RE: BGP sync - Why? Why not?

Absolutely. For real world (Internet, big WAN, etc.) I can see it as
suboptimal. I'm just struggling with it in the context of practice labs and
the impending real lab.

--Hammer

"I was a normal American nerd."
-Jack Herer

From: miken miken [mailto:miken_at_sisna.com]
Sent: Friday, November 19, 2010 10:13 AM
To: --Hammer--
Cc: Cisco certification
Subject: Re: BGP sync - Why? Why not?

The simplest explanation I have found for real world scenarios is given by
Philip Smith from Cisco in his presentation that can be found on the NANOG
website. He states that it is not feasible to wait for the ~222,000 prefixes
to synchronize in IGP (OSPF/ISIS) before BGP will select the path. You can
hear this explanation about 1:11 into the presentation. However, I do not
know how to apply this to the lab, other than best practice??

Thank you
MikeN

On Fri, Nov 19, 2010 at 8:39 AM, --Hammer-- <bhmccie_at_gmail.com> wrote:

OK, I understand what synchronization is and how it works. So, all the
videos/audios/labs/etc. always say to explicitly disable it (I know it's
disabled by default). What I'm struggling with is why? If the end all result
of a lab is "full" reachibility and the lab doesn't disallow
synchronization, then isn't it helping us? I know I'm missing the big point
here but I don't see why it's a bad thing. Can someone enlighten me? The
byproduct would be that your troubleshooting might be a little different..

--Hammer

"I was a normal American nerd."
-Jack Herer

Blogs and organic groups at http://www.ccie.net
Received on Fri Nov 19 2010 - 10:47:04 ART