Pete Heist wrote:
Date: Thu, 6 Apr 2017 13:48:00 +0100 From: Andy Furniss
<[email protected]> To: [email protected] Subject: Re:
[Cake] flow isolation for ISPs
Pete Heist wrote:
Cake is not a requirement yet. I like it for several of its
attributes (good performance with high numbers of flows, and also
when “over-limiting”, which I’ll explain more in my next round of
point-to-point WiFi results).
Would be nicer for your users though?
I mean in the sense that if the "outer" hash could be done on some
mark then the inner hash on connection as normal then they would
get more than a fifo, which seems to be how current solutions are
heading.
TBH, though I don't even get your set up - I mean is WISP like some
giant lan, or does anyone that asks get a real IP, do subscribers
normally have more than one access point? Just curious.
Cake has some nice qualities, yes, so we’ll see.
The network has been assembled over a number of years, by a number
of people (not by me personally), so it has a life of its own, but
works quite well, from a member’s perspective. :) I’m still figuring
out more about it myself, but it consists of a series of nodes, each
of which has at least a router, a WiFi AP for clients and an uplink
to the Internet connection either with point-to-point WiFi or some
other means (fiber, licensed radios, etc). If you want an idea:
http://mapa.czfree.net/#lat=50.76816800116274&lng=15.066890716552734&zoom=13&autofilter=1&type=satellite&geolocate=98%7C114%7C111%7C117%7C109%7C111%7C118%7C115%7C107%7C97&node=6101&aponly=1&bbonly=1&actlink=1&actnode=1&tilt=0&heading=0&;
<http://mapa.czfree.net/#lat=50.76816800116274&lng=15.066890716552734&zoom=13&autofilter=1&type=satellite&geolocate=98|114|111|117|109|111|118|115|107|97&node=6101&aponly=1&bbonly=1&actlink=1&actnode=1&tilt=0&heading=0&>
In some cases, like mine, my CPE has a single IP address from the
node’s router. In others, where there are nodes on top of apartment
buildings for example, members connect with Ethernet straight to the
router on the roof of the building, and IP addresses come from the
DHCP server on that router, and they get multiple IPs.
So it’s a mixture in this case, and that’s what makes hashing only
by IP address, or by IP address and flow, not ideal.
Ahh, OK, complicated then.
FWIW you may already know, but as I haven't read u32 docs for years I
don't know if it says but -
To match macs you use (IIRC from a decade ago) negative offsets, so -2
will get ethertype, -8 for 6 bytes is src -14 for dst.
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