switch stack port-speed 10

[Jacob Berger]

i have a stack of 2960S switches

i want to add a new 2960X switch

do i need to execute the "switch stack port-speed 10" command on the stack before connecting the 2960X?

thanks

[Reza Sharifi]

Yes, since you are mixing S and X models you need to add witch stack port-speed 10 command.

Mixed Stack Membership

A mixed stack can have up to 4 stack members, with either a Catalyst 2960-X or Catalyst 2960-S switch as the stack master.

By default, Catalyst 2960-X switches operate at a port speed of 20 Gbps while 2960-S switches have a maximum port speed of 10 Gbps. In a mixed stack of Catalyst 2960-X and Catalyst 2960-S switches, the stack must operate at the port speed of the Catalyst 2960-S switch. Otherwise, the switches will not stack.

link:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/stack_manager/configuration_guide/b_stck_152ex_2960-x_cg/b_stck_152ex_2960-x_cg_chapter_010.html

HTH

To set the port speed of the stack to 10 Gbps, use the switch stack port-speed 10 global configuration command on a Catalyst 2960-X stack member before you add a Catalyst 2960-S switch to the stack, and then reload the stack.

[Jacob Berger]

my stack is a 2960S stack to witch i am adding a 2960X

so where do i execute the command?

[Reza Sharifi · Accepted solution]

on the 2960x in the global config mode

see link:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-0_2_EX/stack_manager/command_reference/b_stck_152ex_2960-x_cr/b_stck_152ex_2960-x_cr_chapter_01.html#wp3514062886

HTH