Simple MPLS question:

What is the quickest/simplest way to determine the exact number of Prefixes 
received by a PE Router from another PE Router over an MP-BGP session?

Thank you in advance for your answer!


--- On Wed, 3/3/10, Joe Astorino <[email protected]> wrote:

From: Joe Astorino <[email protected]>
Subject: Re: [OSL | CCIE_RS] Want to know how to calculate the EIGRP metric?
To: "Dale Shaw" <[email protected]>
Cc: "ccie_rs" <[email protected]>
Date: Wednesday, March 3, 2010, 7:13 PM

Yeah...I probably should not have included that check since it does not play 
into the calculation. <shrug>

On Wed, Mar 3, 2010 at 5:46 PM, Dale Shaw <[email protected]> wrote:


Hi Joe,



On Thu, Mar 4, 2010 at 9:29 AM, Joe Astorino <[email protected]> wrote:

> Hi Dale,

>

> The bandwidth that is set on R7 s0/0/0 is completely irrelevant to the

> calculation.



Yes, this is the point I've been trying to make, subtly, but failing :-)



In the second terminal output box in your article, you are checking

R7's s0/0/0 interface, but the bandwidth and delay values specified

there are irrelevant.



Nice article, but if I could give one piece of feedback it would be to

make it painfully clear that the composite metric is calculated

"uni-directionally" -- from the device performing the calculation, to

the ultimate destination -- using the egress interfaces *only*,

including the ultimate directly connected interface, in each hop along

the path.  (in this case, R8's s0/0/0 and R7's lo0.)



I've found this fact to result in a 'light bulb moment' for lots of

people struggling with EIGRP metric calculation.



Cheers,

Dale




-- 
Regards,

Joe Astorino CCIE #24347 (R&S)
Sr. Technical Instructor - IPexpert
Mailto: [email protected]


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