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Would you please be able to look at the
configuration and information furnished in the PG and explain that in some
detail. One of the issues with PG is that it does not provide any rationale
behind why some things were done. The config is not completed the way you
described below. Any help and detail is appreciated. But I
now understand the concept as outlined below. However, the device that was
touching Area 115 is NOT the ABR for Area 1 or Area 15. That presents a
problem. Cat1 has Area 115 on it (loopbacks) and is just a member of Area 15,
for which r2 is the ABR and creates the transit link.
From: Scott Morris
[mailto:[EMAIL PROTECTED] So you have: Area 0 -- Area 1 -- Area 15 -- Area 115 In order to bring Area 15 in, Area 1 is
the transit area. After that is complete, then the previous area 1/15 ABR
is now a 0/1/15 ABR. So for the next one, Area 15 is the transit
area in order to bring Area 115 in. Not sure on the default cost part, I
haven't looked at that in detail! 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 [EMAIL PROTECTED] http://www.ipexpert.com From: Michael
Senno [mailto: I was not sure how to do it. What would be
the transit area to Area 0 in this case. R4 is attached to Area 115 and Area
15. Area 15 uses Area 1 as a transit, so Area 115 is two areas away. How would
the v-link be created? You guys added the cat to another VLAN and
put it in another area. Is this allowed? If so, why not drop it directly into
Area 0? The PG specifically says not to, but not why. What about the default-cost begin 14
instead of 15?
From: Scott Morris
[mailto:[EMAIL PROTECTED] A virtual link does not make you a
stub. you can link them together just fine. A virtual link extends
area 0 out to the farther ABR. Was this something you tried on your
routers? A GRE is possible as long as the lab doesn't disallow it. 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 [EMAIL PROTECTED] http://www.ipexpert.com From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Michael Senno I had some problems with Area 115. I
believe that a virtual link can NOT use another virtually linked area as a
transit since the v-link makes it a stub. Therefore area 115 would not be able
to use Area 15 as a transit, since area 15 is already using a virtual link.
The lab gets around that by putting Cat 1 into Area 1 through VLAN 40,
however this is not specifically allowed in the lab. The PG does explicitly say
that you can't just add it to the IPExpert VLAN though (Area 0). Why can you do
one and not the other? I'm assuming this has something to
do with the fact Cat1 is injecting an default-cost of 14 instead of 15 (its a
hop further I guess). Please advise. This seems to be a
good learning opportunity.
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- [OSL | CCIE_RS] Lab 27 - OSPF for Area 115 Michael Senno
- Re: [OSL | CCIE_RS] Lab 27 - OSPF for Area 115 Scott Morris
- Re: [OSL | CCIE_RS] Lab 27 - OSPF for Area 115 Michael Senno
- Re: [OSL | CCIE_RS] Lab 27 - OSPF for Area 115 Scott Morris
- Re: [OSL | CCIE_RS] Lab 27 - OSPF for Area ... Michael Senno
- Re: [OSL | CCIE_RS] Lab 27 - OSPF for ... Scott Morris
- [OSL | CCIE_RS] Lab 35 - Mobility Configuration Michael Senno
- Re: [OSL | CCIE_RS] Lab 35 - Mobility Confi... Scott Morris
