RE: [LARTC] SFQ buckets/extensions

["Michael T. Babcock" <mbabcock@fibrespeed.net>]

For the sake of a play-by-play (and why it wouldn't quite work right
initially):

1) we need to dequeue a packet
2) we ask the 11 bit lower SFC for a packet.
3) it asks the upper SFC
4) the upper SFC takes the next bucket, based on IP, and gives us a
packet.
5) the lower SFC takes that packet and has nothing else to work with, so
it passes it on.

... So you're right :-)

The two have to intercommunicate more ... So they have to be one.

> Hmm I can't imagine that :) Probably it should be tested
> 
> On Fri, 7 Jun 2002, Michael T. Babcock wrote:
> 
> > > It can't be done. Outer SFC could do nothing with the packet.
> > > It could only give it to inner one....
> >
> > ... Ah, but it can choose which packet to give the inner 
> one.  It would
> > reorder the packets into a semi-fair order based on IP.
> >
> > > > ... SFC (8 bit hash against dest ip)
> > > >      |
> > > >      \-- SFC (11 bit hash against src ip, port, dest ip, port)
> > > >           |
> > > >           \-- dequeue ...

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