From: Vazquez, Jorge (Jorge.Vazquez@acs-inc.com)
Date: Wed Feb 27 2008 - 14:21:25 ARST
I think now I understand the solution provided by IE, they are using another
ospf process to communicate. The solutions use ospf process 2 for
communicate with BB2 and process 1 to communicate with the others ospf
routers. Ethernet addresses are 161.x.xx.0/24 and loopbacks are
150.x.x.x/24.
According to the solution there is a mutual redistribution between the
processes 1 and 2. Also for the summarization it uses:
Summary-address 150.1.0.0 255.255.0.0
And
Summary-address 161.1.0.0 255.255.0.0
My question is: why area 0 range 161.1.0.0 255.255.0.0 was not used, I think
is a simple answer due it avoids the additional process creation and the
redistribution.
BB2
|
|
R2 --- R3 ----- R4 ---- R5
Jorge Vazquez
Network Engineer
214-584-5614
_____
From: Todd, Douglas M. [mailto:DTODD@PARTNERS.ORG]
Sent: Wednesday, February 27, 2008 7:14 AM
To: Vazquez, Jorge; ccie forum
Subject: RE: IE Lab 2 Core
My 2c:
Not remembering this lab:
I would expect that the 161.1/16 network is a external route. I their
design, with a redistribute connected subnets route-map conn-ospf....
This is usually done when an interface is not directly required to have a rt
protocol assigned to it. Thus it comes in as an external vs an internal
route.
With regards to OSPF commands:
Summary address - E2/E1 Routes
Area Range - IA Routes
DMT
_____
From: nobody@groupstudy.com on behalf of Vazquez, Jorge
Sent: Tue 2/26/2008 2:58 PM
To: ccie forum
Subject: IE Lab 2 Core
I have some questions on this LAB, in the task 5.1 Loopback interfaces are
used for establishing IBGP sessions when is not required, it is only
required for R4 and R5.
In Task 4.6, R3 is summarizing the network 161.1.0.0 using the
summary-address command instead using area 0 range 161.1.0.0 255.255.0.0
command, does anyone know why summary-address is used?
Thank you,
Jorge
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