问题
When I run this cmd:
tc qdisc add dev eth0 root red limit 51200000 min 128000 max 512000 avpkt 1024 burst 200 ecn probability 0.5
i get
RTNETLINK answers: No such file or directory
I have configured the kernel for netfilters, and all the networking options in menuconfig.
I don't understand why this error occurs. I'm using iproute2-2.6.23 and Fedora 8.
This was working fine on my laptop, but not on my Desktop PC?
回答1:
On my system your command autoloads the sch_red module. The question is rather old so on a modern system the autoloading should work fine if you have the required module. Check if you miss the kernel module by running:
modprobe sch_red
If it prints nothing, then retry running tc command and see if it helps.
If not, ensure you have CONFIG_NET_SCH_RED (Random Early Detection) compiled in your kernel. More info at kernel documentation.
来源：https://stackoverflow.com/questions/4803069/rtnetlink-answers-no-such-file-or-directory