PHILLIPS Mark wrote:
Hi,
I'm posting for a thirdparty.
Does anybody have any experience with Border Gateway Protocols? I know
I don't, I had to Google it!
"I am trying to locate people who have had experience operating large
networks, in particular people who are familiar with the operation of
BGP within the networks. Specifically, what I am trying to locate is
some stories of what occurs within a network during periods of
instability.
So when routes flap, how long does the network take to converge again
and what are the factors that influence the network convergence."
So if you have any war stories please let me know.
I've hands-on real-life experience managing multi-homed Networks.
Specifically, I managed multi-homed
networks with three upload/download to/from external Networks; two of
these feeds are terrestrial and
one is satellite. I also maintained iBGP which is BGP in the intranet.
Convergence, depends on how big or small your routing table and whether
you are
converging from complete or partial disconnections.
In 2001, the last time I have direct knowledge about this aspect of
network management, when
the entire three networks are re-started, it takes about 5 minutes on
two Cisco4500 to converged
the entire Internet feed. When re-starting only one or two feeds, the
customers hardly notice the
flips-and-flops. This is on the condition that at least one-of the
landline is up.
With the size of the Internet growing bigger by the day, under the same
circumstances to the one
I had, it will take longer than 5 minutes, of course. As to exactly how
long, I do not know because I
don't manage the Networks anymore.
If you are after redundancy, there are more than one avenues for you.
But because decisions
regarding these things are expensive and takes time to build the
infrastructure, a careful
research or business plan had to be undertaken.
Hope this helps.
O Plameras
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