Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!rutgers!att!cbnewsh!tds
From: tds@cbnewsh.ATT.COM (antonio.desimone)
Newsgroups: comp.protocols.tcp-ip
Subject: routing protocols
Keywords: IGP, cisco, datagram routing
Message-ID: <5764@cbnewsh.ATT.COM>
Date: 14 Nov 89 21:11:34 GMT
Organization: AT&T Bell Laboratories
Lines: 23

Can someone point me to a source of information on cisco's
Interior Gateway Routing Protocol?  I've come across some of their
glossies that make mention of flow optimization, delay and traffic
measurements, etc.  I wonder if they do something much more
sophisticated than, for example, Open SPF as far as load balancing
(if I understand Open SPF, the protocol allows round-robin routing
over equal shortest paths).

Beyond cisco in particular, are there any IP router vendors who
attempt to make routing decisions based on real-time traffic
measurements?  I'm not talking about neat experimental algorithms,
or unused options in some protocol, but commercial (or at least
widely used) implementations.  My impression, based on an
admittedly cursory scan of the literature, is that a lot of
interesting work has been done but nobody has solved the stability
and measurement/timescale problems to the extent that someone
would risk such an algorithm in an operational network or a
commercial product. 
-- 
Tony DeSimone
AT&T Bell Laboratories
Holmdel, NJ 07733
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