[LARTC] Wrapping prio in tbf

[Stef Coene]

On Tuesday 04 May 2004 15:05, John Meeks wrote:
> The manual says (about prio):
> > Because it doesn't actually shape, the same warning as for SFQ holds:
> > either use it only if your physical link is really full or wrap it
> > inside a classful qdisc that does shape. The latter holds for almost all
> > cable modems and DSL devices.
>
> I want to wrap prio inside of tbf.  Here's why:  I have a server on a DSL
> line, which has both hobby and business websites.  I want to make it so
> that, if the bandwidth starts to get saturated, the hobby sites will slow
> down, while the business sites will not be affected.  In other words, I
> want to limit the total bandwidth to 700kbit (the max upload is 768kbit on
> the modem) with tbf, but have a priority queue so that the business site
> can take all available bandwidth if it's being used.  The two sets of
> sites are on different IP's, so I can either filter by IP or set the TOS
> flags with iptables.
>
> I'm using kernel 2.4.18, so htb doesn't work (although it looks like it
> might be good) and I also can't seem to get cbq to work (it accepts the
> commands, but nothing changes, the bandwidth isn't being limited).  I'm
> running tests on a spare server so I can try things without messing up the
> production server.
Htb should work.

> Here's what I was trying with cbq:
>
> tc qdisc add dev eth0 root handle 1:0 cbq bandwidth 100Mbit avpkt 64 cell
> 8
>
> tc class add dev eth0 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate
> 5kbit weight .5kbit prio 8 allot 1514 cell 8 maxburst 20 avpkt 1000
> bounded
Euh, 5kbit ???
See http://docum.org, you can find cbq scripts on the test pages.

> Any suggestions would be appreciated.  Keep in mind I'm new at this (never
> heard of tc before yesterday).
No problem.

Stef

=2D-=20
stef.coene@docum.org
=A0"Using Linux as bandwidth manager"
=A0 =A0 =A0http://www.docum.org/