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ietf-wg-dnsop / draft-ietf-dnsop-avoid-fragmentation

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Robert Wilton DISCUSS (2) #6

Open vixie opened 10 months ago

vixie commented 10 months ago

(2) p 3, sec 3.2. Recommendations for UDP requestors

R6. UDP requestors SHOULD limit the requestor's maximum UDP payload size to the RECOMMENDED size of 1400 or a smaller size.

I find this recommendation to be unclear because it mixes both a "SHOULD" and "RECOMMENDED", i.e., I find it unclear as to what the "SHOULD" applies to. Is the recommendation (i) that UDP requestors should limit the maximum UDP payload. Or (ii) is the recommendation that a limit of 1400 be used, or (iii) perhaps both. Maybe rewording this to something like the following would help:

R6. UDP requestors SHOULD limit the requestor's maximum UDP payload size to 1400 bytes, but MAY limit the maximum UDP payload size to a smaller size on small MTU (less than 1500 bytes) networks.

or,

R6. UDP requestors SHOULD limit the requestor's maximum UDP payload size. It is RECOMMENDED to use a limit of 1400 bytes, but a smaller limit MAY be used.

paulwouters commented 9 months ago

I thought it was clear but can't see why not to use your second suggestion, so did that in my proposed PR to please everyone.