OSPF vs RIP vs EIGRP

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Nov 7th, 2008
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Question, I have 2 1700 routers connected to 2 switches on each end and computers on each end. When I network OSPF, ping from one computer end to the other works fine, when I try EIGRP or RIP it's not becoming adjacent, all my masks are 255.255.255.0. Why is this happening ?

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Giuseppe Larosa Fri, 11/07/2008 - 09:07
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Hello Sergej,

you should provide more info to get better help.


I would suggest you to post a filtered version of the two routers configuration removing users and passwords and changing/masking the public ip addresses.


My guess is that RIP and EIGRP by default performs auto-summary at major network boundary for their distance vector nature while OSPF doesn't.

This can be a problem if you have two parts of the same major network divided by another one.

For example


10.10.10.0/24 -- R1 --- 192.168.1.0/24 --- R2 --- 10.10.20.0/24


try on rip / eigrp

router rip

version 2

no auto-summary


router eigrp xx

no auto-summary


Hope to help

Giuseppe



joshua.wilson Fri, 11/07/2008 - 15:27
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RIP and EIGRP by default auto summarizes...what network are you using?

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