standby-enable

This command controls whether to allow a standby configuration for the aggregate interface.

Syntax

standby-enable on

standby-enable off

Parameters

on
Supports a standby configuration.
off
Prevents a standby configuration. This setting is the default value.

Guidelines

The standby-enable command controls whether to allow a standby configuration.
  • To support a standby configuration, use the standby-enable on command.
  • To prevent a standby configuration, use the standby-enable off command.

The standby configuration defines the policies for the group that this interface is a member. A standby group is the collection of interfaces on different systems in the multicast domain that share the responsibility for one virtual IP address. When at least one member of a standby group can reach the multicast domain, the virtual IP group receives the traffic.

Attention: Virtual IP addresses in a standby configuration must be IPv4 addresses.
Standby group members share the responsibility for the virtual IP addresses. Each member in a standby group must have the following configuration:
  • Be assigned to the same group. To define the group, use the standby-group command.
  • Use the same virtual IP address. To set the virtual IP address, use the standby-virtual-ip command. To define auxiliary, or secondary, virtual IP addresses, use the standby-secondary-virtual-ip command.
  • Use the same security token. To change the security token, use the standby-authentication command.

Each standby group has one active member and one or more passive members. The interface with the highest priority seeks to be the active member. To set the priority for a member, use the standby-priority command. To determine whether another member with a higher priority becomes the active member when it becomes available, use the standby-preempt command.

Attention: Do not use preemption.

The active member broadcasts hello messages, and all members listen for these messages. To set the interval between the hello messages, use the standby-hello-timer command. To set the duration that a passive member waits to receive a hello message, use the standby-hold-timer command.

When configured, the interfaces in the standby group operate in standby mode or in self-balancing mode with standby support. To operate in self-balancing mode, you must enable self-balancing with the standby-self-balance command and specify the distribution algorithm with the standby-distribution-algorithm command. Self-balancing requires the AppOpt feature.

Examples

Enable standby on the interface to standby group 2 with a virtual IP address of 10.10.66.66.
...
# standby-enable on
# standby-group 2
# standby-virtual-ip 10.10.66.66
# exit
Disable standby after it was enabled.
...
# standby-enable off
# exit