fast uplink-span

Enables Fast Uplink Span, configuring a device deployed as a wiring closet switch to decrease the convergence time for the uplink ports to another device to just one second.
Syntax
fast uplink-span ethernet stackid/slot/port [ to stackid/slot/port | [ ethernet stackid/slot/port to stackid/slot/port | ethernet stackid/slot/port ] ...]
no fast uplink-span ethernet stackid/slot/port [ to stackid/slot/port | [ ethernet stackid/slot/port to stackid/slot/port | ethernet stackid/slot/port ] ...]
Command Default

Fast Uplink Span is not enabled.

Parameters
ethernet stackid/slot/port
Specifies the Ethernet port on which you want to enable Fast Uplink Span.
to stackid/slot/port
Specifies a range of ports on which you want to enable Fast Uplink Span.
Modes

Global configuration mode

VLAN configuration mode

Usage Guidelines

The new uplink port goes directly to forward mode (bypassing listening and learning modes). The wiring closet switch must be a Ruckus device, but the device at the other end of the link can be a Ruckus device or another vendor’s switch.

To configure Fast Uplink Span, specify a group of ports that have redundant uplinks on the wiring closet switch (Ruckus device). If the active link becomes unavailable, Fast Uplink Span transitions the forwarding to one of the other redundant uplink ports in just one second. All Fast Uplink Span-enabled ports are members of a single Fast Uplink Span group.

To avoid the potential for temporary bridging loops, it is recommended that you use Fast Uplink Span only for wiring closet switches (switches at the edge of the network cloud). In addition, enable Fast Uplink Span only on a group of ports intended for redundancy, so that at any given time only one of the ports is expected to be in the forwarding state.

The no form of the command removes Fast Uplink Span on the ports.

Examples

The following example configures a group of ports for Fast Uplink Span.

device(config)# fast uplink-span ethernet 1/4/1 to 1/4/4

The following example configures Fast Uplink Span for a VLAN.

device(config)# vlan 10
device(config-vlan-10)# untag ethernet 1/8/1 to 1/8/2
device(config-vlan-10)# fast uplink-span ethernet 1/8/1 to 1/8/2