Hi all, I'm using tc to limit ingress throughput per IP dimension. How I do this is installing some tc rules on a bond interface, as the followings: tc qdisc add dev bond1 handle ffff: ingress tc filter add dev bond1 parent ffff: protocol ip prio 1 u32 match ip dst 1.1.1.1/32 police rate 1000mbit burst 100m drop flowid :1 After this setup, iperf shows max bandwidth less than 100Mbps, which is unexpected. Then I've tried to modify some parameters, eventually I find out that changing mtu parameter's value from default 2k to 100k solves this problem. tc filter add dev bond1 parent ffff: protocol ip prio 1 u32 match ip dst 1.1.1.1/32 police rate 1000mbit burst 100m mtu 100k drop flowid :1 Although I can reach 1Gbps finally, I still cannot understand why mtu matters here? AFAIK, mtu limits max packet size travels through tc, so any value greater than 1500 makes no sense since mtu on physical interface is 1500. This is really confusing, hope to get advice from you. Regards. -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
