Configure BOND, VLAN and BRIDGES
The following example set the xCAT properties for compute node cn1
to achieve the following network configuration using the confignetwork
postscript:
Compute node
cn1
has two physical NICs:eth2
andeth3
Bond
eth2
andeth3
asbond0
From
bond0
, create 2 VLANs:bond0.1
andbond0.2
Make bridge
br1
usingbond0.1
with IP (10.0.0.1)Make bridge
br2
usingbond0.2
with IP (20.0.0.1)
Define the additional networks to xCAT
If this is a new network being created on the compute nodes, an entry needs to be created into the xCAT database.
The nicnetworks
attribute only defines the nic that uses the IP address.
Other information about the network should be defined in the networks
table.
Add/modify the networks in the networks
table
chdef -t network net10 net=10.0.0.0 mask=255.0.0.0
chdef -t network net20 net=20.0.0.0 mask=255.0.0.0
Define attributes in the nics
table
Compute node
cn1
has two physical NICs:eth2
andeth3
chdef cn1 nictypes.eth2=ethernet nictypes.eth3=ethernet
Define
bond0
and bondeth2
andeth3
asbond0
chdef cn1 nictypes.bond0=bond \ nicdevices.bond0="eth2|eth3"
From
bond0
, create 2 VLANs:bond0.1
andbond0.2
chdef cn1 nictypes.bond0.1=vlan \ nictypes.bond0.2=vlan \ nicdevices.bond0.1=bond0 \ nicdevices.bond0.2=bond0
Create bridge
br1
usingbond0.1
with IP (10.0.0.1)chdef cn1 nictypes.br1=bridge \ nicdevices.br1=bond0.1 \ nicips.br1=10.0.0.1 \ nicnetworks.br1="net10"
Create bridge
br2
usingbond0.2
with IP (20.0.0.1)chdef cn1 nictypes.br2=bridge \ nicdevices.br2=bond0.2 \ nicips.br2=20.0.0.1 \ nicnetworks.br2="net20"
Add confignetwork
into the node’s postscripts list
Use the following command to add
confignetwork
into postscript list to execute on reboot:chdef cn1 -p postscripts=confignetwork
If the compute node is already running, use
updatenode
command to runconfignetwork
postscript without rebooting the node:updatenode cn1 -P confignetwork
Check result
Use ip
command on cn1
to check all NICs
xdsh cn1 "ip addr"
Check all network configuration files under /etc/sysconfig/network-scripts/
.