I'm using two kind of switches i.e Cat2960S-24TD-L and Cat2960S-48TS-L with RPS2300 for backup power.
One question was raising in my head during the power redundancy test on the switches.
My question is how NMS can recognize that AC power is put in back as normal status without any log.
Each switch has two power sources. One from AC built-in power and the other from RPS2300 as below.
Access_SW#show env all
FAN is OK
TEMPERATURE is OK
Temperature Value: 39 Degree Celsius
Temperature State: GREEN
Yellow Threshold : 50 Degree Celsius
Red Threshold : 60 Degree Celsius
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1 Built-in Good
2 Built-in Good
SW Status RPS Name RPS Serial# RPS Port#
-- ------------- ---------------- ----------- ---------
1 Active RPS1 FDO1447YGT3 3
2 Active RPS1 FDO1447YGT3 6
~snipped~
DCOut State Connected Priority BackingUp WillBackup Portname SW#
----- ------- --------- -------- --------- ---------- --------------- ---
1 Active No 6 No Yes <> -
2 Active No 6 No Yes <> -
3 Active Yes 6 No Yes Access_SW 1
4 Active No 6 No Yes <> -
5 Active No 6 No Yes <> -
6 Active Yes 6 No Yes Access_SW 2
When I pull out the AC power cable out from the switch, it shows the proper log saying as below.
Access_SW#
Jul 8 17:15:46 UTC: %PLATFORM_ENV-1-PWR: Internal power supply not supplying power (Access_SW-2)
Access_SW#show env all
FAN is OK
TEMPERATURE is OK
Temperature Value: 39 Degree Celsius
Temperature State: GREEN
Yellow Threshold : 50 Degree Celsius
Red Threshold : 60 Degree Celsius
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1 Built-in Good
2 Built-in Unavail
SW Status RPS Name RPS Serial# RPS Port#
-- ------------- ---------------- ----------- ---------
1 Active RPS1 FDO1447YGT3 3
2 Active RPS1 FDO1447YGT3 6
~snipped~
DCOut State Connected Priority BackingUp WillBackup Portname SW#
----- ------- --------- -------- --------- ---------- --------------- ---
1 Active No 6 No Yes <> -
2 Active No 6 No Yes <> -
3 Active Yes 6 No Yes Access_SW 1
4 Active No 6 No Yes <> -
5 Active No 6 No Yes <> -
6 Active Yes 6 Yes Yes Access_SW 2
But I put AC power cable back into the switch, it doesn't show any log and any change to me. It still shows 'Built-in is Unavail' as below.
Access_SW#show env all
~snipped~
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1 Built-in Good
2 Built-in Unavail
SW Status RPS Name RPS Serial# RPS Port#
-- ------------- ---------------- ----------- ---------
1 Active RPS1 FDO1447YGT3 3
2 Active RPS1 FDO1447YGT3 6
~snipped~
DCOut State Connected Priority BackingUp WillBackup Portname SW#
----- ------- --------- -------- --------- ---------- --------------- ---
1 Active No 6 No Yes <> -
2 Active No 6 No Yes <> -
3 Active Yes 6 No Yes Access_SW 1
4 Active No 6 No Yes <> -
5 Active No 6 No Yes <> -
6 Active Yes 6 Yes Yes Access_SW 2
The problem is how the operator can decide 'Now AC power is okay so I will push the button on RPS to make it backup again' without getting any information from the switch.
