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fast-failover

Configures fast-failover support on the L2TPv3 tunnel. When configured, devices, using this profile, send tunnel requests to both peers, and in turn, establish tunnels with both peers. If not configured, tunnel establishment occurs on one peer, with failover and other functionality the same as legacy behavior. In case fast failover is configured when an active tunnel, with one peer, already exists, the tunnel establishment process is re-initiated with both peers. Of the two tunnels established, one is marked active while the other is standby. The sessions and routes from the active tunnel are only pushed to the dataplane, resulting in creation of data sessions. However, if the active tunnel fails, sessions and routes from the standby tunnel are pushed to the dataplane thereby providing almost immediate fail over. Both tunnels individually perform connection health checkups through hello intervals. This option is disabled by default.

Supported in the following platforms:

  • Access Points — AP7502, AP7522, AP7532, AP7562, AP7602, AP7612, AP7622, AP7632, AP7662, AP8163, AP8432, AP8533
  • Wireless Controller — RFS4010
  • Service Platforms — NX5500, NX7500, NX9500, NX9600, VX9000

Syntax

fast-failover {aggressive}

Parameters

fast-failover {aggressive}
fast-failover Configures fast-failover support on the L2TPv3 tunnel
aggressive Optional. When enabled, tunnel initiation hello requests are set to zero. For failure detections, hello attempts are not retried, regardless of the number of retry attempts configured. This option is disabled by default.
Note: The hello-interval and retry-attempts parameters are defined in the L2TPv3 Policy context. For more information on configuring an L2TPv3 policy, see l2tpv3-policy-commands. For more information on associating an L2TPv3 policy to an L2TPv3 tunnel, see use.

Examples

nx9500-6C8809(config-profile testNX9500-l2tpv3-tunnel-TestTunnel2)#show context
include-factory | include fast-failover
  no fast-failover
nx9500-6C8809(config-profile testNX9500-l2tpv3-tunnel-TestTunnel2)#
nx9500-6C8809(config-profile testNX9500-l2tpv3-tunnel-TestTunnel2)#fast-failover
 aggressive
nx9500-6C8809(config-profile testNX9500-l2tpv3-tunnel-TestTunnel2)#show context
 l2tpv3 tunnel TestTunnel2
  fast-failover aggressive
nx9500-6C8809(config-profile testNX9500-l2tpv3-tunnel-TestTunnel2)#

Related Commands

no (l2tpv3-tunnel-config-mode-command) Removes fast-failover support on the L2TPv3 tunnel
Published August 2019prev | next

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