[LARTC] Re: TC not working well with bonded nics please help

[Amin Azez]

* dhananjay.tembe at calsoftinc.com wrote, On 19/03/07 23:21:
> Hi,
>       I am facing a problem when I run tc on the bonded nic cards.
> When I run tc on a single nic card, it worked perfectly fine. But when I
> run tc on a bond of two nics, tc gives poor performance.  The two nics
> were bonded in round-robin (load balancing) mode. I created a qdisc, class
> and a filter as follows:
> 
> tc qdisc add dev bond0 root handle 1: htb
> tc class add dev bond0 parent 1: classid 1:1 htb rate 240mbps
> tc class add dev bond0 parent 1:1 classid 1:2 htb rate 50 ceil 50 quantum
> 1500

I may have missed something, but why did you expect a transmit rate of
400mbps?

Has anything else changed besides the bond? If your traffic is not sent
evenly and burst or cburst aren't big enough to buffer the data until
transmit, then it will be dropped reducing your throughput.

How are you calculating the transmit rate; is the transmit rate actually
70mbps or is that the tcp send rate, maybe due to retransmission because
of tc drops?

Sam