Network types

[jonk34567]

Ospf has network types .( frame relay, broadcast network ) does Rip and Eigrp also has network types ?

[Julio E. Moisa]

Hi

Good question, in OSPF you can configure the network type on the interfaces explicity, also depending of the network requirements.

http://packetlife.net/blog/2008/jun/19/ospf-network-types/

Now in RIP or EIGRP there is no way to configure the interfaces like OSPF but they can work over Broadcast, NBMA (Non Broadcast Multi Access) types and Point-to-Points for example using Serial interfaces. Now take in consideration the theory of Split Horizon when you are using EIGRP and RIP on NBMA networks. 

Split-Horizon is enabled by default, if a prefix or packet is known through a physical interface this physical interface cannot advertise the same prefix learned, in few words the packet will dropped. 

http://packetlife.net/blog/2008/nov/03/disabling-split-horizon/

Hope it is useful

:-)

[jonk34567]

so if i am working on frame relay network in  rip  i have to disable split-horizon or poison reverse.

[Julio E. Moisa]

Hi

If you have a NBMA network and you are using vector distance routing protocols like RIP or EIGRP you need to disable the split horizon in order to avoid drop packets.