Hi
all,
I'm having
some problems setting up qdiscs on a bridge.The config looks a little like
this:
ifconfig ifb0
up # Bring up the IFB for this
bridge.
tc qdisc add dev
eth2 ingress
tc qdisc add dev eth3 ingress
tc qdisc add dev ifb0 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
# Raw qdiscs on each bridge port
tc qdisc add dev eth2 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
tc qdisc add dev eth3 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
tc qdisc add dev eth3 ingress
tc qdisc add dev ifb0 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
# Raw qdiscs on each bridge port
tc qdisc add dev eth2 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
tc qdisc add dev eth3 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
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 # mark packets for VLAN 3000.
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 # mark packets for VLAN 3000.
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 # mark packets for VLAN 3000.
tc class add dev
eth2 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate 2000Kbit weight 200Kbit
prio 1 allot 1514 cell 8 maxburst 20 avpkt 1000 bounded
isolated # 2000 Kbit rate limit on entry
point.
tc class add dev eth3 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate 2000Kbit weight 200Kbit prio 1 allot 1514 cell 8 maxburst 20 avpkt 1000 bounded isolated # 2000 Kbit rate limit on entry point.
tc class add dev eth3 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate 2000Kbit weight 200Kbit prio 1 allot 1514 cell 8 maxburst 20 avpkt 1000 bounded isolated # 2000 Kbit rate limit on entry point.
tc qdisc add dev
eth2 parent 1:1 handle 2: cbq bandwidth 100Mbit avpkt 1000 cell 8
tc qdisc add dev eth3 parent 1:1 handle 2: cbq bandwidth 100Mbit avpkt 1000 cell 8
tc qdisc add dev eth3 parent 1:1 handle 2: cbq bandwidth 100Mbit avpkt 1000 cell 8
tc class add dev eth2 parent 2:0 classid 2:1 cbq
bandwidth 100Mbit rate 2000Kbit weight 200Kbit prio 2 allot 1514 cell 8 maxburst
20 avpkt 1000 sharing
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 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 qdisc add dev eth2 parent 2:1 handle 3: cbq
bandwidth 100Mbit avpkt 1000 cell 8
tc filter add dev eth2 parent 3:0 protocol 0x8100
prio 4 u32 match u32 0 0 flowid
3:3
# Traffic class 3 - catchall. Don't MARK further.
(There's lot's more,
mostly a repeat of the above with different criteria.)
When I first boot
the box, and apply the traffic shaping before any traffic flows, all is fine.
However, if I apply this same config whilst the bridge is passing lots of
traffic, it completely crashes the box. Everything freezes, I don't even get a
kernel panic message on the console. Nothing responds and the only way to
recover is by a power-cycle.
If I take the link
down on the ethernet port (with ip link set ethx down), apply the configs, and
then bring it back up again, all is OK. Obviously, though, this isn't really
acceptable.
It always crashes
immediately after a 'tc qdisc add...' line, but not always in the same place.
Are there any known issues with adding qdiscs whilst traffic is being queued on
it?
I've also tried it
using HTB instead of CBQ, and I get the same results.
Anybody got any
other ideas as to what might be going on?
Regards,
Leigh
Leigh
Leigh Sharpe
Network Systems Engineer
Pacific Wireless
Ph +61 3 9584 8966
Mob 0408 009 502
Network Systems Engineer
Pacific Wireless
Ph +61 3 9584 8966
Mob 0408 009 502
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