OSPF Area 0 and Virtual Links Authentication in a transit area.

From: antonygrooves (antonygrooves@gmail.com)
Date: Fri Dec 12 2008 - 16:59:50 ARST

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 Hi Guys.
I would like to know which is the best way to configure authentication
in OSPF if i have to configure it on area 0 and for virtual links in a
transit area.

R1 in area 0 and area 1
R2 in area 1 and area 2

Is this correct.
R1
Under Ospf
Area 0 authentication message-digest.

Interface
ip ospf message-digest 1 md5 cisco

area 1 virtual link 1.1.1.1 authentication message-digest
area 1 virtual link 1.1.1.1 message-digest 1 md5 cisco

R2
Area 1 virtual-link 1.1.2.2 authentication message-digest
area 1 virtual-link 1.1.2.2 message-digest 1 md5 cisco

I'm not sure if its correct to repeat in R1 for the virtual link
authentication message-digest again or just by doing it for the backbone
area its enough.

I appreciate any help on this.

Tony.

Blogs and organic groups at http://www.ccie.net

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