Configuring bridging, bonding, vlans on CentOS/RedHat 6.x
/etc/sysconfig/network-scripts/ifcfg-em1 and em2
DEVICE=<device-name> ONBOOT=yes HWADDR=XX:XX:XX:XX:XX:XX
/etc/sysconfig/network-scripts/ifcfg-em1.vlanid (example ifcfg-em1.20)
DEVICE=<device>.<vlanid> ONBOOT=yes VLAN=yes BOOTPROTO=none SLAVE=yes MASTER=bond
/etc/sysconfig/network-scripts/ifcfg-bond (example ifcfg-bond20)
DEVICE=bond<vlanid> ONBOOT=yes BONDING_OPTS="mode=active-backup primary=em1 miimon=100" BOOTPROTO=none BRIDGE=br<vlanid> MACADDR=<RANDOM_MAC>
/etc/sysconfig/network-scripts/ifcfg-br (example ifcfg.br20)
DEVICE=br<vlanid> ONBOOT=yes TYPE=Bridge DELAY=0 BOOTPROTO=static IPADDR=X.X.X.X NETMASK=X.X.X.X
So, creating 3 vlans (20, 200, 250) on a 2 interface bond (em1, em2) creates the following set of configfiles:
| ifcfg-em1: | Base configuration for em1 |
|---|---|
| ifcfg-em2: | Base configuration for em2 |
| ifcfg-em1.20: | Vlan 20 interface on em1 interface |
| ifcfg-em1.200: | Vlan 200 interface on em1 interface |
| ifcfg-em1.250: | Vlan 250 interface on em1 interface |
| ifcfg-em2.20: | Vlan 20 interface on em2 interface |
| ifcfg-em2.200: | Vlan 200 interface on em2 interface |
| ifcfg-em2.250: | Vlan 250 interface on em2 interface |
| ifcfg-bond20: | Bonding em1.20 with em2.20 |
| ifcfg-bond200: | Bonding em1.200 with em2.200 |
| ifcfg-bond250: | Bonding em1.250 with em2.250 |
| ifcfg-br20: | Create a bridge on bond20 |
| ifcfg-br200: | Create a bridge on bond200 |
| ifcfg-br250: | Create a bridge on bond250 |