Backup activation
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It is also possible to use the alternative:
set backup checking-all-in-ipaddr-
list ip1,ip2, …ipN via icmp through
-interface <ifname>
and activate backup if at least one of the addresses in the list does not reply to ping commands.
It is also possible to use:
set backup checking-all-in-IPaddr-
list IP1,IP2, …IPN via icmp through
-interface <ifname>
and activate the backup if at least one of the addresses on the list does not respond to ping
commands.
2. Periodic transmission of a BFD-Light (bfdping) packet through a specified network interface and
addressed to a local Imola address. The required command is:
set backup checking-ipaddress <locipadr> via bfd through-interface <ifname>
The primary connection is unavailable if the packet is not received after N attempts of transmission.
The number of attempts, the latency for a reply, the interval between a group attempts and the
following one, are configured by using the commands:
set backup check-retries N
set backup check-wait T1
set backup check-interval T2
The sequence of bfd packets is still transmitted to the specified interface and the primary
connection is available as soon as a reply is received.
By using the command:
set backup check-tos N
it is possible to specify the value of the Type of service (TOS) field of transmitted packets.
3. Periodic transmission of a UDP packet towards a specified IP address and port through a
specified network interval. The command is:
set backup checking-ipaddress a.b.c.d via udp through-interface <ifname>
The primary connection is unavailable if no reply is received from the specified host after N
attempts of transmission. The UDP port to which packets will be sent, can be configured through
the command:
set backup check-port N
The number of attempts, latency for the reply, the interval between a group of attempts and the
following one, can be configured by using the commands:
set backup check-retries N
set backup check-wait T1
set backup check-interval T2
The sequence of udp packets is still transmitted to the specified interface and the primary
connection is available as soon as a reply is received.
4. Periodic connection to a TCP service towards a specified IP address and a port through a
specified network interface. The command is:
set backup checking-ipaddress a.b.c.d via tcp through-interface <ifname>
the primary connection is declared unavailable if it is not possible to execute a TCP connection with
the service of the specified host.