[c-nsp] Packet order and MP

[Oliver Boehmer (oboehmer)]

Jessup, Toby <> wrote on Thursday, January 19, 2006 9:57 PM:

> Does MP (MLPPP) protect packet order?

Yes.

> I just read RFC 1990 (again) and it seems to indicate that the
> sequence numbers in a MP packet header are only used to reassemble
> fragments in the receiver. 

No. Every datagram sent over an MLP connection has a sequence number, so
the receiver can put the datagrams in order.
Fragmentation is an add-on to this, MLP does not require that all
datagrams are fragmented.

> It appears it would be possible for OOO packets to occur in a case
> where MP uses a fragment length of one MP frame (a fragment has both
> the beginning and ending fragment bits set to 1 in the frame) and the
> differential delay between fast MP bundle elements is high (such as
> for a bundle of T1/E1 spans).

So? The sequence number will still be set in both MLP packets..

	oli