Power Supply autoLC priority question

[Jagan1976]

Hi guys,

Can someone explain what this commands below means on my 9407?

Currently the auto shutdown is disabled, however if I turn it on does it mean in case there is insufficient power available, slot 1 will be shutdown first, then 2?

The document don't give much explanation on this.

#sh run | i auto

no power supply autoLC shutdown
power supply autoLC priority 1 2 5 6 7

#sh power module

Mod Model No   Priority State Budget Instantaneous Peak Reset Reset
--- -------------------- -------- -------- ------ ------------- ---- ------ -----
1 C9400-LC-48P  0 accepted 65 38 45 65 5
2 C9400-LC-48P  1 accepted 65 35 44 65 5
3 C9400-SUP-1   0 accepted 400 241 255 400 130
4 C9400-SUP-1   0 accepted 400 241 255 400 130
5 C9400-LC-48UX 2 accepted 240 156 158 240 15
6 C9400-LC-48P  3 accepted 65 32 44 65 5
7 C9400-LC-48P  4 accepted 65 35 43 65 5
-- Fan Tray     0 accepted 540 -- -- 540 --
--- -------------------- -------- -------- ------ ------------- ---- ------ -----
Total 1840

[luis_cordova]

Hi @Jagan1976 ,

This is what I understand by this paragraph:

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9400/software/release/16-6/configuration_guide/sys_mgmt/b_166_sys_mgmt_9400_cg/b_166_sys_mgmt_9400_cg_chapter_01101.html

Auto LC is disabled by default. Auto line card shutdown feature allows you to configure line card power priority. It enables hardware to automatically shutdown least priority line cards in power constraint mode until the total available power becomes greater than or equal to the total used power displayed in the power summary of show power command. This feature provides deterministic behavior of the switch in case of power supply failure events and prioritized line card shutdown events.

Automatic module shutdown is disabled by default, so you have to turn it on to be able to use this function.

It is something similar to the interfaces of a router, which come shutdown by default and it is necessary to enter the no shutdown command to take them to UP.

Once the function is enabled, you can choose the order in which the modules will be turned off.
The first module chosen will be assigned priority 0, the second priority 1, and so on.

Regards