ZyXEL Communications 110, 1100, 310 26.5 Device HA Technical Reference

Chapter 26 Device HA

The following table describes the labels in this screen.

Table 131 Configuration > Device HA > Active-Passive Mode > Edit

LABEL	DESCRIPTION
Enable	Select this to have device HA monitor the status of this interface’s connection.
Monitored
Interface
Interface Name	This identifies the interface.
	Note: Do not connect the bridge interfaces on two ZyWALLs without device HA activated on
	both. Doing so could cause a broadcast storm.
	Either activate device HA before connecting the bridge interfaces or disable the bridge
	interfaces, connect the bridge interfaces, activate device HA, and finally reactivate the
	bridge interfaces.
Virtual Router IP	This is the interface’s (static) IP address and subnet mask in the virtual router. Whichever
(VRIP) / Subnet	ZyWALL is currently serving as the master uses this virtual router IP address and subnet
Mask	mask. These fields are blank if the interface is a DHCP client or has no IP settings.
Manage IP	Enter the interface’s IP address for management access. You can use this IP address to
	access the ZyWALL whether it is the master or a backup. This management IP address
	should be in the same subnet as the interface IP address.
Manage IP	Enter the subnet mask of the interface’s management IP address.
Subnet Mask
OK	Click OK to save your changes back to the ZyWALL.
Cancel	Click Cancel to exit this screen without saving your changes.

26.5 Device HA Technical Reference

Active-Passive Mode Device HA with Bridge Interfaces

Here are two ways to avoid a broadcast storm when you connect the bridge interfaces on two ZyWALLs.

First Option for Connecting the Bridge Interfaces on Two ZyWALLs

The first way is to activate device HA before connecting the bridge interfaces as shown in the following example.

1Make sure the bridge interfaces of the master ZyWALL (A) and the backup ZyWALL (B) are not connected.

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	ZyWALL 110/310/1100 Series User’s Guide