Re: [lwip-users] Pbuf pool size and network interface

[Bill Auerbach]

>Is such a small MSS valid?  All IP networks are supposed to guarantee
>that they can receive a segment of 576 bytes without fragmenting, so
>assuming the default header sizes that would make a TCP segment of 536
>bytes.  While setting it smaller might be OK in most situations, you
>might find that this causes interoperability problems with other stacks,
>as they could ignore your MSS request and just use 536 instead.

As there is a minimum (i.e., if an RFC states that there is one) it would be
a good init.c compile-time check.

Bill