Solved: Re: 3850 stack power 5 switches not forming ring

hmc250000 · ‎01-13-2020

We have a 5 switch 3850 stack and I'm trying to get the stack power to work but no luck so far. I'm following this document.

https://208.74.205.244/t5/networking-documents/how-to-form-a-catalyst-3850-data-stack-and-power-stack/ta-p/3156083/page/2

Does it matter which end of the cable (yellow and green) is plugged in where? I have it plugged in so that the yellow mark on the cable is at the top end and the green mark at the bottom of the cables.

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 56 WS-C3850-48T 03.07.04E cat3k_caa-universalk9 INSTALL
2 56 WS-C3850-48T 03.07.04E cat3k_caa-universalk9 INSTALL
3 56 WS-C3850-48T 03.07.04E cat3k_caa-universalk9 INSTALL
4 34 WS-C3850-24XS 03.07.04E cat3k_caa-universalk9 INSTALL
5 34 WS-C3850-24XS 03.07.04E cat3k_caa-universalk9 INSTALL

#sh stack-power
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 Stndaln 0 0 0 0 0 0
Powerstack-12 SP-PS Stndaln 715 305 410 0 1 1
Powerstack-13 SP-PS Ring 1050 210 840 0 3 3

#

#sh stack-power det
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 Stndaln 0 0 0 0 0 0
Powerstack-12 SP-PS Stndaln 715 305 410 0 1 1
Powerstack-13 SP-PS Ring 1050 210 840 0 3 3

Power stack name: Powerstack-1
Stack mode: Power sharing
Stack topology: Standalone
Switch 4:
Power budget: 410
Power allocated: 410
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

Power stack name: Powerstack-12
Stack mode: Power sharing
Stack topology: Standalone
Switch 5:
Power budget: 410
Power allocated: 410
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Not connected
Port 2 status: Not connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: 0000.0000.0000

Power stack name: Powerstack-13
Stack mode: Power sharing
Stack topology: Ring
Switch 2:
Power budget: 280
Power allocated: 280
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: Switch 3 - 00a2.8986.5700
Neighbor on port 2: Switch 1 - 00a2.8986.8780

Switch 3:
Power budget: 280
Power allocated: 280
Low port priority value: 20
High port priority value: 11
Switch priority value: 2
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: Switch 1 - 00a2.8986.8780
Neighbor on port 2: Switch 2 - 00a2.898d.a500

Switch 1:
Power budget: 280
Power allocated: 280
Low port priority value: 21
High port priority value: 12
Switch priority value: 3
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: Switch 2 - 00a2.898d.a500
Neighbor on port 2: Switch 3 - 00a2.8986.5700

#

Mark Malone · ‎01-14-2020

example
#stack-power switch 1 port 1 ?
disable Disable power stack port
enable Enable power stack port

and yes i would do 2 rings if your using stack-power as redundancy

View solution in original post

pieterh · ‎01-14-2020

Hi there I notice this in your output:

Switch 1, 2, 3
Power budget: 280 each

and

Switch 4, 5
Power budget: 410 each

do switch 4 and 5 have redundant power supplies themselves? (show inventory)

hmc250000 · ‎01-14-2020

All 5 switches have 1 power supply. Switch 4 and 5 have a 715 W power supply.

#sh in
*Jan 14 07:50:30.017: %SYS-5-CONFIG_I: Configured from console by administrator on consoleventory
NAME: "c38xx Stack", DESCR: "c38xx Stack"
PID: WS-C3850-48T , VID: V07 , SN: FCW2027F0ZT

NAME: "Switch 1", DESCR: "WS-C3850-48T-S"
PID: WS-C3850-48T-S , VID: V07 , SN: FCW2027F0ZT

NAME: "StackPort1/1", DESCR: "StackPort1/1"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4AM

NAME: "StackPort1/2", DESCR: "StackPort1/2"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4AE

NAME: "Switch 1 - Power Supply A", DESCR: "Switch 1 - Power Supply A"
PID: PWR-C1-350WAC , VID: V01 , SN: ART2026F0HU

NAME: "Switch 1 FRU Uplink Module 1", DESCR: "4x1G Uplink Module"
PID: C3850-NM-4-1G , VID: V01 , SN: FOC20214N6R

