Avaya G430 Manual page 438

The router
Gxxx-001(super router:rip)# exit
Gxxx-001(super)#
Static route: Configure a static rule on router 1 telling it the route for packets destined to the
tunnel's receiving endpoint (192.68.1.2). This route should be configured with a high route
preference. For example:
Gxxx-001(super)# ip route 192.68.1.2 255.255.0.0 192.68.1.3 high permanent
Done!
Gxxx-001(super)#
Optional GRE tunnel features
You can configure optional features in GRE tunnels. The tunnel keepalive feature enables
periodic checking to determine if the tunnel is up or down. The dynamic MTU discovery feature
determines and updates the lowest MTU on the current route through the tunnel.
Related topics:
Keepalive feature
Enabling the keepalive feature
Keepalive command parameters
Dynamic MTU discovery
Enabling and deactivating dynamic MTU discovery
tunnel path-mtu-discovery parameters
Keepalive feature
The tunnel keepalive feature sends keepalive packets through the Tunnel interface to
determine whether the tunnel is up or down. This feature enables the tunnel's source interface
to inform the host if the tunnel is down. When the tunnel keepalive feature is not active, if the
tunnel is down, the tunnel's local endpoint continues to attempt to send packets over the tunnel
without informing the host that the packets are failing to reach their destination.
Enabling the keepalive feature
Procedure
Use the keepalive command in the GRE Tunnel interface context to enable the
tunnel keepalive feature.
You do not have to configure tunnel keepalive on both sides of the tunnel.
Use the no form of this command to deactivate the feature.
Example
The following example configures Tunnel 1 to send keepalive packets every 20 seconds. If the
tunnel's destination interface fails to respond to three consecutive packets, the tunnel's source
438 Administering Avaya G430 Branch Gateway
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Note:
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October 2013