North American Network Operators Group
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IS-IS protocol implementation problem
- From: Sean Donelan
- Date: Sun Oct 29 17:59:10 2000
Network operators using IS-IS on Cisco should be aware of a problem
which can result in their routers reloading unexpectedly when a corrupt
IS-IS packet is received. Cisco has fixed the problem in various 12.0
software trains. The problem can cascade through a single provider's
network. Because IS-IS is an IGP protocol, it does not propagate between
providers.
This has already affected a provider. I haven't found out what is
originating the bad IS-IS packet, i.e. is this an inter-vender operability
issue?
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