, as well as the amount of traffic generated on the spoke routers.
The EIGRP split horizon behavior is not CONTROLLED or influenced by the ip split-horizon command.

The split horizon rule prohibits a router from advertising a route through an interface that the router itself uses to reach the destination. In order to disable the split horizon behavior, use the no ip split-horizon eigrp as-number interface command. Some important points to remember about EIGRP split horizon are:

Why Are Routes Received From One Neighbor On A Point-to-multipoint Interface That Runs Eigrp Not Propagated To Another Neighbor On The Same Point-to-multipoint Interface?

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