Tc Seems To Have No Effect On The NIC’s
Hello all,
We have installed this network testing environment:
https://github.com/facebook/augmented-traffic-control
which seems pretty nice overall.
It allows you to artificially degrade your network performance by issuing tc commands to directly affect your networking.
I have it set up on two CentOS 6 machines – one a Dell server, one a VirtualBox VM. The tc syntax seems OK, it seems to all make sense – only it seems to have no effect whatsoever on the actual network performance.
Hence the question: is there a known issue with tc? Am I perhaps missing some kernel modules, or do I perhaps now have some kernel parameters set correctly?
Any insight will be helpful.
Thanks in advance,
Cheers,
Boris.
One thought on - Tc Seems To Have No Effect On The NIC’s
Hi Boris,
Maybe it’s just not matching your traffic and thus putting it in the main class, lets say.
You can check how it’s going on with
tc -s qdisc show dev DEV
and
tc -s class show dev DEV
Both have some interestings stats that you can watch using watch -d and check through where your traffic is flowing.
If the numbers you want to are not changing, you’re probably missing the tc filters for matching them.
Marcelo