Avaya G430 Manual page 278

WAN interfaces
Figure 9: Branch Gateway with T1 and xDSL lines
For example, your branch office might have a G430 that connects to an external router that
connects to Headquarters over a T1 line and through an xDSL connection to the Internet. The
T1 line is used for voice traffic, while data packets are sent over the xDSL line. If the Fast
Ethernet line protocol is up but the xDSL connected to it is down, then ICMP keepalive, which
checks the next hop, correctly reports that the WAN path is down. Policy-based routing, which
relies on the interface status to determine how packets are routed, can use ICMP keepalive
to know the status of the interfaces on its next hop list.
Note:
ICMP keepalive is not used with a GRE Tunnel interface. The GRE tunnel has its own
keepalive mechanism. For details, see
Note:
For details on DHCP Client see
Related topics:
Command used for enabling the ICMP keepalive feature
Commands used to define the ICMP keepalive parameters
Example of configuring ICMP keepalive
Summary of ICMP keepalive configuration commands
Command used for enabling the ICMP keepalive feature
Use the keepalive-icmp command in the context of the interface to enable the ICMP
keepalive feature.
For more information about these commands, see
commands
Avaya Branch Gateway G430 CLI Reference
Commands used to define the ICMP keepalive parameters
Use the following commands to define the ICMP keepalive parameters.
• keepalive-icmp timeout
• keepalive-icmp success-retries
278 Administering Avaya G430 Branch Gateway
on page 279 or
Comments? infodev@avaya.com
GRE tunneling
DHCP client configuration
on page 279
Summary of ICMP keepalive configuration
on page 434.
on page 204.
on page 278
on page 278
on page 279
October 2013