Product specifications

Chapter 6: Connection Management Efficient Networks
®
Router family
Command Line Interface Guide
Page 6-12 Efficient Networks
®
The default retry period is 30 minutes. To change the retry period, enter this
command:
-> system backup retry <minutes>
Addresses to Ping
Dial Backup can also actively determine whether the DSL link is up by pinging IP
addresses. It does so only if you provide it with one or more IP addresses.
You could choose to ping addresses that are vital to your application. The router pings
these addresses at the interval you specify (default, every 5 seconds). It compares a
specified number of samples (default, 6) against the specified minimum success rate
(default, 50%). If the success rate is less than the minimum, the DSL link is assumed
to be down.
If you specify one or more addresses, the router pings those addresses to determine
if the DSL link is up. You may request that the router ping any or all of these:
• One or more specific IP addresses (four decimals separated by periods)
• Your gateway address (GW)
• Your domain name server address (DNS).
The router determines your gateway and/or DNS address implicitly via a means such
as DHCP, static configuration, PPP negotiation, etc.
If you specify more than one address to ping, you may want to assign the addresses
to groups. Each group can be assigned its own ping interval, number of samples, and
success rate. For example, you might want the success rate for the DNS address to
be at least 95%, while a success rate of 50% would be reasonable for a heavily used
website. You can also disable and re-enable ping addresses by group. A group is
identified by its number (0 through 65535).
To add an address to the ping list, use this command:
-> system backup add <ipaddr> | gw | dns | [<group>]
After you enter a ping address, you can see the ping list using the command system
list. For example, the addresses in this ping list are the gateway (GW) address and
the domain name server (DNS) address:
To remove an address from the ping list, use this command:
-> system backup delete <ipaddr> | gw | dns | [<group>]
To remove a group of addresses, enter:
-> system backup delete all [<group>]
IP Address(es)........GW
DNS