C6832-X-LE + VSS

[chris_cox]

Hi,

I've just tried creating a VSS cluster with two C6832-X-LE switches and have experienced a problem after the initial reload once the command to convert to VSS has been issued on switch 2 :

*Apr 30 10:52:10.931: %VSL_BRINGUP-3-MODULE_DOWN: Failed to bring up VSL module in slot 1 switch 2. Not enough power

*Apr 30 10:52:12.947: %VSL_BRINGUP-3-NO_MODULE_UP: Failed to bring up any VSL modules on switch 2

*Apr 30 10:52:12.947: %VSLP-5-RRP_NO_PEER: No VSLP peer found. Resolving role as ActiveInitializing as Virtual Switch ACTIVE processor

*Apr 30 10:52:12.947: %VSLP-2-VSL_DOWN:   VSL links down and not ready for any traffic

The module contains both VSLs and does come up later in the boot process however it causes a reload due to detecting the presence of the Active switch :

*Apr 30 10:55:01.499: %DIAG-SW2-6-DIAG_OK: Switch 2 Module 1: Passed Online Diagnostics

*Apr 30 10:55:11.523: %OIR-SW2-6-SP_INSCARD: Card inserted in Switch_number = 2, physical slot 1, interfaces are now online

*Apr 30 10:55:30.915: %VSLP-SW2-5-VSLP_LMP_PASS_REASON: interface Te2/1/10:  Link up

*Apr 30 10:55:30.915: %VSLP-SW2-5-VSLP_LMP_PASS_REASON: interface Te2/1/2:  Link up

*Apr 30 10:55:31.355: %VSLP-SW2-5-RRP_MSG: Role change from Active to Standby and hence need to reload

*Apr 30 10:55:31.355: %VSLP-SW2-5-RRP_MSG: Reloading the system...

Both DC PSUs are operating correctly however I did notice the following (from the output of 'show env') :

switch 1 power-supply 1 power-input: DC unknown

Has anyone seen this before?

TIA for any help.

Regards,

Chris

[Reza Sharifi]

Hi,

How about the output of "show power"?

Does it show that the PSUs are unknow?

HTH

[chris_cox]

Hi,

Output from 'show power' :

system power redundancy mode = redundant
system power total =      744.00 Watts (62.00 Amps @ 12V)
system power used =       732.00 Watts (61.00 Amps @ 12V)
system power available =   12.00 Watts ( 1.00 Amps @ 12V)
                        Power-Capacity PS-Fan Output Oper
PS   Type               Watts   A @12V Status Status State
---- ------------------ ------- ------ ------ ------ -----
1    C6840-X-750W-DC     744.00 62.00  OK     OK     on
2    C6840-X-750W-DC     744.00 62.00  OK     OK     on
                        Pwr-Allocated  Oper
Fan  Type               Watts   A @12V State
---- ------------------ ------- ------ -----
1    C6840-X-FAN         108.00  9.00  OK

                        Pwr-Requested  Pwr-Allocated  Admin Oper
Slot Card-Type          Watts   A @12V Watts   A @12V State State
---- ------------------ ------- ------ ------- ------ ----- -----
1    C6832-X-LE          624.00 52.00   624.00 52.00  on    on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit =   1200.00 Watts (100.00 Amps @ 12V)
system auxiliary connector power limit = 0 Watt
system primary power used =               732.00 Watts (61.00 Amps @ 12V)
system auxiliary power used =            0 Watt

And 'show env' :

environmental alarms:
  no alarms

backplane:
  operating fan count: 1
 
fan-tray 1:
  fan-tray 1 type: C6840-X-FAN
  fan-tray 1 mode: Mode1
  fan-tray 1 fan-fail: OK
  fan-tray 1 12V Power Supply: OK
  fan-tray 1 firmware version: 226
power-supply 1:
  power-supply 1 fan-fail: OK
  power-supply 1 power-input: DC unknown
  power-supply 1 power-output-mode: high
  power-supply 1 power-output-fail: OK
  power-supply 1 power-output-under-voltage: OK
power-supply 2:
  power-supply 2 fan-fail: OK
  power-supply 2 power-input: DC unknown
  power-supply 2 power-output-mode: high
  power-supply 2 power-output-fail: OK
  power-supply 2 power-output-under-voltage: OK
module 1:
  module 1 power-output-fail: OK
  module 1 outlet-1 temperature: 40C
  module 1 inlet-1  temperature: 27C
  module 1 outlet-2 temperature: 49C
  module 1 inlet-2  temperature: 28C
  module 1 outlet-3 temperature: 41C
  module 1 inlet-3  temperature: 25C
  module 1 outlet-4 temperature: 56C
  module 1 inlet-4  temperature: 27C
  module 1 asic-1 temperature: 49C
  module 1 asic-2 temperature: 50C
  module 1 asic-3 temperature: 51C
  module 1 asic-4 temperature: 53C
  module 1 asic-5 temperature: 51C
  module 1 asic-6 temperature: 38C
  module 1 asic-7 temperature: 38C
  module 1 EARL 1 device-1 temperature: 75C
  module 1 EARL 1 device-2 temperature: 73C
  module 1 EARL 2 device-1 temperature: 83C
  module 1 EARL 2 device-2 temperature: 79C

chassis connector rating:  360.00 Watts (30.00 Amps @ 12V)
module 1
  module 1 connector rating: 1080.00 Watts (90.00 Amps @ 12V)
  module 1 power consumption:  624.00 Watts (52.00 Amps @ 12V)

chassis per slot cooling capacity: 144 cfm
ambient temperature: < 55C
  module 1 cooling requirement: 84 cfm

Regards,

Chris

[Reza Sharifi]

Seems that almost all the power is being consumed and you don't have enough power.

system power total =      744.00 Watts (62.00 Amps @ 12V)
system power used =       732.00 Watts (61.00 Amps @ 12V)
system power available =   12.00 Watts ( 1.00 Amps @ 12V)

HTH

[Leo Laohoo · Accepted solution]

Raise a TAC Case.
I think this is an IOS bug.

[chris_cox]

Thanks.

I've just spotted CSCvf25518 - "Catalyst 6800 - VSS can not be formed running 15.4 IOS train using "C6840-X-750W-DC" power supplies.".  Which may be related (even though I'm on 15.2(2)SY3).

I'll attempt an upgrade to one of the known fixed releases.

Regards,

Chris

[chris_cox]

Hi,

I've upgraded to 15.5.1-SY1 and everything is now working as expected.

Regards,

Chris

[Reza Sharifi]

Thanks for the feedback.