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List:       lartc
Subject:    Re: SFQ + speed caps
From:       Andy Furniss <adf.lists () gmail ! com>
Date:       2014-08-07 22:14:38
Message-ID: 53E3FA4E.1080709 () gmail ! com
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Dimitris Kotsonis wrote:
>
>>
>> Using htb you could have each user hitting a separate class, each
>> with a RATE and a common CEIL so that they can all burst if the
>> line isnt contended...  Then feed each of those that info BFIFO
>> with limit set just over 2x MTU sized packets (if the connection is
>> relatively slow).  Alternatively if your O/S has it check out
>> fq_codel.
>>
> I could do that but for a class C lan I would have to create 256
> seperate classes and 256 separate filters. Each for every ip. Whereas
> in SFQ you only have to specify that the hashing algorithm should
> work on the dst field & 0xFF and everything works automatically. For
> more than 256 ips things will get really clattered. Also I wonder if
> speed is an issue here with so many rules.

I don't think 256 is that much depending on h/w of course, You can hash
filters and using htb would let you do more eg. give priority to small
packets per user.

If you really want sfq, then to limit one user and go onto one sfq I
think you would need to look into ifb so you could double process some
packets.
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