Initial Route Server Stats for MAE-East
mnasto at franklin.nysernet.ORG
Sun Oct 22 21:30:41 UTC 1995
On Sun, 22 Oct 1995, Tim Bass wrote:
> > On Sat, 21 Oct 1995, Mike O'Dell wrote:
> > > remember that using pings to sample connectivity to a very busy
> > > cisco router is not a very reliable probe for several reasons.
> > > Returning pings is a low-priority task in the first place, and
> > > they are rate-limited, so if the processor is busy processing
> > > lots of BGP updates and several folks are fribbling with it
> > > using ping or SNMP, it is less than clear what they will see.
> > >
> > > -mo
> Michael A. Nasto quips:
> > OK! Agreed. So then, what would you use?
> Have you ever been in a classroom and had a student raise his hand,
> answer every question, ask intelligent questions, etc. just to prove
> to the class how smart he or she is. This is the premise of
> the 'Two Mike's Interchange' above. One says, HEY! I know ping packets
> are a lower priority than everything else in a *CISCO* router
> LOOK AT ME (wave wave). Then another kid in the class quips...
> if PING is not what you would use, give us a better utility.
> In fact... EVERYONE ( okay 99.73 percent :-) uses PING. After all
> router LOAD is router LOAD.... and if a few ICMP packets can't get
> back in a subjectly reasonable time.. then DUH.... "da network
> is busy......" BGP updates take bandwidth just like any other packet.
> Of course the 0.27 percent, zen routing gods of the universe just
> feel the load and the harmonic BGP update patterns and PING between
> the BGP updates.... for a better answer.
> Sorry, I could not resist.... and apologize for the satire. PING!!
> PING!! PING!!
Yes, Tim. I always hated the "geeky" kid who always raised his hand or
had an answer for everything, too. But, I was serious with this
question. I thought it was rather obvious, too, that the router may be
busy so, what is the point? If you don't use 'ping' or 'traceroute',
what else do you use? I thought he had an answer. Obviously not.
Michael A. Nasto Customer Support Manager
NYSERNet, Inc. Phone: 315-453-2912 x 256
200 Elwood Davis Road Fax: 315-453-3052
Suite 103 Email: mnasto at franklin.nysernet.org
Liverpool, NY 13088-6147 mnasto at transit.nyser.net
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