|
If the Cat is a member of area 15 and area 115, that makes
it an ABR. And SHOULD be where the VL terminates. I will look
at the config/PG.
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:[EMAIL PROTECTED] Sent: Wednesday, July 26, 2006 6:20 AM To: [EMAIL PROTECTED]; [email protected] Subject: RE: [OSL | CCIE_RS] Lab 27 - OSPF for Area 115 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.
|
- [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
