Configure Bridge Based On Ethernet NIC

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

• Compute node cn1 has one physical NIC: eth1

• User wants to configure 1 bridge br1 based on eth1

• Assign ip 30.5.106.9 to br0

Add network object into the networks table

Add/modify the network net30 in the networks table

chdef -t network net30 net=30.0.0.0 mask=255.0.0.0

Define attributes in the nics table

1. Compute node cn1 has one physical NIC: eth1

   chdef cn1 nictypes.eth1=ethernet
   

2. Define bridge br1 based on eth1

   chdef cn1 nictypes.br1=bridge nicdevices.br1="eth1"
   chdef cn1 nicips.br1=30.5.106.9
   

3. Define nicnetworks for br1

   chdef cn1 nicnetworks.br1=net30
   

Enable confignetwork to configure bridge

1. If add 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 configure files in ifcfg-br1 under /etc/sysconfig/network-scripts/

TYPE=Bridge
STP=on

Check ifcfg-eth1 under /etc/sysconfig/network-scripts/

BRIDGE=br1

Use ip addr command to check if br1, eth0.6 and eth0.7 are correct.