ZyXEL Communications NXC5200 User Manual page 551

Device HA is not working.
• You may need to disable STP (Spanning Tree Protocol).
• The master and its backups must all use the same device HA mode (active-
passive).
• Configure a static IP address for each interface that you will have device HA
monitor.
• Configure a separate management IP address for each interface. You can use it
to access the NXC for management whether the NXC is the master or a backup.
The management IP address should be in the same subnet as the interface IP
address.
• Enable monitoring for the same interfaces on the master and backup NXCs.
• Each monitored interface must have a static IP address and be connected to the
same subnet as the corresponding interface on the backup or master NXC.
• If you have multiple NXC virtual routers on your network, use a different cluster
ID to identify each virtual router. There can only be one master NXC in each
virtual router (same cluster ID).
A broadcast storm results when I turn on Device HA.
Do not connect the bridge interfaces on two NXCs without device HA activated on
both. 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.
I cannot get the RADIUS server to authenticate the NXC's default admin account.
The default admin account is always authenticated locally, regardless of the
authentication method setting.
The NXC fails to authentication the ext-user user accounts I configured.
An external server such as AD, LDAP or RADIUS must authenticate the ext-user
accounts. If the NXC tries to use the local database to authenticate an ext-user,
the authentication attempt will always fail.
NXC5200 User's Guide
Chapter 39 Troubleshooting
551