Step 1:Check your network interfaces
#ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Current message level: 0×00000007 (7)
Link detected: yes
#ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Current message level: 0×00000007 (7)
Link detected: yes
Step 2: Check all the requiured kernel modules are available(bonding and mii)
#modprobe –-list | grep bonding
/lib/modules/2.6.18-92.el5/kernel/drivers/net/bonding/bonding.ko
# modprobe –-list | grep mii
/lib/modules/2.6.18-92.el5/kernel/drivers/net/mii.ko
Step 3: Editing the modprobe.conf file
#vim /etc/modprobe.conf
and add the following lines at the end
alias bond0 bonding
options bond0 mode=1 arp_ip_target=192.168.52.1 arp_interval=200 primary=eth0
To know more about the parameters to be used here use the command
#modinfo bonding
filename: /lib/modules/2.6.18-92.el5/kernel/drivers/net/bonding/bonding.ko
author: Thomas Davis, tadavis@lbl.gov and many others
description: Ethernet Channel Bonding Driver, v3.2.4
version: 3.2.4
license: GPL
srcversion: DB2ABCD47A83F8567EBE92B
depends:
vermagic: 2.6.18-92.el5 SMP mod_unload gcc-4.1
parm: max_bonds:Max number of bonded devices (int)
parm: miimon:Link check interval in milliseconds (int)
parm: updelay:Delay before considering link up, in milliseconds (int)
parm: downdelay:Delay before considering link down, in milliseconds (int)
parm: use_carrier:Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default) (int)
parm: mode:Mode of operation : 0 for balance-rr, 1 for active-backup, 2 for balance-xor, 3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, 6 for balance-alb (charp)
parm: primary:Primary network device to use (charp)
parm: lacp_rate:LACPDU tx rate to request from 802.3ad partner (slow/fast) (charp)
parm: xmit_hash_policy:XOR hashing method: 0 for layer 2 (default), 1 for layer 3+4 (charp)
parm: arp_interval:arp interval in milliseconds (int)
parm: arp_ip_target:arp targets in n.n.n.n form (array of charp)
parm: arp_validate:validate src/dst of ARP probes: none (default), active, backup or all (charp)
parm: fail_over_mac:For active-backup, do not set all slaves to the same MAC. 0 of off (default), 1 for on. (int)
module_sig: 883f35048175a9e6e24e25c96667c37112449509f5739ebf283efa5295d315b73cee5e956f6e25709cbcf2826571c5ffc20f2d87672bb921d610d7
Step 3: Now load the modules
#modprobe bonding
#modprobe mii
This will create a bond0 config file in the networks-scripts directory
Step 4: Editting the three configuration files for eth0,eth1,bond0
|# vim /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=192.168.52.4
USERCTL=no
GATEWAY=192.168.52.1
TYPE=Ethernet
IPV6INIT=no
PEERDNS=yes
#vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no
TYPE=Ethernet
#vim /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no
TYPE=Ethernet
Step5: Restart your networks service
#/etc/init.d/network restart
#ifconfig
