Hi all,
After configurating tc, there is a overlimits:
[root@mailredhat root]# tc -s qdisc
qdisc sfq 8030: dev ppp0 quantum 1514b perturb 15sec
Sent 9505059 bytes 6445 pkts (dropped 0, overlimits 0)
qdisc sfq 802f: dev ppp0 quantum 1514b perturb 15sec
Sent 154284 bytes 897 pkts (dropped 0, overlimits 0)
qdisc cbq 10: dev ppp0 rate 112Kbit (bounded,isolated) prio no-transmit
Sent 9662343 bytes 7344 pkts (dropped 0, overlimits 1710)
borrowed 0 overactions 0 avgidle 57142 undertime 0
in the root qdisc, the overlimits is 1710.
1) What does "overlimits" mean?
2) How to avoid overlimits?
3) Below is the tc config, why only root qdisc has overlimits?
the child qdisc does not have?
tc qdisc add dev ppp0 root handle 10: cbq bandwidth 112Kbit avpkt 1000
tc class add dev ppp0 parent 10:0 classid 10:100 cbq bandwidth 112Kbit rate 57Kb
it allot 1514 weight 5Kbit prio 2 maxburst 20 avpkt 1000 isolated
tc class add dev ppp0 parent 10:0 classid 10:200 cbq bandwidth 112Kbit rate 55Kb
it allot 1514 weight 5Kbit prio 8 maxburst 20 avpkt 1000 bounded
tc qdisc add dev ppp0 parent 10:100 sfq quantum 1514b perturb 15
tc qdisc add dev ppp0 parent 10:200 sfq quantum 1514b perturb 15
tc filter add dev ppp0 parent 10:0 protocol ip prio 2 u32 match ip tos 0x8 0xff
flowid 10:100
tc filter add dev ppp0 parent 10:0 protocol ip prio 8 u32 match ip tos 0x00 0xff
flowid 10:200
