cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
10570
Views
40
Helpful
4
Replies

Stack power port shutdown

Alberto Falconi
Level 1
Level 1

Hello,

 

Power stack on my switch show ports in status Shut, there is a way to do a no shut in a way to enable those ports ?

 

Power stack name: Powerstack-1
    Stack mode: Redundant
    Stack topology: Standalone
    Switch 1:
        Power budget: 192
        Power allocated: 192
        Low port priority value: 22
        High port priority value: 13
        Switch priority value: 4
        Port 1 status: Shut
        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000
        Neighbor on port 2: 0000.0000.0000

 

4 Replies 4

julijime
Cisco Employee
Cisco Employee

Hi Alberto,

If this is a 3850 you can try with the following commands:

3850#stack-power switch 1 port 1 enable
3850#stack-power switch 1 port 2 enable

 

HTH,

Julio

Had this issue on a 9300 stack. All the switches were standalone after customer connected 6 switches into a power stack. Seems the switches disabled 2 of the ports in the stack to create 2 separate rings. But in the end all the switches were standalone mode. In this mode for some reason the was no available POE power even with 2 715W power supplies. Status of stack-power was SP-PS, whatever that means. I gather the PS part means Power Sharing.
I had to issue the command "no standalone" in each switches power-stack config mode, fix the stack ring to use 3 switches each and issue "stack-power switch x port y enable" on the two shut ports.

On any cisco catalyst stack you can only POWER STACK up to 4 in a RING.  You can DATA stack up to 8, but need to split the power stack to max of 4 switches.

You can XPS STAR Stack 8 switches with power but in a RING format you can only POWER Stack up to 4.  

 

If you put 5 switches into a RING power stack (i.e. sw1 to sw2, sw2 to sw3, sw3 to sw4, sw4 to sw5, and sw5 back to sw1) then the POWER STACK port on 4 will go to SHUT to 'protect' the power ring. 

Secondly the power ring will attempt to create "PowerStack-#" groups.  Do a SHOW STACK-POWER NEIGHBOR on your switch to see which switches are in each "PowerStack-#".

 

For example in a bad setup (i.e using 6 switches in a Power RING config which is against cisco docs):

TestStack1_NEW#sh stack-power nei
Power Stack Stack Stack Total Rsvd Alloc Unused Num Num
Name Mode Topolgy Pwr(W) Pwr(W) Pwr(W) Pwr(W) SW PS
-------------------- ------ ------- ------ ------ ------ ------ --- ---
Powerstack-1 SP-PS Ring 0 0 0 0 0 0
Powerstack-12 SP-PS Ring 4400 2352 828 1220 2 4
Powerstack-13 SP-PS Ring 0 0 0 0 0 0
Powerstack-14 SP-PS Ring 0 0 *0 *0 1 0
Powerstack-11 SP-PS Ring 8800 5694 992 2114 4 8

Power Stack Port 1 Port 1 Port 2 Port 2
SW Name Status Neighbor SW:MAC Status Neighbor SW:MAC
-- -------------------- ------ ---------------- ------ ----------------
1 Powerstack-11 Conn 2:c064.e4b2.6280 NoConn -
2 Powerstack-11 Conn 3:c064.e431.1000 Conn 1:c064.e471.1b00
3 Powerstack-1 Conn 4:c064.e44e.fb00 Conn 2:c064.e4b2.6280
4 Powerstack-14 Shut - Conn 3:c064.e431.1000
5 Powerstack-12 Conn 6:d4ad.bdf8.9900 Conn 4:c064.e44e.fb00
6 Powerstack-13 NoConn - Conn 5:c064.e44f.8b80

 

 

Note switch 4 did a SHUT on power port 1.

Note that the system tried to create Powerstack-1, -11, -12, -13, and -14 and put switches 1 and 2 in PStack-11 and switch 3 into PS-1, sw4 in PStack-14, sw5 in PStack-12, and SW6 in PStack-13.

 

Move the POWER STACK CABLING to groups of 3 power rings: sw1 to sw2, sw2 to sw3, sw3 to sw1 to makeup a single power group.  do the same for 4,5,6.

Then run your command again:

TestStack1_NEW#stack-power swit 4 port 1 en

TestStack1_NEW#sh stack-power nei
Power Stack Stack Stack Total Rsvd Alloc Unused Num Num
Name Mode Topolgy Pwr(W) Pwr(W) Pwr(W) Pwr(W) SW PS
-------------------- ------ ------- ------ ------ ------ ------ --- ---
Powerstack-11 SP-PS Ring 6600 124 1076 5400 3 6
Powerstack-1 SP-PS Ring 6600 456 744 5400 3 6

Power Stack Port 1 Port 1 Port 2 Port 2
SW Name Status Neighbor SW:MAC Status Neighbor SW:MAC
-- -------------------- ------ ---------------- ------ ----------------
1 Powerstack-1 Conn 2:c064.e4b2.6280 Conn 3:c064.e431.1000
2 Powerstack-1 Conn 3:c064.e431.1000 Conn 1:c064.e471.1b00
3 Powerstack-11 Conn 1:c064.e471.1b00 Conn 2:c064.e4b2.6280
4 Powerstack-11 Conn 5:c064.e44f.8b80 Conn 6:d4ad.bdf8.9900
5 Powerstack-11 Conn 6:d4ad.bdf8.9900 Conn 4:c064.e44e.fb00
6 Powerstack-11 Conn 4:c064.e44e.fb00 Conn 5:c064.e44f.8b80

 

 

Two Powerstack groups (#1 and #11) and gruops of properly distributed power for switch 1-3 and 4-6.

Enjoy!

 

I've never had an issue power stacking until today. I love when I see a very helpful command which I wasn't aware of, that works as it should. Thanks Juliijime.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: