Hey all,
This topic posted to the DB about 3 or 4 times so I deleted the duplicated posts. Here is my question:
I'm curious as to if a power surge can cause our core switches to loop our network? On Saturday evening at 6pm EST, we had a network outage that resembled an STP loop. We had to shut down all of our edge switches to bring our network back up but we were told later that a power surge had occurred on the same floor that our 6500s reside. Both switches plug into outlets the run back to the facility's backup power units. I've provided the output of the 'show power' command from both switches. None of my logs showed that a power supply lost power but my thought is that if it did for a split second that some line cards may have been shut down and then brought back online. Can someone provide some feedback and I'll be happy to answer any questions you may have.
Core 1:
sh power
system power redundancy mode = redundant
system power total = 2771.16 Watts (65.98 Amps @ 42V)
system power used = 1866.48 Watts (44.44 Amps @ 42V)
system power available = 904.68 Watts (21.54 Amps @ 42V)
Power-Capacity PS-Fan Output Oper
PS Type Watts A @42V Status Status State
---- ------------------ ------- ------ ------ ------ -----
1 WS-CAC-3000W 2771.16 65.98 OK OK on
2 WS-CAC-3000W 2771.16 65.98 OK OK on
Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type Watts A @42V Watts A @42V State State
---- ------------------ ------- ------ ------- ------ ----- -----
1 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
2 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
3 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
4 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
5 WS-X6748-SFP 282.24 6.72 282.24 6.72 on on
6 WS-SUP720-3B 282.24 6.72 282.24 6.72 on on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit = 3780.00 Watts (90.00 Amps @ 42V)
system auxiliary connector power limit = 0 Watt
system primary power used = 1866.48 Watts (44.44 Amps @ 42V)
system auxiliary power used = 0 Watt
Core 2:
sh power
system power redundancy mode = redundant
system power total = 2771.16 Watts (65.98 Amps @ 42V)
system power used = 1866.48 Watts (44.44 Amps @ 42V)
system power available = 904.68 Watts (21.54 Amps @ 42V)
Power-Capacity PS-Fan Output Oper
PS Type Watts A @42V Status Status State
---- ------------------ ------- ------ ------ ------ -----
1 WS-CAC-3000W 2771.16 65.98 OK OK on
2 WS-CAC-3000W 2771.16 65.98 OK OK on
Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type Watts A @42V Watts A @42V State State
---- ------------------ ------- ------ ------- ------ ----- -----
1 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
2 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
3 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
4 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on
5 WS-X6748-SFP 282.24 6.72 282.24 6.72 on on
6 WS-SUP720-3B 282.24 6.72 282.24 6.72 on on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit = 3780.00 Watts (90.00 Amps @ 42V)
system auxiliary connector power limit = 0 Watt
system primary power used = 1866.48 Watts (44.44 Amps @ 42V)
system auxiliary power used = 0 Watt
Thanks,
T Lock
