OSPF virtual link should be used as temporary solution and should not be
part of any internetwork design. The reason for that is complexity of
troubleshooting virtual links. A permanent virtual link is a sign of poorly
designed internetwork.
No real impact in the router performance.
-Origina
What attached figure? Forget something??
Mark Zabludovsky ~ CCNA, CCDA, 1/2-NP
[EMAIL PROTECTED]
"Even if I knew I had only 1 more week to live, I would still schedule
my CCIE lab. I would just have to work a little harder I guess. After all,
without any goals in life, I'm dead alread
You will take the actual router ID which the OSPF process has taken up on
that router. If you have a loopback address defined on the remote router i
can bet that loopback address is taken up as the router ID by the ospf
process.
Regards
Atif
-Original Message-
From: Thomas Peroutka <[EM
Thomas Peroutka wrote:
>
> when configuring a virtual link in OSPF, should I take the physical
> interface or the loopback interface as the remote router-id?
> router(config-router)# area {area-id} virtual-link {remote-router-id}
Hi Thomas,
If you have configured loopback interface, than you sh
Ditto. No piccy.
""Manish Patel"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
>
>
> Consider the above OSPF network. You have configured a virtual path to
> connect Area 3 with Area 0. What is your assessment of this network?
>
> 1. The network will
Well, it would help immensely if there were a diagram involved. :->
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Manish Patel
Sent: Tuesday, December 26, 2000 2:58 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject:OSPF vir
ummm i think something is missing ? Which above OSP network ?
-Original Message-
From: Manish Patel [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 27, 2000 9:58 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: OSPF virtual link question
Consider the above OSPF network.
The network diagram isn't attached, but... It's 4, in my opinion... (from
brainbench, right? :)
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Manish Patel
Sent: Tuesday, December 26, 2000 5:58 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject:
WHERE IS THE DIAGRAM
-Original Message-
From: Manish Patel [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 26, 2000 5:58 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: OSPF virtual link question
Consider the above OSPF network. You have configured
Configuration topology is okay. In this case you have area 1 as a transit
area.
It should work fine without any authentication.
The thing to know, however, is that the configuration command is a bit
misleading:
(config-router)#area n virtual-link partner-router-id
Where n is, in this case 1.
The r
Hi;
Due to the mail system incompatiable, the message was truncated,
I will provide more information to let you guys have more information.
Area 0 is formed by Router A and Router B
Area 1 is formed by Router B and Router C
Area 4 is formed by Router C only.
Router C set up a virtual link wi
I don't know what you mean by OSPF area rule, nor by the virtual link rule,
but:
In order to route from one of "not-backbone OSPF area" to another
"not-backbone OSPF area", you need to cross the backbone area (area 0). For
this reason, if one has two chained areas that do not "share" the backbone
Vincent- this is a textbook scenario for virtual links to Area 0. You must
realize that you will be building a 1 way LSA tunnel (configured on both
sides). How you look @ this, is that Router C is broke. It can't inform
Area 4 because it's not an ABR. You need to make the connection "from &
thr
Hi;
Thank you.
Vincent Chong
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A virtual link allows an ABR to Hop accross a transit area to reach area 0.
Generally speaking, they are to be avoided. Virtual links are more
acceptable in a migration situation, or if Area 0 has been segmented (I.e.
as a temp fix).
The little book of common sense says if it isn't broke then th
Not sure if you received any possible issues other than the whitespace. But
another common error...there are NO interface commands required for the
interfaces into the transit area. The authentication commands are placed at
the end of the area x virtual-link command under the ospf process. For
Thanks. I was configuring it as you suggest. I played around with this
more last night and I never got it to work. It's frustrating because it
seems so simple, yet I must be missing something that's right under my
nose.
I had some problems with lab equipment last night that I finally
resolve
PM
To: [EMAIL PROTECTED]
Subject: RE: OSPF Virtual Link Authentication [7:23867]
Thanks. I was configuring it as you suggest. I played around with this
more last night and I never got it to work. It's frustrating because it
seems so simple, yet I must be missing something that's righ
Remember that the virtual link is part of area 0, so did you do area 0
authentication message-digest?
Also how did you specify the key..
Router ospf 100
Area 0 authentication message-digest
Area X virtual-link a.b.c.d message-digest-key 1 md5 password
This must be on both routers.
I am workin
Darn, left off the area 0 thing. Knew it was something simple. Thank you.
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A0---purpose of virtual link is to enable access to Area 0, for more on this
check.
http://www.cisco.com/warp/public/104/27.html
James
-Original Message-
From: IT Guy [mailto:[EMAIL PROTECTED]]
Sent: Friday, February 22, 2002 5:03 AM
To: [EMAIL PROTECTED]
Subject: OSPF Virtual Link Auth
which area is a virtual link in?
""IT Guy"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi Guys,
>
> Please help me to solve the issues.
> DO we must have to configure virtual link for authentication aswell if our
> Area0 is configured for authentication also??
>
> 2nd. we h
Follow the same authentication procedures as Area 0. Try it out, prove me
wrong..
""IT Guy"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi Guys,
>
> Please help me to solve the issues.
> DO we must have to configure virtual link for authentication aswell if our
> Area0 is
Chuck,
Let's see if I can make any sense in my reply to your comments.
When I think of a "virtual-link" as it relates to opsf, I think of it in
terms of being a tunnel. Also, short of being able to use a virtual-link, a
tunnel is what's recommended to maintain connectivity for any non-
a comment or to in line ( like the states )
""Nigel Taylor"" wrote in message
news:[EMAIL PROTECTED]
> Chuck,
> Let's see if I can make any sense in my reply to your
comments.
> When I think of a "virtual-link" as it relates to opsf, I think of it in
> terms of being a tunnel. Also,
To add to this:
Here is another one that made me pull my hair out:
Maybe you can help shed some light on this one for me:
MD5 auth. in area 0
Specified #area 0 auth message-digest in the transit area (area 1)
Only specified#area 1 virtual-link x.x.x.x
Ditto config. on the other area 1 router:
Th
a comment or to in line ( like the states )
""Nigel Taylor"" wrote in message
news:[EMAIL PROTECTED]
> Chuck,
> Let's see if I can make any sense in my reply to your
comments.
> When I think of a "virtual-link" as it relates to opsf, I think of it in
> terms of being a tunnel. Also,
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