Compatible Systems 5.4 - Manual (Page 163)

Chapter 10 - WAN Link Protocols 157
router stops receiving Frame Relay switch maintenance packets, or if all user
PVCs go down.
• If None is selected, failover mode on the port will not be used.
• If Primary is selected, the router will monitor the status of the line
connected to the port. If problems are detected on the line, traffic to this
port will be diverted to the port selected with the Backup Port pull-down
menu as described below.
v Note: This pull-down menu will be disabled and will show “Backup” on a
port which has been selected as a backup for a Primary port.
Backup Port
When the port has been set as a Primary failover port using the Failover Type
pulldown menu, this pulldown allows a backup port to be set. If the line on
the primary port goes down, traffic will be diverted to the designated backup
port.
Once a port has been selected as a backup port for one primary it cannot be
used as a backup for another.
v Note: This pull-down menu will be disabled, renamed to “Primary Port,”
and will show the Primary port’s name on a port which has been selected to
be a backup.
Timers
This button brings up the Failover Timers screen, which controls the amount
of time before traffic is diverted from the Primary to a backup port when a
Primary’s line goes down, and the amount of time before traffic is diverted
back to the Primary port when its line comes back up. The screen is described
later in this chapter.
Allow Dial Out
This checkbox tells the router whether traffic forwarded from other interfaces
on this router will cause an on-demand connection to be established on this
interface. This checkbox can only be set if the Link Type is On Demand PPP
Link.
• If checked, then incoming packets from another interface on this router
whose destination is via this port will initiate a dialing sequence if the
link is not already connected. If the link is already connected, the packets
will simply be forwarded.
• If unchecked, then incoming packets from another interface on this
router will be dropped if the link is not already connected.