GRE Backup Tunnel

Instant supports configuring a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel over IPv6 between an Instant AP and a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. terminating device such as a wireless access gatewayGateway is a network node that allows traffic to flow in and out of the network. or a controller. Starting from Aruba Instant 8.4.0.0, every Instant AP in a cluster is able to establish a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel over IPv6. Each Instant AP can support a primary tunnel and a backup tunnel configuration. However, only one of these tunnels can be active at any given time under manual GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. configuration. This feature also introduces GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel failover, wherein if the primary GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel is not reachable, the Instant APs will automatically failover to the backup GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel. The Instant AP uses icmp pings to detect reachability of the primary and backup tunnel endpoints. At any point of time, only one GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel can stay active.

 

If a controller is used as the GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel endpoint, you must manually configure the GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel in the controller while using manual GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. in the Instant AP.

Configuring GRE Backup Tunnel Parameters

You can configure a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel over IPv6 between an Instant AP and a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. endpoint. Execute the following commands in the Instant CLICommand-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions.:

To configure a primary GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel endpoint:

(Instant AP)(config)# gre primary <name>

To configure a backup GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel endpoint:

(Instant AP)(config)# gre backup <name>

To remove backup or primary GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel configuration

(Instant AP)(config)# no gre backup | no gre primary

To remove the entire GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. configuration:

(Instant AP)(config)# no gre backup

(Instant AP)(config)# no gre primary

To prevent the SSIDService Set Identifier. SSID is a name given to a WLAN and is used by the client to access a WLAN network. from being disabled during a GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel failover or recovery:

(Instant AP)(config)# gre disable-reconnect-user-on-failover

To configure the timer after which the SSIDsService Set Identifier. SSID is a name given to a WLAN and is used by the client to access a WLAN network. should come up once the tunnel status is UP:

(Instant AP)(config)# gre reconnect-time-on-failover <Time in secs>

To configure the number of ping packets to be missed to mark the tunnel status as DOWN:

(Instant AP)(config)# gre ping-retry-count <new_count>

To configure the time interval at which a ping probe packet needs to be sent:

(Instant AP)(config)# gre ping-frequency <time_in_secs>

To disable the hold on timer from running on the Instant AP:

(Instant AP)(config)# gre disable-preemption

To configure the hold down time interval before tunnel recovery from backup to primary:

(Instant AP)(config)# gre hold-time <time_in_secs>

Verifying the Configuration

Use the following commands to verify the GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel configuration on an Instant AP.

To view the various parameters configured for the GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel on the Instant AP:

(Instant AP)# show gre config

To display the various parameters that indicate the status of the GREGeneric Routing Encapsulation. GRE is an IP encapsulation protocol that is used to transport packets over a network. tunnel:

(Instant AP)# show gre status