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New Member

neighbor eigrp

In a lan with several routers with interfaces in the same networks, is it possible to make that only ones are neighbors an others not?

This is an example:

routerA

router eigrp 200

network 10.0.0.0

no auto-summary

Router B

router eigrp 200

network 10.0.0.0

no auto-summary

Router C

router eigrp 200

network 10.0.0.0

no auto-summary

I wanto to only RouterA and Router B are neighbors eigrp

Thanks

Marcelo

5 REPLIES

Re: neighbor eigrp

Neighbors or just route sharing? Passive Interface will prevent route sharing. You could also use route filters to restict routes but still maintain a neighbor realtionship.

http://www.cisco.com/en/US/partner/tech/tk365/technologies_tech_note09186a0080093f0a.shtml

An ACL would prevent establishing neighbor relationships.

New Member

Re: neighbor eigrp

passive- interface is no an option y my real situation. Filtering maybe a solution.

There is the option to convert the peering to unicast ( neighbor x.x.x.x interface x), but i don´t know that if this command stop all the multicast or only the network involved.

Marcelo

Cisco Employee

Re: neighbor eigrp

Hall of Fame Super Silver

Re: neighbor eigrp

Hello Marcelo,

in addition to using passive-interface, you could use EIGRP authentication with matching parameters only on devices that should be neighbors

see

http://www.cisco.com/en/US/docs/ios/iproute_eigrp/configuration/guide/ire_cfg_eigrp_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1062735

Hope to help

Giuseppe

Re: neighbor eigrp

Marcelo,

Eigrp message authentication might help ya !

(config)#key chain KEY
(config)#key 1
(config)#key-string crack

(config)#interface eth0
(config-subif)#ip authentication mode eigrp 10 md5
(config-subif)#ip authentication key-chain eigrp 10 KEY

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