[CentOS] network problems

Thu Mar 1 16:39:50 UTC 2012
John Doe <jdmls at yahoo.com>

From: "m.roth at 5-cent.us" <m.roth at 5-cent.us>

> I've tried tc qdisc add dev eth0 mq pfifo_fast
> and tc qdisc add dev eth0  pfifo_fast
> and neither works. I've googled, and seen something about you can't set
> something with tc, because pfifo_fast is the hardwired default.

Not an expert, but this seems to add 'mq' succesfully on my unused eth1:
eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
# tc qdisc add dev eth1 root handle 1: mq
eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN qlen 1000

But it fails for 'pfifo_fast':
# tc qdisc add dev eth1 root handle 1: pfifo_fast
qdisc 'pfifo_fast' does not support option parsing

Also, maybe you need to delete before adding?