From: Vazquez, Jorge (Jorge.Vazquez@acs-inc.com)
Date: Wed Feb 27 2008 - 18:45:52 ARST
At the moment the task is required we don't have the External routes for the
161.1.XX.0/24, but finally we will have something like:
E2 150.1.4.0/24
E2 150.1.5.0/24
E2 150.1.8.0/24
O IA 161.1.45.0/24
E2 161.1.67.0/24 (redistributed from other protocol)
E2 161.1.23.0/24 (redistributed from other protocol)
Jorge Vazquez
Network Engineer
214-584-5614
-----Original Message-----
From: Douglas M Todd, Jr [mailto:dtodd@partners.org]
Sent: Wednesday, February 27, 2008 2:40 PM
To: Vazquez, Jorge
Cc: ccie forum
Subject: Re: IE Lab 2 Core
please dump a sh ip route
Let see what type of ospf route the 161.1/16 is in the FIB.
Douglas
Vazquez, Jorge wrote:
> 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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