Configure VLAN 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 bond0.1 based on bond0

  • Assign ip 40.0.0.1 to the bridge interface bond0.1

Add network object into the networks table

Add/modify the network net40 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 VLAN bond0.1 based on bond0

    chdef cn1 nicips.bond0.1=40.0.0.1 nictypes.bond0.1=vlan

  4. Define nicnetworks for bond0.1

    chdef cn1 nicnetworks.bond0.1=net40

  5. Define nichostnamesuffixes for bond0.1 in case makehosts to update /etc/hosts, since the value for nichostnamesuffixes cannot contain “.”, other characters are recommended instead of “.”, like following:

    chdef cn1 nichostnamesuffixes.bond0.1=-bond0-1

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 VLAN

Login to compute node cn1 and check ifcfg-bond0.1 under /etc/sysconfig/network-scripts/

DEVICE="bond0.1"
BOOTPROTO="static"
IPADDR="40.0.0.1"
NETMASK="255.0.0.0"
NAME="bond0.1"
ONBOOT="yes"
USERCTL=no
VLAN=yes

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