North American Network Operators Group

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Re: RFC 1918

  • From: Bennett Todd
  • Date: Fri Jul 14 15:05:01 2000

If the only excuse for outlawing RFC 1918 router interface
addresses is breaking path MTU discovery, then it seems to me
that it should be perfectly legal to use RFC 1918 addresses for
most router point-to-points; the only place where the Path MTU
Discovery argument could possibly apply would be when a box routes
between different interfaces onto links with different link MTUs.
Considering how often Path MTU Discovery doesn't work, folks
normally try pretty hard to avoid that circumstance anyway, so I'd
expect a great many routers to be able to be assigned RFC 1918 addrs
on their point-to-points with no operational problems.


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