PRIMECLUSTER Global Link Services Configuration and Administration Guide: Redundant Line Control Function 4.1 (for Linux)

3.3.2 NIC switching mode

The procedure to add the configuration information using NIC unused in the other virtual interfaces is as follows:

1. Set up a virtual interface using the "hanetconfig create" command. For information, see "7.1 hanetconfig Command".
2. Set up the standby patrol function using the "hanetconfig create" command (only if the standby patrol function is used). For information, see "7.1 hanetconfig Command".
3. Set up the HUB monitoring function using the "hanetpoll create" command. For information, see "7.7 hanetpoll Command".
4. Setup a subnet mask to a virtual IP address using the "hanetmask create" command. For information, see "7.5 hanetmask Command".

The procedure to share NIC used in a virtual interface of the already defined NIC switching mode and to add the configuration information is as follows (when using an NIC sharing function):

1. Set a virtual interface with "hanetconfig copy" command. See "7.1 hanetconfig Command" for the detail.
2. Set standby patrol with "hanetconfig create" command. (Only when using a standby patrol function.) It is not necessary to set if a standby patrol function is already set in a virtual interface that already shares NIC. See "7.1 hanetconfig Command" for the detail.
3. Set a HUB monitoring function with "hanetpoll copy" command. See "7.7 hanetpoll Command" for the detail.
4. Setup a subnet mask to a virtual IP address using the "hanetmask create" command. For information, see "7.5 hanetmask Command".

• When setting the definition information of NIC switching mode, if virtual interfaces of the other NIC switching modes are already working, already working, it is necessary to stop them once to make the added information valid. Therefore, deactivate GLS temporarily using "stphanet" command and then execute "strhanet" command to restart it. In cluster operation, reactivate a userApplication of NIC switching mode.
• In NIC switching mode, physical interfaces are activated or deactivated when switching over the transfer path. However, these logs might not be recorded according to the state of the definition. Please refer to "3.6.6.4 Setting up system log for interface up/down" for the method of recording these logs.
• Ensure to specify the same IP address configured in /etc/sysconfig/network-scripts/ifcfg-ethX when specifying physical IP address by "hanetconfig" command using '-i' or '-e' option. If you specify different physical IP address, it disturbs communication using physical interface because this IP address will overwrite the physical IP address specified with "hanetconfig" command when activating the virtual interface.
• If your HUB is using STP (Spanning Tree Protocol), NIC switching occurs while a failure does not occur on a transmission route. In such a case, it is necessary to tune a monitoring parameter of the HUB monitoring function. See "7.7 hanetpoll Command" or "D.1.3.1 Switching takes place in NIC switching mode regardless of failure at the monitoring end".