Hello! James Carlson schrieb am Tue, 13 Jan 2015 16:31:29 -0500:
Not so much "wrong" as "pointless." Why bother to ask for less? You don't have to pad the packets out to the full MRU, so why do you care what the peer has advertised as a maximum? All that matters is that (by acking the value) you've promised not to send anything bigger. By adhering to a smaller limit, you're certainly in compliance with the peer's limitations.
Yes. However, the problem lies in the mechanism the Linux kernel determines the MTU of a link in a multilink bundle: It simply takes the peer's MRU we ACKed. Obviously this is not correct if we are bound to use a smaller (channel) MTU due to other constraints (tunnel overhead). But there is currently no possibility to tell the Linux kernel what channel MTU to use.
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