After another two days of trying to get this to work like I think it
should, I've still hit a brick wall.
As I am at a total loss as to what's going on, I am providing my shell
script that I use to setup my
tc rules.
You will notice a big section that is commented out. Those are rules I
have been using that (for
all intents and purposes) for like I expect.
I adapted my section based on the example I found at
http://lartc.org/howto/lartc.cookbook.ultimate-tc.html section 15.8.3
#!/bin/sh
IFext='eth0'
IFint='eth1'
rc_done=" done"
rc_failed=" failed"
MAX_RATE='360kbit'
MAX_RATEA='360'
INGRESS_RATE='1400kbit'
return=$rc_done
TC='/sbin/tc'
tc_reset ()
{
# Reset everything to a known state (cleared)
$TC qdisc del dev $IFext root 2> /dev/null > /dev/null
}
tc_status ()
{
echo "[qdisc - $IFext]"
$TC -s qdisc show dev $IFext
echo "------------------------"
echo
echo "[class - $IFext]"
$TC -s class show dev $IFext
}
tc_showfilter ()
{
echo "[filter - $IFext]"
$TC -s filter show dev $IFext
}
case "$1" in
start)
echo -n "Starting traffic shaping"
tc_reset
# U320="$TC filter add dev $IFext protocol ip parent 1:0 prio 0 u32"
$TC qdisc del dev eth0 root
$TC qdisc del dev eth0 ingress
# uplink
# dev eth0
$TC qdisc add dev $IFext root handle 1: htb default 20
$TC class add dev $IFext parent 1: classid 1:1 htb rate $MAX_RATE
burst 6k
$TC class add dev $IFext parent 1:1 classid 1:10 htb rate 240kbit
ceil $MAX_RATE burst 6k prio 1
$TC class add dev $IFext parent 1:1 classid 1:20 htb rate 200kbit
ceil $[9*$MAX_RATEA/10]kbit burst 6k prio 2
$TC qdisc add dev $IFext parent 1:10 handle 10: sfq perturb 5
$TC qdisc add dev $IFext parent 1:20 handle 20: sfq perturb 5
$TC filter add dev $IFext parent 1:0 protocol ip prio 10 u32 match
ip tos 0x10 0xff flowid 1:10
$TC filter add dev $IFext parent 1:0 protocol ip u32 match ip
protocol 1 0xff flowid 1:10
$TC filter add dev $IFext parent 1: protocol ip prio 10 u32 match ip
protocol 6 0xff match u8 0x05 0x0f at 0 match u16 0x0000 0xffc0 at 2
match u8 0x10 0xff at 3 flowid 1:10
# downlink
# dev eth0
tc qdisc add dev $IFext handle ffff: ingress
$TC filter add dev $IFext parent ffff: protocol ip prio 50 u32 match
ip src 0.0.0.0/0 police rate $INGRESS_RATE burst 10k drop flowid :1
#
# dev eth0 - creating qdiscs & classes
#
#$TC qdisc add dev $IFext root handle 1: htb default 90
#$TC class add dev $IFext parent 1: classid 1:1 htb rate $MAX_RATE
#$TC class add dev $IFext parent 1:1 classid 1:10 htb rate 240kbit
ceil $MAX_RATE prio 0
#$TC class add dev $IFext parent 1:1 classid 1:20 htb rate 192kbit
ceil $MAX_RATE prio 1
#$TC class add dev $IFext parent 1:1 classid 1:30 htb rate 80kbit
ceil $MAX_RATE prio 2
#$TC class add dev $IFext parent 1:1 classid 1:40 htb rate 64kbit
ceil $MAX_RATE prio 3
#$TC class add dev $IFext parent 1:1 classid 1:50 htb rate 32kbit
ceil $MAX_RATE prio 4
#$TC class add dev $IFext parent 1:1 classid 1:60 htb rate 20kbit
ceil $MAX_RATE prio 5
#$TC class add dev $IFext parent 1:1 classid 1:70 htb rate 16kbit
ceil $MAX_RATE prio 6
#$TC class add dev $IFext parent 1:1 classid 1:80 htb rate 8kbit
ceil $MAX_RATE prio 7
#$TC class add dev $IFext parent 1:1 classid 1:90 htb rate 2kbit
ceil $MAX_RATE prio 8
#$TC class add dev $IFext parent 1:1 classid 1:100 htb rate 2kbit
ceil 20kbit prio 9
#$TC qdisc add dev $IFext parent 1:10 handle 10: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:20 handle 20: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:30 handle 30: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:40 handle 40: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:50 handle 50: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:60 handle 60: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:70 handle 70: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:80 handle 80: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:90 handle 90: sfq perturb 10
#$TC qdisc add dev $IFext parent 1:100 handle 100: sfq perturb 10
tc_status
;;
stop)
echo -n "Stopping traffic shaper"
tc_reset || return=$rc_failed
echo -e "$return"
;;
restart|reload)
$0 stop
$0 start || return=$rc_failed
;;
stats|status)
tc_status
;;
filter)
tc_showfilter
;;
*)
echo "Usage: $0 {start|stop|restart|stats|filter}"
exit 1
esac
test "$return" = "$rc_done" || exit 1
Regardless of the values I use for any of the rates, I still have the
same problem. I do not classify ANY traffic with iptables for this set
of tc filters, so any traffic that is generated is solely shaped by tc
in this case.
The problem I have is this, whenever I allow any torrent client to use
above 20k of outgoing bandwidth, *everything* becomes laggy for some
reason. Most notable is SSH. While I have no accurate way to time the
lag, as near as I can tell it lags about 2 seconds. When I press a key
on my keyboard it takes ~2 seconds to show up in the SSH client. Or, if
I enter lets say "ls" and press enter, it takes roughly 2 seconds for
the ls output to reach me, and while its being displayed, its choppy
appearing (as in it comes in chunks rather than a nice stream).
I see absolutely no reason for this to be happening. Why should anything
lag when I'm using more outgoing bandwidth? Why would more outgoing
bandwidth cause a slow down on incoming bandwidth. Or, why would more
outgoing bandwidth slow down the filters/tc? I've verified that this
happens on more than just my modem. I've used two different routers and
a cable modem. All suffer from the same symptoms.
For the record, my router PC is built as such:
CentOS 5 64bit
AMD Sempron 2800+ (64bit, 1.6Ghz)
2GB of DDR
2GB of swap
As you can see, this PC is more than capable of acting as my router.
I would greatly appreciate any input as to why this torrent problem
keeps poping up. As near as I can tell, it doesn't happen during FTP
upload or any other sort of intensive upload action.
Thanks,
Vadtec
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