Configure Bridge Based on Bond Adapters

The following example sets the xCAT properties for compute node cn1 to create:

  • Compute node cn1 with two physical NICs: eth2 and eth3

  • Bond eth2 and eth3 as bond0

  • Create bridge br0 based on bond0

  • Assign ip 40.0.0.1 to the bridge interface br0

Add network object into the networks table

Add/modify network data in the networks table

chdef -t network net40 net=40.0.0.0 mask=255.0.0.0

Define attributes in the nics table

  1. Compute node cn1 has two physical NICs: eth2 and eth3

    chdef cn1 nictypes.eth2=ethernet nictypes.eth3=ethernet

  2. Define bond0 and bond eth2 and eth3 as bond0

    chdef cn1 nictypes.bond0=bond nicdevices.bond0="eth2|eth3"

  3. Define br0 based on bond0

    chdef cn1 nicips.br0=40.0.0.1 nictypes.br0=bridge

  4. Define nicnetworks for br0

    chdef cn1 nicnetworks.br0=net40

Enable confignetwork to configure bridge

  1. If adding confignetwork into the node’s postscripts list, confignetwork will be executed during OS deployment on compute node

    chdef cn1 -p postscripts=confignetwork

  2. Or if the compute node is already running, use updatenode command to run confignetwork postscript

    updatenode cn1 -P confignetwork

Verify bridge

Login to compute node cn1 and check bonding options in /etc/sysconfig/network-scripts/ifcfg-bond0 file

DEVICE="bond0"
BOOTPROTO="none"
NAME="bond0"
BONDING_MASTER="yes"
ONBOOT="yes"
USERCTL="no"
TYPE="Bond"
BONDING_OPTS="mode=802.3ad miimon=100"
DHCLIENTARGS="-timeout 200"
BRIDGE=br0

Check ifcfg-br0 under /etc/sysconfig/network-scripts/

DEVICE="br0"
BOOTPROTO="static"
IPADDR="40.0.0.1"
NETMASK="255.0.0.0"
NAME="br0"
ONBOOT="yes"
STP="on"
TYPE="Bridge"

Use ip addr command to check if br0 and bond0 are correct.