Stack power port shutdown

[Alberto Falconi]

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

[julijime]

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

[Garry Cross]

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.

[jdworak14]

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!

[jmcshane]

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.