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EH isn't a HBH option or extension.
Joe
On 2020-02-27 15:06, Fernando Gont wrote:
On 27/2/20 19:52, Joe Touch wrote:
FWIW - there are separable issues here:
- whether an IP header (or parts thereof) should be changed in transit
AFAICT, the answer has always been yes, but limited to the hopcount/ttl in the base header and hop-by-hop options in the options/extension headers.
- whether an IP header length can change in transit
I see no reason why it can't become smaller, but if it can become larger then PMTUD and PLPMTUD don't work.
Besides AH (which obviously breaks), hosts typically try to validate that the error messages they receive correspond to something they actually sent. EH removal breaks that.
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