Configuring LST

Note

DEMO FEATURE - Link-state tracking (LST) is a demonstration feature on some products. Demonstration features are provided for testing purposes. Demonstration features are for lab use only and are not for use in a production environment. For more information on feature support, see VOSS Feature Support Matrix.

Use this procedure to configure LST groups.

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]] [,...]}

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 a 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
----------------------------------------------------------------------