C.6.2 Setup example for creating a highly reliable network of guest domains on KVM hosts (Tagged VLAN)

This section describes a configuration setup example for the following network configuration.

1) Setting up the system

1-1) Define the IP addresses and host names you use in the /etc/hosts file.

192.168.80.1    hosta    # virtual IP address of the KVM host
192.168.80.100  swhub1   # IP address of the primary monitoring destination's HUB
192.168.80.101  swhub2   # IP address of the secondary monitoring destination's HUB

1-2) Edit the /etc/sysconfig/network-scripts/ifcfg-ethX files (X is 0,1) as follows:

For RHEL7

Contents of /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
BOOTPROTO=static
HOTPLUG=no
ONBOOT=yes
DEVICETYPE=hanet

Contents of /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
BOOTPROTO=static
HOTPLUG=no
ONBOOT=yes
DEVICETYPE=hanet

For RHEL8 or later
- Contents of /etc/sysconfig/network-scripts/ifcfg-eth0
  TYPE=Ethernet BOOTPROTO=none DEVICE=eth0 ONBOOT=yes
- Contents of /etc/sysconfig/network-scripts/ifcfg-eth1
  TYPE=Ethernet BOOTPROTO=none DEVICE=eth1 ONBOOT=yes

2) Creating a virtual interface

/opt/FJSVhanet/usr/sbin/hanetconfig create -n sha0 -m v -t eth0,eth1

3) Setting the virtual bridge

Create /etc/sysconfig/network-scripts/ifcfg-br0 as a new interface setup file for the virtual bridge.

For RHEL7
- Contents of /etc/sysconfig/network-scripts/ifcfg-br0
  DEVICE=br0 TYPE=Bridge BOOTPROTO=static ONBOOT=yes DELAY=0
For RHEL8 or later
- Contents of /etc/sysconfig/network-scripts/ifcfg-br0
  DEVICE=br0 TYPE=Bridge BOOTPROTO=none ONBOOT=yes DELAY=0

4) Setting a virtual interface

For RHEL7
Define an IP address or a subnet mask in the /etc/sysconfig/network-scripts/ifcfg-sha0 file.
- Contents of /etc/sysconfig/network-scripts/ifcfg-sha0
  DEVICE=sha0 IPADDR=192.168.80.1 NETMASK=255.255.255.0 BOOTPROTO=static ONBOOT=yes DEVICETYPE=sha HOTPLUG=no

For RHEL8 or later
Define an IP address or a prefix in the /etc/sysconfig/network-scripts/ifcfg-sha0 file.
- Contents of /etc/sysconfig/network-scripts/ifcfg-sha0
  DEVICE=sha0 IPADDR=192.168.80.1 PREFIX=24 BOOTPROTO=none ONBOOT=yes TYPE=Ethernet

5) Adding a tagged VLAN interface

To add the tagged VLAN interface sha0.10 on the virtual interface sha0, add the /etc/sysconfig/network-scripts/ifcfg-sha0.10 file. In addition, define the virtual bridge name (BRIDGE=br0) of the connection target.

For RHEL7

Contents of /etc/sysconfig/network-scripts/ifcfg-sha0.10

DEVICE=sha0.10
BOOTPROTO=static
ONBOOT=yes
DEVICETYPE=sha
BRIDGE=br0
VLAN=yes

For RHEL8 or later
- Contents of /etc/sysconfig/network-scripts/ifcfg-sha0.10
  VLAN=yes TYPE=Vlan PHYSDEV=sha0 VLAN_ID=10 BOOTPROTO=none BRIDGE=br0

6) Setting the network monitoring function

/opt/FJSVhanet/usr/sbin/hanetpathmon target -n sha0 -p 192.168.80.100,192.168.80.101

For RHEL7

7) Reboot

Run the following command to reboot the system.

/sbin/shutdown -r now

For RHEL8 or later

7) Setting /etc/NetworkManager/NetworkManager.conf

Describe the tagged VLAN interface, which is set in step 5), in /etc/NetworkManager/NetworkManager.conf.

Contents of /etc/NetworkManager/NetworkManager.conf
[main] ... ignore-carrier=sha0.10

Note

The setting of /etc/NetworkManager/NetworkManager.conf is required to control the processing of NetworkManager for tagged VLAN interfaces and manage the processing in GLS. Make sure to set /etc/NetworkManager/NetworkManager.conf.

8) Reboot

Run the following command to reboot the system.

/sbin/shutdown -r now