Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ccci.UUCP!tcs
From: tcs@ccci.UUCP (Terry Slattery)
Newsgroups: comp.protocols.tcp-ip
Subject: Routing loop tools
Message-ID: <9101021609.AA04852@ccci>
Date: 2 Jan 91 16:09:06 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 15

Has anyone developed tools for diagnosing routing loops?  I'm thinking of
something that gets routing tables and configurations from multiple routers
in a 'snapshot' fashion while the routing loop exists.  Using SNMP would be
nice, but the MIB doesn't contain an entry identifying the source of the
routes (i.e. static, RIP derived, etc), making it more difficult to
determine the source of the problem.  [Should MIB-II incorporate such a
variable?]  I'm planning on building something to telnet to each router and
grab a copy of the routing table, perhaps using 'expect', but wanted to
check for existing tools first.  

Tools for analyzing the routing tables would be nice, but not critical.

Thanks,

	-tcs