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Re: [RRG] Ivip's fix for tunnel o-head, PMTUD & fragmentation problems
- To: Robin Whittle <rw@firstpr.com.au>
- Subject: Re: [RRG] Ivip's fix for tunnel o-head, PMTUD & fragmentation problems
- From: Brian E Carpenter <brian.e.carpenter@gmail.com>
- Date: Thu, 18 Oct 2007 13:34:48 +1300
- Cc: Routing Research Group list <rrg@psg.com>
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On 2007-10-17 06:55, Robin Whittle wrote:
...
... While it does this, it fragments longer
packets which it tunnels to the ETR, even if the sending host set
the DF bit.
As written, that seems to be a direct violation of RFC 791.
I doubt we can anticipate all the unintended consequences.
A tunnel, like a link layer, is fully entitled transparently
to fragment *and reassemble* the packets that it carries, but
that isn't what you propose.
Brian
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