Since rebuilding my server, I have been fighting a traffic shaping problem. The symptoms are:
a) HTB classes consistently exceeded their specified ceilings. b) HTB classes reported a large number of 'giants' in the output of "shorewall show tc". Example (I acually saw this class reach the maximum uplink capacity at one point): class htb 1:130 parent 1:1 leaf 130: prio 3 quantum 1500 rate 76000bit ceil 230000bit burst 1537b/8 mpu 0b overhead 0b cburst 1614b/8 mpu 0b overhead 0b level 0 Sent 559018700 bytes 75324 pkt (dropped 0, overlimits 0 requeues 0) rate 269288bit 3pps backlog 0b 0p requeues 0 lended: 53963 borrowed: 21361 giants: 90174 tokens: -26688 ctokens: -14783 I finally traced it to our old friend "checksum offloading". With the Xen 3 package included with OpenSuSE 10.2, it is no longer necessary to run ethtool to get communications to work. *But*, if you don't run "ethtool -K eth0 tx off" in your domUs, traffic shaping in Dom0 *doesn't work*. -Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ [EMAIL PROTECTED] PGP Public Key \ https://lists.shorewall.net/teastep.pgp.key
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