Usage; Non-Offloaded Connections; Offloaded Connections - Chelsio Communications Chelsio T5 Installation And User Manual

XIX. Traffic Management

5. Usage

5.1.

Non-Offloaded Connections

The following example demonstrates the method to rate limit all TCP connections on class 0 to
a rate of 300 Mbps for Non-offload connections:
1. Load the Network driver in NIC mode.
[root@host]# modprobe cxgb4
2. Bind connections with destination IP address 192.168.5.3 to NIC TX queue 3
[root@host]# tc qdisc add dev eth0 root handle 1: multiq
[root@host]# tc filter add dev eth0 parent 1: protocol ip prio 1 u32
ip dst 192.168.5.3 action skbedit queue_mapping 3
3. Bind the NIC TX queue to class 0
[root@host]# cxgbtool eth0 sched-queue 3 0
4. Set the appropriate rule for class 0
[root@host]# cxgbtool eth0 sched-class params
mode class rate-unit bits
300000 pkt-size 1460
5.2.

Offloaded Connections

The following example demonstrates the method to rate limit all TCP connections on class 0 to
a rate of 300 Mbps for offloaded connections:
1. Load the Network driver in TOE mode
[root@host]# modprobe t4_tom
Chelsio T5/T4 Unified Wire For Linux
rate-mode absolute channel 0
type packet level cl-rl
class 0 max-rate
match
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