6.6 Configuring EIGRP
6.6.2 Configuring EIGRP support for IPX
To enable EIGRP for IPX, perform the following steps:
  1. Enable IPX routing.

    router(config)#ipx routing

  2. Define EIGRP as the IPX routing protocol.

    router(config-ipx-router)#ipx router {eigrp autonomous-system-number | rip}

    If IPX EIGRP is selected, an autonomous system number must be specified. This number must be the same for all IPX EIGRP routers in the network. -  

  1. Indicate which networks are part of the EIGRP autonomous system.

    router(config-router)#network network-number

  2. (Optional) If IPX RIP is also operating on the router, remove RIP from the networks using EIGRP by going to the router rip configuration entry and doing the following:

    router(config-router)#no network network-number

Redistribution of RIP information between the RIP and EIGRP networks follows several very specific guidelines:

  • When redistributing from RIP, the external hop count in the Enhanced IGRP update is the RIP hop count incremented by one. The external delay is the RIP delay.
  • When sending an Enhanced IGRP learned route out in a RIP update (redistributing Enhanced IGRP into RIP), the Enhanced IGRP external hop count is incremented by one and used as the RIP hop count.
  • The RIP delay is calculated by adding the Enhanced IGRP external delay, the delay of the outgoing interface, and the delay of the Enhanced IGRP cloud.
  • The Enhanced IGRP metric is calculated by converting the RIP delay into an Enhanced IGRP style delay, in this case (5500 ¥ delay), left-shifted 8 bits. This value is used with a static value of 9600-bps bandwidth in the Enhanced IGRP metric computation.