04-15-2008 10:41 AM - edited 03-05-2019 10:24 PM
The network was working good with 2 3560G switches working as core
switch.We had a power failure and since then the network is only
stable if 1 core switch is running. if we turn on the 2nd everything
goes down after 5 minutes. it might come back after some 5 minutes
and goes down again. If i switch of the 2nd core switch all goes
back to normal. configuration seems normal. we have not changed
anything. I wonder if the 2nd core switch has hardware damage.
any one as any clues?
thanks
04-15-2008 11:59 AM
Hi, if the switch run for about five minutes and then it turns off could be overheating. If you have SNMP logging setup check the snmp temperture logs and see, also could be a bug in the system. Since you said this issue started after a power outage i would look at the switch power supply. next time you turn on the switch run a show log command and look for problems. Also run the show enviroment command and check the temperture on the switch, ex:output below.
HTH
nhb-eg28-sw1#show environment
no alarm
Chassis Temperature = 35 degrees Celsius
Chassis Over Temperature Threshold = 75 degrees Celsius
Chassis Critical Temperature Threshold = 95 degrees Celsius
Power Fan Inline
Supply Model No Type Status Sensor Status
------ ---------------- --------- ----------- ------- -------
PS1 PWR-C45-2800AC AC 2800W good good good
PS2 PWR-C45-2800AC AC 2800W good good good
Power supplies needed by system : 1
Power supplies currently available : 2
Chassis Type : WS-C4506
Power consumed by backplane : 0 Watts
Supervisor Led Color : Green
Module 1 Status Led Color : Green
04-16-2008 02:58 PM
thanks for the tip.
i tried that but no luck.
i even replaced the switch with another one and the same problem appears.
i disconnected all the cables from the core switch 2 and connected it to the network. started to add cable by cable (that connect to other access switches) and it seems to work. on one of the cables that connect to other switches in the network, after connecting it the network started to come down. i shut down the phones vlan and all came back again....i wonder if its spanning tree failure..... still exploring other options.
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