Chelsio Communications Terminator 6, Инструкция по установке и эксплуатации, Страница: 76 / 432

Chapter III. Virtual Function Network (vNIC)
Chelsio Unified Wire for Linux 76
Software/Driver Configuration and Fine-tuning
4.1. VF Rate Limiting
This section describes the method to rate-limit traffic passing through virtual functions (VFs).
i. The VF rate limit needs to be set on the Host (hypervisor). Apply rate-limiting using:
[root@host~]# ip link set dev mgmtpfXX vf <vf_number> rate <rate_in_mbps>
Here,
•
mgmtpfXX is the management interface to be used. For each PF on which VFs are
instantiated, 1 management interface will be created (in "ifconfig -a").
•
vf_number is the VF on which rate-limiting is applied. Value 0-15.
ii. Run traffic over the VF and the throughput should be rate-limited as per the values set in
the previous step.
Example :
i. 4 VFs are instantiated on PF0.
[root@host~]# modprobe cxgb4
[root@host~]# echo 4 >
/sys/class/net/ethX/device/driver/<bus_id>/sriov_numvfs
ii. 2 VMs are configured with 2 VFs each. 2 different networks are configured with the
following IP configuration:
VM0: VF0 (102.1.1.2/24), VF1 (102.2.2.2/24)
VM1: VF2 (102.1.1.3/24), VF3 (102.2.2.3/24)
iii. VF Rate-limiting is configured on the host:
[root@host~]# ip link set dev mgmtpf10 vf 0 rate 2000
[root@host~]# ip link set dev mgmtpf10 vf 1 rate 3000
The traffic on 102.1.1.X network will be rate-limited to 2Gbps whereas traffic on 102.2.2.X
network will be rate-limited to 3Gbps.