IPv6: IS-IS or OSPFv3

Joe Malcolm jmalcolm at uraeus.com
Sat Dec 27 21:24:18 UTC 2008

Steven M. Bellovin writes:
>Unless, of course, someone one hop away -- a peer?  a customer?  an
>upstream or downstream? someone on the same LAN at certain exchange
>points? -- sends you a CLNP packet at link level...

True enough, and mistakenly enabling ISIS on external ports has been
known to happen though in the absence of malice it usually causes no
problems. If it does cause problems, generally the source can be more
easily localized given that it has to be L2-adjacent to one of your


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