From: Harish DV/peakxv (harish.dv@xxxxxxxxxx)
Date: Tue Jul 09 2002 - 06:08:59 GMT-3
Howard,
I ran into this scenario while testing virtual links.
|
|area 3
|
R1----area2------R2
| |
| |
| area 1 |
---------------------------
|
|
|
R3
|
| area 0
|
R4
R1,R2 and R3's area 1 is a frame cloud with R3's serial int as point to
multipoint
R1 and R2 are also connected via area 2 on ethernet
R2 also has another interface in area 3
R3 has another interface in area 0 connecting to R4
I know that we need virtual links between R1 -R3 and R2 - R3
My question is don't we need another virtual link from R2 ro R1 ?. If not,
what will happen if the R2's serial link connecting to frame cloud fails
and area 3 gets isolated?. or are there any other methods to achieve the
same connectivity?.
Thanks,
Harish
"Howard C.
Berkowitz" To: Sam.MicroGate@usa.tele
kom.de, hcb@gettcomm.com, ccielab@groupstudy.com
<hcb@gettcomm.com cc:
> Subject: RE: OSPF Virtual Link
across Non-OSPF area?
Sent by:
nobody@groupstudy
.com
05/10/2002 01:14
PM
Please respond to
"Howard C.
Berkowitz"
At 4:02 PM -0400 5/10/02, Sam.MicroGate@usa.telekom.de wrote:
>Howard,
>
>If the solution require a Virtual link, can I add both ends of the tunnel
to
>a new area 2.2.2.2, then create a virtual link across this area?
>
>Sam
>
One end of a virtual link, by definition, MUST be in area 0.0.0.0;
both ends MAY be.
If R1 and R3 were both in area 0.0.0.0, you could reconstitute it
with a virtual link through R2 in a nonzero area. It just doesn't
seem to be a virtual link application.
You might want to try Scenarios S0001-S0004, which are intended to be
run in sequence (building on one another), in the Gettlabs FTP server
at 12.107.238.3 (login anonymous, password your email address). Look
in the beta scenario directory. I'm still writing parts 5 and 6, but
they have a disgusting number of interacting virtual links, tunnels,
etc.
-- "What Problem are you trying to solve?" ***send Cisco questions to the list, so all can benefit -- not directly to me*** ******************************************************************************* *Howard C. Berkowitz hcb@gettcomm.com Chief Technology Officer, GettLab/Gett Communications http://www.gettlabs.com Technical Director, CertificationZone.com http://www.certificationzone.com "retired" Certified Cisco Systems Instructor (CID) #93005
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