Chelsio Communications Chelsio T4, Installation And User Manual

Page: 191 / 511

Chapter XII. Offload Bonding driver
Chelsio T5/T4 Unified Wire for Linux
Page 191
4. Software/Driver Configuration and Fine-tuning
4.1. Offloading TCP traffic over a bonded interface
The Chelsio Offload Bonding driver supports all the bonding modes in NIC Mode. In offload
mode (t4_tom loaded) however, only the
balance-rr (mode=0) , active-backup (mode=1) ,
balance-xor (mode=2) and 802.3ad (mode=4) modes are supported.
To offload TCP traffic over a bonded interface, use the following method:
i. Load the network driver with TOE support:
[root@host~]# modprobe t4_tom
ii. Create a bonded interface:
[root@host~]# modprobe bonding mode=1 miimon=100
iii. Bring up the bonded interface and enslave the interfaces to the bond:
[root@host~]# ifconfig bond0 up
[root@host~]# ifenslave bond0 ethX ethY
iv. Assign IPv4/IPv6 address to the bonded interface:
[root@host~]# ifconfig bond0 X.X.X.X/Y
[root@host~]# ifconfig bond0 inet6 add <128-bit IPv6 Address> up
v. Disable FRTO on the PEER:
[root@host~]# sysctl -w net.ipv4.tcp_frto=0
All TCP traffic will be offloaded over the bonded interface now.
ethX and ethY are interfaces of the same adapter.
Note