Users Guide

Table Of Contents
119| Network Configuration Parameters Dell Networking W-Series ArubaOS 6.5.x| User Guide
Configuring Tunnel Keepalives
The controller determines the status of a GRE tunnel by sending periodic keepalive frames on the Layer-2 or
Layer-3 GRE tunnel. When you enable tunnel keepalives, the tunnel is considered down” when the keepalives
fail repeatedly.
If you configure a firewall policy rule to redirect traffic to the tunnel, traffic is not forwarded to the tunnel until
it is "up." When the tunnel comes up or goes down, an SNMP trap and logging message is generated. The
remote endpoint of the tunnel does not need to support the keepalive mechanism.
The controller sends keepalive frames at 60-second intervals by default and retries keepalives up to three times
before the tunnel is considered down. You can change the default values of the intervals:
l For the interval, specify a value between 1 and 86400 seconds.
l For the retries, specify a value between 0 and 1024.
l To interoperate with Cisco network devices, use the cisco option.
In the WebUI
To configure keepalives (Heartbeats) via the WebUI:
1. On the controller, navigate to the Configuration > Network > IP > GRE Tunnels page.
2. Locate the tunnel ID for which you are enabling keepalives, then click Edit. The Edit GRE Tunnel screen
appears.
Figure 27 ConfiguringHeartbeats (Keepalives)
3. To enable tunnel keepalives and display the Heartbeat Interval and Heartbeat Retries fields, click Enable
Heartbeats.
a. Specify a value for Heartbeat Interval.
The default value is 10 seconds.
b. Specify a value for Heartbeat Retries.
The default value is 3 retries.
4. Click Apply.
In the CLI
To configure the keepalive heartbeats, use the following commands:
(host)(config) #interface tunnel id
tunnel keepalive [<interval> <retries>] [cisco]
Configuring GRE Tunnel Groups
This section contains the following information:
l About GRE Tunnel Groups
l Enabling a Tunnel Group
l Points to Remember
l Configuring a Layer-2 or Layer-3 Tunnel Group Using the CLI
l Configuring a Layer-2 or Layer-3 Tunnel Group Using the WebUI