Define all host names and IP addresses used in a Redundant line Control Function in the /etc/hosts files of the local system.
When modifying the length of MTU for an interface, set the same value for the configuration file (ifcfg-ethX) of the primary interface and the secondary interface. The changed value is valid after a system reboot.
# cat /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 (...) MTU=9000 # cat /etc/sysconfig/network-scripts/ifcfg-eth2 DEVICE=eth2 (...) MTU=9000 |
Multicast IP addresses cannot be used.
An IPv6 over IPv4 tunneling interface (sitX) is not supported.
If a user individually activates or deactivates physical interfaces bundled by the virtual interface, the interface status monitoring feature restores them to their original state on the operation.
It is not possible to use DHCP (a server function and a client function) as the upper application.
One unit of HUB to be connected in NIC switching mode is sufficient, but communication may not be conducted normally if the HUB has MAC learning capabilities. In such a case, add a HUB to make a HUB-to-HUB connection and then connect the cable to each HUB (See Figure 2.7 System configuration in NIC switching mode of "2.1.2 NIC switching mode").
It is necessary to use a HUB that can set an IP address when using an error monitoring using the ping command. If a HUB cannot be assigned an IP address, an IP address of a device connected to the HUB can be monitored. However, it should be noted that if the device whose IP address is monitored fails, the failure is regarded as a transfer route failure.
When using the IPv6 virtual interface, the radvd daemon is occasionally restarted not to delay configuring the IPv6 address automatically due to the LinkUp delay of Ethernet. The message "radvd[XXXX]: resuming normal operation" is output from the radvd daemon following this. However, this is not an error.
Do not configure the server running NIC switching mode as an IPv6 router.
If the firewalld service is enabled, the virtual interface works in the default zone after the OS is restarted, depending on the OS version.
Check the zone where the virtual interface works by using the firewall-cmd --get-active-zones command.
If the following kernel parameters were set when using the IPv6 communication, delete the settings from the kernel parameters configuration files. Otherwise, the kernel parameters set by GLS are overwritten and GLS may not operate properly.
net.ipv6.conf.all.disable_ipv6 = X net.ipv6.conf.default.disable_ipv6 = X net.ipv6.conf.<dev>.disable_ipv6 = X |
X: Value
<dev>: NIC bundled by the virtual interface of GLS
Kernel parameters configuration files that the target value is set are as follows.
OS | Kernel parameters configuration files |
|---|---|
RHEL7 | /etc/sysctl.conf |
RHEL8 | /etc/sysctl.conf |
