I was looking at this situation as a special case of placing different flows on
different component links. So, you are correct in saying that flows may be
re-ordered which is business as usual, but within the flows the packets are not
I.e., packets within a given flow would be placed on either the new component
link or the old component link. After some period of time, packets of all
flows would be placed on the new component link and the one hop LSP on the old
component link would be torn.
> -----Original Message-----
> From: Tony Li [mailto:[email protected]]
> Sent: Monday, March 29, 2010 1:37 PM
> To: John E Drake; Mcdysan, David E
> Cc: [email protected]
> Subject: Re: composite link - candidate for respin, maybe
> Hi John,
> > The e-mail to which I was replying stated that there might be packet
> > re-ordering, and I was just pointing out that a reasonable
> > implementation can avoid either packet re-ordering or loss.
> I have to respectfully disagree.
> The case that Dave points out is exactly right: if a router is
> to a link of lower delay, then has no choice but to risk mis-ordering
> packets. The only other implementation alternative is to actually buffer
> them, which has some horrible side-effects for congestion control.
> Alternatively, if you have some magic that you're willing to share with us
> wherein you can get some packets to move faster than others, we'd love to
> know about it. ;-)
rtgwg mailing list