Digi TransPort LR54, Руководство пользователя

Страница: 409 / 1113

Routing Virtual Router Redundancy Protocol (VRRP)
LR54 User Guide 409
(config network ddns new_ddns_instance)> force_interval value
(config network ddns new_ddns_instance)>
where value is any number of weeks, days, hours, minutes, or seconds, and takes the format
number { w|d|h|m|s }.
For example, to set force_interval to ten minutes, enter either 10m or 600s :
(config network ddns new_ddns_instance)> force_interval 600s
(config network ddns new_ddns_instance)>
The default is 3d .
12. (Optional) Set the amount of time to wait for an IP address update to succeed before retrying
the update:
(config network ddns new_ddns_instance)> retry_interval value
(config network ddns new_ddns_instance)>
where value is any number of weeks, days, hours, minutes, or seconds, and takes the format
number { w|d|h|m|s }.
For example, to set retry_interval to ten minutes, enter either 10m or 600s :
(config network ddns new_ddns_instance)> retry_interval 600s
(config network ddns new_ddns_instance)>
The default is 60s .
13. (Optional) Set the number of times to retry a failed IP address update:
(config network ddns new_ddns_instance)> retry_count value
(config network ddns new_ddns_instance)>
where value is any interger. The default is 5 .
14. Save the configuration and apply the change:
(config)> save
Configuration saved.
>
15. Type exit to exit the Admin CLI.
Depending on your device configuration, you may be presented with an Access selection
menu . Type quit to disconnect from the device.
Virtual Router Redundancy Protocol (VRRP)
Virtual Router Redundancy Protocol (VRRP) is a standard for gateway device redundancy and failover
that creates a "virtual router" with a floating IP address. Devices connected to the LAN then use this
virtual router as their default gateway. Responsibility for the virtual router is assigned to one of the
VRRP-enabled devices on a LAN (the "master router"), and this responsibility transparently fails over
to backup VRRP devices if the master router fails. This prevents the default gateway from being a
single point of failure, without requiring configuration of dynamic routing or router discovery
protocols on every host.
Multiple LR54 devices can be configured as VRRP devices and assigned a priority. The router with the
highest priority will be used as the master router. If the master router fails, then the IP address of the