Solved: What if I make OSPF and EIGRP the same AD? Which one preferred?

yuhuiyao · ‎03-26-2009

What if I make OSPF and EIGRP the same AD? Which one will be preferred? Will OSPF and EIGRP then compare metric?

Thanks,

Edison Ortiz · ‎03-26-2009

The native AD will be chosen.

For instance, if you have an internal EIGRP route (AD 90) vs an AD modified OSPF route (AD 90), the EIGRP route will be chosen.

While if you had an AD modified internal EIGRP route (AD 110) vs an OSPF route (AD 110) the OSPF route will be chosen.

HTH,

__

Edison.

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Harold Ritter · ‎03-26-2009

Edison,

Just one correction. In the second instance, eigrp will chosen too because its native distance is 90 vs 110 for ospf. The only way to get ospf to win is to change its AD to be lower than the one assigned to eigrp.

Regards

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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