Re: IE Workbook lab 3 Task 2.1 and 4.1

Ok, thank you very much, Anthony !!
----- Original Message -----
From: "Anthony Sequeira" <asequeira_at_ine.com>
To: "Julio Carrasco" <julio.carrasco_at_ya.com>
Cc: <ccielab_at_groupstudy.com>
Sent: Tuesday, June 15, 2010 6:07 AM
Subject: Re: IE Workbook lab 3 Task 2.1 and 4.1

> Hello Julio!
>
> Without the task in front of me, I am going to guess that R4 and R5 are PE
> routers in an MPLS L3 VPN scenario. To quote a "Deep Dive" from the very
> latest version of our WB II....
>
> "The use of a /32 prefix allows the local router to advertise a NULL label
> for the prefix. Any non-host route will generate a special label that the
> local router will use to perform an aggregate lookup based on the
> destination IP address in the packet. With the NULL label advertisement,
> the label lookup will be performed based on the VPNv4 label, in the case
> of an MPLS VPN scenario."
>
> Warmest Regards,
>
> Anthony J. Sequeira, CCIE #15626
> Senior CCIE Instructor
>
> Test your Tier 1 Knowledge
> Q: For RIPng, you can only disable split-horizon ...
> A: globally
> More Info: http://www.ietf.org/rfc/rfc2080.txt
>
> On Jun 14, 2010, at 10:19 AM, Julio Carrasco wrote:
>
>> Hello experts,
>> I am reviewing this lab, and I saw, that on Task 2.1 it says that is
>> necessay
>> for Lo0 on R4 and R5, to be announced with a mask of 32 bits, so the LDP
>> peering on task 4.1 needs both loopbacks to be a /32 mask.
>> I do not understand exactly why, so could anyone please help me with that
>> ?
>>
>> Thanks in advance and best regards !!!!
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue Jun 15 2010 - 10:28:07 ART