Configure LST

Procedure

  1. Enter Global Configuration mode:

    enable

    configure terminal

  2. Configure the LST group upstream and downstream interface members:

    link-state group <1–48> <upstream | downstream> interface gigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}

  3. Configure the LST group upstream and downstream mlt members:

    link-state group <1–48> <upstream | downstream> mlt <1-512>

  4. Enable the group:

    link-state group <1–48> enable

  5. Display the status of the groups:

    show link-state group <1–48> [detail]

Example

The following example shows an LST group created with ports 1–4 and mlt 1 as upstream members and ports 11–14 and mlt 2 as downstream members. The LST group is enabled. Because port 1 is up, the LST group receives an up operational state and the downstream interfaces are enabled. Upstream ports 2, 4 and mlt 1 have VLACP admin enabled and are listed in the VLACP Upstream State section.

Switch:1> enable
Switch:1# configure terminal
Switch:1(config)# link-state group 1 upstream interface gigabitEthernet 1/1-1/4
Switch:1(config)# link-state group 1 upstream mlt 1
Switch:1(config)# link-state group 1 downstream interface gigabitEthernet 1/11-1/14
Switch:1(config)# link-state group 1 downstream mlt 2
Switch:1(config)# link-state group 1 enable
Switch:1(config)# show link-state group 1
======================================================================
               Link State Tracking General Info
======================================================================
Group                   1
Status                  Enabled
Operational Status      UP 
----------------------------------------------------------------------

Switch:1(config)# show link-state detail
======================================================================
               Link State Tracking Detailed Info
======================================================================
Group:                1
Status:               Enabled
Operational Status:   UP
VLACP Upstream State: Active on ports: 1/2, 1/4
                      Active on Trunks: 1
Upstream Ports:
1/1  (UP)  1/2  (DW)  1/3  (DW)  1/4 (DW)
Upstream Trunks:
1    (UP)
Downstream Ports:
1/11 (UP)  1/12 (DW)  1/13 (DW) 1/14 (UP)
Downstream Trunks:
2    (DW)
----------------------------------------------------------------------
Group                      : 2
Status                     : Disabled
Operational Status         : N/A
VLACP Upstream State:      : N/A
Upstream Ports:            : Not Configured
Upstream Trunks:           : Not Configured
Downstream Ports:          : Not Configured
Downstream Trunks:         : Not Configured
----------------------------------------------------------------------

Variable definitions

Use the data in the following table to use the link-state command.

Variable

Value

enable

Activates the action specified for the LST group or specified interfaces.

group <1–48>

Specifies a LST group ID.

interface gigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}

Adds ports to the specified upstream or downstream LST group.

Identifies the slot and port in one of the following formats:

  • a single slot and port (slot/port)

  • a range of slots and ports (slot/port-slot/port)

  • a series of slots and ports (slot/port,slot/port,slot/port)

  • all ports on the same slot (slot/all)

  • all ports on the switch (all)

If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.

mlt <1–512>

Adds an MLT to the specified upstream or downstream LSTgroup.

<upstream | downstream>

Specifies the upstream or downstream interfaces in the LST group.

Use the data in the following table to use the show link-state command.

Variable

Value

detail

Displays the specified LST group status as enabled or disabled and if the operational status is up or down. Detail displays LST group additional information.
9039040-00 Rev AB