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When you deploy a vNIOS HA pair, ensure that the port connection allows for more than one MAC address per vNIC. For example, if you deploy a vNIOS HA pair in VMware vSphere, the port-profile to which the vNIOS HA and LAN ports connect should allow for more than one MAC address per vNIC. You can do this by changing the security settings of the port-group to accept "MAC address changes" and "Forged transmits," as illustrated in Figure 5.10.
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You can enable ARP (Address Resolution Protocol) on the passive node of an HA pair and monitor its status externally. For example, when the active node of an HA pair fails over to the passive node, you can ping the passive node from an external location and monitor its status. By default, ARP is disabled on the passive node of an HA pair. ARP settings on an HA member are preserved during a system restart or reboot, HA switch over, and upgrade. In addition, you do not need to restart the appliance when you modify ARP settings. When the active node becomes passive during an HA failover, ARP on an HA member inherits the settings configured in the database.
You can view detailed status for both nodes of an HA pair through the Detailed Status panel. To view the Detailed Status panel, from the Grid tab, select the Grid Manager tab -> Members tab -> Grid_member check box -> Detailed Status icon in the horizontal navigation bar. In the Detailed Status panel, you can view ARP connectivity status for the passive node of an HA pair (Green = The passive HA node is connected to the local router; Yellow = The passive HA node fails to connect to the local router; Gray = ARP is disabled on the passive node of an HA pair). The passive HA node uses arping to test the ARP connectivity with the local router. If the local router is not configured, you may see false warnings even if the ARP connectivity is fine. In case of an ARP connectivity failure, the appliance sends an SNMP trap and an email notification, if configured.
Note that the ARP setting is not preserved on a passive HA node when you reset the appliance using the CLI command
reset all or reset the database using the CLI command reset database. To enable ARP on an HA passive node:
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Note: For a dual mode (IPv4 and IPv6) HA Master or HA member, you can set either IPv4 or IPv6 for VRRP advertisements.
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