Re: Limited number of bands in PRIO qdisc

Linux Advanced Routing and Traffic Control

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Patrick Reinhardt wrote:
Hi!

Am Mittwoch, 22. August 2007 21:27:52 schrieb Andy Furniss:
Patrick Reinhardt wrote:
returns: 'RTNETLINK answers: Invalid argument'
I got a better error message than that -

"priomap" index > TC_PRIO_MAX=15

Greping for TC_PRIO_MAX shows it's in both kernel and iproute2's copy of
the headers - I don't know if you need to do both or not - but I would
and recompile kernel and tc
Thank you very much for this hint. Unfortunately my current idea would require about 1000 bands:

To emulate a wireless network I have to assign a packet loss depending on the target IP address. The idea was to use a PRIO qdisc with n bands for n nodes and use filters to assign packets to the appropriate band depending on the target address.

Since I am unsure about side-effects of an alteration of TC_PRIO_MAX to a signifficantly higher value, an alternative would be helpful.

I suppose you could try ifb - but there is probably a define somewhere needing to be changed if you want 1000, but then you could have 16 prio on each.

Andy.

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