RE: EIGRP Site of Origin

Is this a lab?

I have never seen a real network designed/implemented this way.

Please advise

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Malik Nouman Ahmad
Sent: Tuesday, January 04, 2011 3:51 PM
To: Cisco certification
Subject: EIGRP Site of Origin

Hi,

Suppose the connectivity is CE1 <->PE1 <-> PE2 <->CE2 and that CE1 and CE2
have a backdoor link. The PE-CE routing protocol is EIGRP. Now if we
configure same SoO community on both CE2 and PE1 using "ip vrf sitemap
<name>", then PE1 should automatically reject the updates coming through the
backdoor link

My question is that what will happen if the main VPN link between PE1 and
PE2 goes down.

   - Will PE1 be still rejecting the updates from CE2? If so, then when will
   the backdoor link used as the updates always being denied?
   - Will the backdoor link be used only for communication between CE1 & CE2
   (in case of VPN failure) and the reason of SoO community is to block the
   traffic arriving from any other CE (say CE3) which is connected to PE1 and
   is trying to reach CE2?

Please clarify

Thanks,
Malik

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Received on Tue Jan 04 2011 - 17:15:52 ART