bond interfaces in Xen

CentOS 5.2 x86_64 / RHEL 5U2

bond type: 802.3ad

We're going to bond eth0 and eth1 in a 802.3ad bond (bond0), and make that the primary bridge for Xen (xenbr0). It will be in vlan access mode (i.e. no vlan trunk). It will also be the primary interface for dom0. Eth2 and Eth3 are present, but not used.

Configure the switchports where eth0 and eth1 are plugged in for 802.3ad, lacp.

/etc/modprobe.conf (bond interface must be first, then load drivers for other network interfaces)

alias bond0 bonding
alias eth0 e1000
alias eth1 e1000
alias eth2 e1000
alias eth3 e1000

change this line in /etc/xen/xend-config.sxp

(network-script 'network-bridge netdev=bond0')

Ensure you have a line in /etc/sysconfig/network to define that bond0 should be used as the default gateway:

GATEWAYDEV=bond0

/etc/sysconfig/network-scripts/ifcfg-bond0 (adjust for your ip settings, use a unique MAC address):

DEVICE=bond0
IPADDR=10.10.10.119
MACADDR=00:00:10:01:01:19
NETMASK=255.255.255.0
NETWORK=10.10.10.0
BROADCAST=10.10.10.255
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
BONDING_OPTS="mode=4 miimon=100"

/etc/sysconfig/network-scripts/ifcfg-eth0 (adjust according to your device's true mac address):

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
MASTER=bond0
SLAVE=yes
HWADDR=00:1E:68:37:FA:92

/etc/sysconfig/network-scripts/ifcfg-eth1 (adjust according to your device's true mac address):

DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
MASTER=bond0
SLAVE=yes
HWADDR=00:1E:68:37:FA:93

/etc/sysconfig/network-scripts/ifcfg-eth2 (adjust according to your device's true mac address):

DEVICE=eth2
BOOTPROTO=dhcp
HWADDR=00:1E:68:37:FA:94
ONBOOT=no

/etc/sysconfig/network-scripts/ifcfg-eth3 (adjust according to your device's true mac address):

DEVICE=eth3
BOOTPROTO=dhcp
HWADDR=00:1E:68:37:FA:95
ONBOOT=no