RE: OSPF virtual link

Thanks

From: Bryan Bartik [mailto:bbartik_at_ipexpert.com]
Sent: Thursday, November 05, 2009 9:38 AM
To: Marcin Zgola
Cc: tharak.abraham_at_wipro.com; ccielab_at_groupstudy.com
Subject: Re: OSPF virtual link

Marcin,

You don't need a direct physical connection for two routers to form a
virtual-link. What happens if R1's interface to area 0 goes down or goes
away? You still have a partitioned area 0 if you don't have a VL between
R2 and R3.

On Thu, Nov 5, 2009 at 7:35 AM, Marcin Zgola <MZgola_at_netrixllc.com>
wrote:

area0
|
|
R3----------
               \
                \
Area 134 \R1---area0
Frame Relay /
                /
               /
R2----------
|
|
Area0

Ok, so my question is: do i need to have virtual links between r3-r1,
r1-r2, and r3-r2 or between r3-r1 and r1-r2 is good enough. Since r2 and
r3 do not have physical connection.

I hope this make sense guys
.

Marcin Zgola
Internetwork Lead
CCIE #18676
Netrix, LLC
http://www.netrixllc.com
Ph. 847-964-5300
Fax.: 847-964-5350

-----Original Message-----
From: tharak.abraham_at_wipro.com [mailto:tharak.abraham_at_wipro.com]
Sent: Wednesday, November 04, 2009 11:06 PM
To: Marcin Zgola; ccielab_at_groupstudy.com
Subject: RE: OSPF virtual link

Marcin,

If possible could you make your scenario a lil more clearer ?

If I got it right with the hub having an attached area 0, then the
topology looks fine without any VL's.

Please post your observation ..

BR,
Tharak.

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Marcin Zgola
Sent: Thursday, November 05, 2009 8:09 AM
To: ccielab_at_groupstudy.com
Subject: OSPF virtual link

Internetwork expert workbook 5 volume II Lab 11.

If I have a network diag 2 spokes connected to a hub using frame relay
(no pvc between spokes)

In this could I run OSPF Are 134, and each of my frame relay routers
also connects to Area 0 mean that I need virtual link to complete Area
0.

My question is should I have VL between spokes and hub? Or also between
spokes as well?

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Received on Thu Nov 05 2009 - 09:48:47 ART