From: Scott Morris (swm@emanon.com)
Date: Sun Feb 18 2007 - 23:35:15 ART
How many areas does R4 have? Area Border routers are ones that have virtual
links to go to them.
R4 is in a single area (R2 is the ABR). If we were to add an additional
area on R4 that was not "touching" area 0, THEN we would need to assign a
virtual link there.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
wilson@wilsonch.gotdns.com
Sent: Sunday, February 18, 2007 8:34 PM
To: ccielab@groupstudy.com
Subject: IPExpert R&S WB8.0 [OSPF Lab 5] - Virutal Links
Hi Group,
Just trying to understand when virtual links are needed.
In the IPEXPERT scenario lab #5 it looks like the diagram below:
Why is it that R4 doesn't need a virtual-link?
Where as R2-R5, R5-R7, R2-6 needs virtual links but not R4? Thanks!
R7
/
Area 57
/
R5
/
Area 25
/
Area 0 -R2 (Frame Hub) <------Area 246 (Frame spoke)---R4
\
Area 246 (Frame Spoke)
\
R6
\
Multilink Network
\
R9
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