From: Greg Wendel (gwendel@gmail.com)
Date: Tue Feb 12 2008 - 12:18:05 ARST
You will need to understand this completely before you should take the exam.
On Feb 11, 2008 9:23 PM, Jersey Guy <guy.jersey@gmail.com> wrote:
> From Halabi's book, Internet Routing Architectures, 2nd edition, page 167:
>
> *MEDs are somewhat handicapped by aggregation scenarios in which providers
> announce a given CIDR block from multiple locations in their network and
> suppress the smaller routes from the block. Utilizing MEDs in this
> scenario
> could potentially result in suboptimal routing because the more-specific
> routes of the CIDR block could be scattered throughout the AS and MEDs
> associated with more-granular routes are no longer available.
>
> When using MEDs to perform what's commonly referred to as best-exit
> routing,
> some providers leak the more-specifics of their CIDR blocks to select
> peers
> to remove the offshoots introduced by aggregation. The problem with this
> is
> that controlling the more-specific announcements is sometimes complex, and
> failure to do so can result in some very suboptimal routing situations.
> *
> I read the above two paragraphs five times but didn't understand it. Which
> of the following is true:
>
> a) I have no choice but to understand this stuff, to pass the lab. I need
> to
> understand *everything* in Halabi's book, period.
> b) The lab is tough but not THAT tough. I can skip certain convoluted
> sections of every topic and still manage to get by.
> c) Forget it. I am not going to make it. MED is a piece of cake; what's so
> hard to understand??
> d) I need to read "How to grow gray matter and raise IQ" book before
> Halabi's.
>
> Thing is....how thoroughly do I need to pound away at theory/reading
> before
> hitting the equipment, lab scenarios and excercises?
>
>
> thanks, JG
>
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-- Gregory Wendel Springfield VA, 22153
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