Displaying Multi-trunk Stacking Configuration

The multi-stack-trunk command is used on live stacks and is effectively a combination of two stack-trunk commands to ensure that a trunk-to-trunk connection is created on both ends of a stack link simultaneously. When the multi-stack trunk command is used to create a trunk, the configuration is saved as stack trunk ports, and the running configuration displays the stack trunk details on both ends under the heading stack unit <unit> configuration.

ICX7250-48P Router# configure terminal 
ICX7250-48P Router(config)# stack unit 1
ICX7250-48P Router(config-unit-1)# multi-stack-trunk 1/2/1 to 1/2/4 and 2/2/1 to 2/2/4
!
ICX7250-48P Router(config-unit-1)# exit

In the previous example, a two-port trunk is created between stack units 1 and 2. This example enlarges the two-port trunk to a three-port trunk.

Use the show running-config command to display the related configuration under stack-trunk and stack-port. For the multi-stack trunk created in the previous example, the running or startup configuration displays the following configuration for the show running-config command.

ICX7250-48P Router(config)# show running-config
Current configuration:
!
ver 08.0.90
!
stack unit 1
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  priority 128
  stack-trunk 1/2/1 to 1/2/4
  
stack unit 2
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 2/2/1 to 2/2/4
  
stack enable
stack mac 609c.9f99.3f80
!
!
ICX7250-48P Router(config)# write memory