Setting max latency on classful qdiscs
"Leigh Sharpe" <[email protected]>
| Newsgroups | gmane.linux.network.routing |
|---|---|
| Message-ID | <[email protected]> |
Hi All,
I'm using HTB to shape traffic, a little like this:
tc qdisc add dev eth2 root handle 1:0 htb
tc qdisc add dev eth3 root handle 1:0 htb
tc filter add dev eth2 parent 1: protocol 0x8100 prio 5 u32 match u16
3000 0x0fff at 0 flowid 1:1 action ipt -j MARK --or-mark 0x01000000
tc filter add dev eth3 parent 1: protocol 0x8100 prio 5 u32 match u16
3000 0x0fff at 0 flowid 1:1 action ipt -j MARK --or-mark 0x01000000
tc class add dev eth2 parent 1:0 classid 1:1 htb rate 2000Kbit ceil
2000Kbit
tc class add dev eth3 parent 1:0 classid 1:1 htb rate 2000Kbit ceil
2000Kbit
tc qdisc add dev eth2 parent 1:1 handle 2: htb
tc qdisc add dev eth3 parent 1:1 handle 2: htb
tc class add dev eth2 parent 2:0 classid 2:1 htb rate 2000Kbit
tc class add dev eth3 parent 2:0 classid 2:1 htb rate 2000Kbit
tc filter add dev eth2 parent 2:0 protocol 0x8100 prio 2 u32 match u16
3000 0x0fff at 0 flowid 2:1 action ipt -j MARK --or-mark 0x00100000
tc filter add dev eth3 parent 2:0 protocol 0x8100 prio 2 u32 match u16
3000 0x0fff at 0 flowid 2:1 action ipt -j MARK --or-mark 0x00100000
This essentially provides a 2mbit/s rate limit on each of eth2 and eth3.
However, when I attempt to put more than 2mbps through it, It gets quite
latent (I end up with >1second latency at times). Is there any way of
specifying the maximum latency on a HTB class or qdisc? Or CBQ, for that
matter? I need to use a classful qdisc, so tbf is out of the question.
Ideally, I want to be able to specify that packets get dropped if they
are in the queue for any longer than a specified period of time.
Any ideas?
Regards,
Leigh
Leigh Sharpe
Network Systems Engineer
Pacific Wireless
Ph +61 3 9584 8966
Mob 0408 009 502
Helpdesk 1300 300 616
email [email protected]
<blocked::mailto:[email protected]>
web www.pacificwireless.com.au
<blocked::http://www.pacificwireless.com.au/>
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