On Tue, 20 Mar 2007 04:51:53 +0530 (IST)
dhananjay.tembe@calsoftinc.com wrote:
>
> 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 started a TCP traffic between this bond (2gbit bandwidth) and a
> remote nic (1gbit bandwidth).
> Without qos, bond was transmitting at 960Mbps.
> After I executed above mentioned commands, it was expected that the
> bond will transmit at 400Mbps but it was transmitting only at 70Mbps.
> Same thing was observed with different qos rates for class 1:2,
> outbound traffic through bond was very less than the rate specified
> in the tc command.
>
> Is getting poor performance after running tc over a bond is a known
> issue? Please help me with this issue.
Perhaps you can use an IMQ device for traffic control/shaping.
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