Traffic redirected by a firewall policy rule is not forwarded to a tunnel that is “down” (see "Tunnel Keepalives" on page 127 for more information on how GRE tunnel status is determined). If you have more than one GRE tunnel configured, you can create multiple firewall policy rules with each rule redirecting the same traffic to different tunnels. If the tunnel in the first traffic redirect rule is down, then the tunnel in the subsequent traffic redirect rule is used instead.

In the WebUI

1.Navigate to the Configuration > Security > Access Control > Policies page.

2.Click Add to create a new firewall policy, or click Edit to edit a specific policy.

3.Click Add to create a new policy rule.

4.Configure the Source, Destination, and Service for the rule.

5.For Action, select redirect to tunnel. Enter the tunnel ID.

6.Configure any additional options, and click Add.

7.Click Apply.

In the CLI

(host) (config) #ip access-list session <name> <source> <destination> <service> redirect tunnel <id>

Tunnel Keepalives

The controller can determine the status of a GRE tunnel by sending periodic keepalive frames on the L2 or L3 GRE tunnel. If you enable tunnel keepalives, the tunnel is considered to be “down” if there is repeated failure of the keepalives. If you configured 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.

By default, the controller sends keepalive frames at 60-second intervals and retries keepalives up to three times before the tunnel is considered to be down. You can reconfigure the intervals from the default. For the interval, specify a value between 1-86400 seconds. For the retries, specify a value between 0-1024.

In the WebUI

1.Navigate to the Configuration > Network > IP > GRE Tunnels page.

2.Click Edit for the tunnel for which you are enabling tunnel keepalives.

3.Select (check) Enable Heartbeats to enable tunnel keepalives and display the Heartbeat Interval and Heartbeat Retries fields.

4.Enter values for Heartbeat Interval and Heartbeat Retries.

5.Click Apply.

In the CLI

(host) (config) #interface tunnel id tunnel keepalive [<interval> <retries>]

127 Network Configuration Parameters

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

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Image 127
Dell 6.2 manual Tunnel Keepalives, WebUI, Cli

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