NAME: "Gi1/1/3", DESCR: "1000BaseLX SFP"
PID: GLC-LH-SMD , VID: V01 , SN: FNS1847164X

NAME: "Switch 2", DESCR: "WS-C3850-48T-S"
PID: WS-C3850-48T-S , VID: V07 , SN: FCW2027D10F

NAME: "StackPort2/1", DESCR: "StackPort2/1"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4E4

NAME: "StackPort2/2", DESCR: "StackPort2/2"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4AM

NAME: "Switch 2 - Power Supply A", DESCR: "Switch 2 - Power Supply A"
PID: PWR-C1-350WAC , VID: V01 , SN: ART2026F0HY

NAME: "Switch 2 FRU Uplink Module 1", DESCR: "4x1G Uplink Module"
PID: C3850-NM-4-1G , VID: V01 , SN: FOC20214NQ2

NAME: "Switch 3", DESCR: "WS-C3850-48T-S"
PID: WS-C3850-48T-S , VID: V07 , SN: FOC2027U1Q2

NAME: "StackPort3/1", DESCR: "StackPort3/1"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4EM

NAME: "StackPort3/2", DESCR: "StackPort3/2"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4E4

NAME: "Switch 3 - Power Supply A", DESCR: "Switch 3 - Power Supply A"
PID: PWR-C1-350WAC , VID: V01 , SN: ART2026F0HX

NAME: "Switch 3 FRU Uplink Module 1", DESCR: "2x1G 2x10G Uplink Module"
PID: C3850-NM-2-10G , VID: V01 , SN: FOC19261BLQ

NAME: "Te3/1/4", DESCR: "1000BaseLX SFP"
PID: , VID: , SN: AGS1008A0KE

NAME: "Switch 4", DESCR: "WS-C3850-24XS-S"
PID: WS-C3850-24XS-S , VID: V02 , SN: FCW2221C01N

NAME: "StackPort4/1", DESCR: "StackPort4/1"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2120GAQ2

NAME: "StackPort4/2", DESCR: "StackPort4/2"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4EM

NAME: "Switch 4 - Power Supply A", DESCR: "Switch 4 - Power Supply A"
PID: PWR-C1-715WAC , VID: V02 , SN: DCA2215G2GJ

NAME: "Switch 5", DESCR: "WS-C3850-24XS-S"
PID: WS-C3850-24XS-S , VID: V02 , SN: FOC2237L120

NAME: "StackPort5/1", DESCR: "StackPort5/1"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2022G4AE

NAME: "StackPort5/2", DESCR: "StackPort5/2"
PID: STACK-T1-50CM , VID: V01 , SN: LCC2120GAQ2

NAME: "Switch 5 - Power Supply A", DESCR: "Switch 5 - Power Supply A"
PID: PWR-C1-715WAC , VID: V02 , SN: DCA2230G12C

#

Deepak Kumar · ‎01-14-2020

Hi,

As per your picture, the ring is not closed. Please close the ring as recommended.

Regards,
Deepak Kumar,
Don't forget to vote and accept the solution if this comment will help you!

hmc250000 · ‎01-14-2020

Well should there not be 2 rings actually? Because only up to 4 switches are supported in a power stack? THe way this is wired I think there should be one ring of 3 switches and another ring of 2. Correct me if I'm wrong.

And I noticed and think the problem here might be that the power stack ports on switch 4 are shut. Any idea how to unshut?

Switch 4:
Power budget: 410
Power allocated: 410
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

Mark Malone · ‎01-14-2020

example
#stack-power switch 1 port 1 ?
disable Disable power stack port
enable Enable power stack port

and yes i would do 2 rings if your using stack-power as redundancy

hmc250000 · ‎01-14-2020

Found it.

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

Now showing rings:

#sh stack-power
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 715 305 410 0 1 1
Powerstack-13 SP-PS Ring 1050 210 840 0 3 3

#

This is now working correct right?

Mark Malone · ‎01-14-2020

yes looks ok but always confirm with and show switch detail

show switch stack-ports
Switch# Port1 Port2
----------------------------
1 OK OK
2 OK OK
3 OK OK