OK, here's a very simple (working!) example script which simply limits
upload to 15 Mbps.
htb.sh:
#!/bin/bash
#Some note from HTB documentation:
#Usage: ... qdisc add ... htb [default N] [r2q N]
# default minor id of class to which unclassified packets are sent {0}
# r2q DRR quantums are computed as rate in Bps/r2q {10}
# debug string of 16 numbers each 0-3 {0}
# ... class add ... htb rate R1 burst B1 [prio P] [slot S] [pslot PS]
# [ceil R2] [cburst B2] [mtu MTU] [quantum Q]
# rate rate allocated to this class (class can still borrow)
# burst max bytes burst which can be accumulated during idle period
{computed}
# ceil definite upper class rate (no borrows) {rate}
# cburst burst but for ceil {computed}
# mtu max packet size we create rate map for {1600}
# prio priority of leaf; lower are served first {0}
# quantum how much bytes to serve from leaf at once {use r2q}
set() {
for i in 0; do
# MAX=16000kbit
# MAX=$[15*1024]kbit == 15360kbit < 16000 kbit
MAX=15mbit
tc qdisc del dev eth$i root
tc qdisc add dev eth$i root handle 1:0 htb default 1 r2q 100
tc class add dev eth$i parent 1:0 classid 1:1 htb rate $MAX
# tc class add dev eth$i parent 1:0 classid 1:1 htb \
# rate 15mbit burst $[1514 mtu 1514 quantum 1514
done
}
show() {
for i in 0 1; do
tc -s qdisc list dev eth$i; tc -s class list dev eth$i
done
}
$1
Call as ./htb.sh set or ./htb.sh show
Limits output on eth0 to 15mbit on set and shows settings on eth0 and eth1
on show.
If you need a full fledged script (4*n+20 rules from a server doing HTB
per user in an apartment LAN) than mail me...
Cheers,
MaZe.
On Sat, 27 Aug 2005, Joe Klemmer wrote:
> Ok, this has been kicking my @$$ for weeks. I'm trying to get some
> kind of bandwidth shaping working on my server. I need to throttle ftp down
> so as not to suck up all the available bandwidth. I had cbq working on the
> old server (an ancient RH 6.2 box) so I figured I'd just move the config over
> and get cbq.init from sf.net and it should work. Unfortunately it doesn't.
> At least it doesn't work to the extent that no throttling of ftp is being
> done. So next I thought I'd try htb (as someone here mentioned it as an
> alternative). After printing out the entire section on bandwidth management
> from the lartc documentation I still can't seem to get anything working. I
> think I'm at the "forest/trees" point where I've been banging my head against
> this so much I'm missing something obvious.
>
> So, if anyone out there could lend a hand (or more precisely a pair
> of eyes) I would be greatly appreciative. To save list bandwidth, send
> replies to me and once I get things working I'll post a summery, with full
> credit attribution, to the list.
>
> Thanks in advance,
> Joe
>
>
