Cisco Switch 9300 Error Stacks between two Switch

[khalilsoltani47714]

Hello,

I have two cisco switch  C9300-48UXM version image 17.06.04 mode install and the same license 

I connected two stack cables (Data) and I chose a switch with the higher priority I put it 15
afterwards I restarted the two switchs
unfortunately they are not stacked Despite the two switches and the stack cables are new, i used other stack cable but the same issue someone have idea 

Error message:

*Aug 5 13:13:30.094: %STACKMGR-6-STACK_LINK_CHANGE: Switch 1 R0/0: stack_mgr: Stack port 1 on Switch 1 is cable-not-connected
*Aug 5 13:13:30.094: %STACKMGR-6-STACK_LINK_CHANGE: Switch 1 R0/0: stack_mgr: Stack port 2 on Switch 1 is down
*Aug 5 13:13:30.094: %STACKMGR-6-STACK_LINK_CHANGE: Switch 1 R0/0: stack_mgr: Stack port 2 on Switch 1 is cable-not-connected
*Aug 5 13:13:30.626: %STACKMGR-4-SWITCH_ADDED: Switch 1 R0/0: stack_mgr: Switch 1 has been added to the stack.
*Aug 5 13:13:32.823: %STACKMGR-4-SWITCH_ADDED: Switch 1 R0/0: stack_mgr: Switch 1 has been added to the stack.
*Aug 5 13:13:34.907: %STACKMGR-4-SWITCH_ADDED: Switch 1 R0/0: stack_mgr: Switch 1 has been added to the stack.
*Aug 5 13:13:34.908: %STACKMGR-6-ACTIVE_ELECTED: Switch 1 R0/0: stack_mgr: Switch 1 has been elected ACTIVE.

Switch#show switch neighbors
Switch # Port 1 Port 2
-------- ------ ------
1 None NoneSwitch#show switch stack-ports
Switch# Port1 Port2
----------------------------
1 DOWN DOWN

[Reza Sharifi]

Hi,

Try following the configuration guide below:

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-3/configuration_guide/stck_mgr_ha/b_173_stck_mgr_ha_9300_cg/managing_switch_stacks.html#reference_htk_dbg_11b

HTH

[khalilsoltani47714]

Thank you for your responsiveness, I followed this document
this is the first time I encountered an error message like this

[Reza Sharifi]

Make sure to connect the switches using 2 stacking cables. This way, if one is bad, the other one can function. 

Also, make sure the cable is inserted all the way into the slot.

HTH