Re: [Sip] Re: URI comparison rules

   From: Paul Kyzivat <pkyzivat@cisco.com>

   > (2) Since there are a limited number of
   > likely representations of any address, having different entities use
   > different representations will only delay loop detection, not prevent
   > it.  And loops will be detected even if address comparisons have
   > occasional false negatives.

   While the number is *limited*, the limit is pretty large.

True, but I expect in practice there will be no cases with more than 3
representations of the same address used by any one SIP agent unless
it's deliberately trying to defeat loop detection.  That case is
ameliorated by (1) a malicious agent would have to handle the message
"every time around the loop", which would place a high burden on it,
and (2) loops will eventually be detected by Max-Forwards in any case.

Dale

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Re: [Sip] Re: URI comparison rules - IPv6 addresses