Re: Cisco Switch Power Probs [7:80633] posted 12/11/2003
well the DOS an occur with any IOS prior to 12.3 with a PIM attack (
protocol 50 ) or a similar one.
But you haven't answered to the fulcral question is there any other
equipment connected to the same UPS ??
Believe that sometimes there such a potential diference ( voltage ) between
devices that they use each other has grounding actually have been to some
network instalation that the racks were the routers were gave quite a jolt.
So check your grounding.
The inline power is a facility that some switches have to provide voltage to
power IP phones so if someone by mistake connects a inline power ethernet
port switch to a normal switch you will get weird effects like ethernet
ports burned, espontaneous reloads etc-
""Matt Saunders"" wrote in message
> Hi Group
> Has anyone got any tips on how to troubleshoot cisco switch power resets??
> I have a couple that seem to be randomly rebooting and am trying to figure
> out whether i have a power supply problem or whether im suffering from DOS
> attacks and the switches are rebooting as a result.
> They are Cisco 2950 with the following IOS -
> Also, any ideas at what point the switches or routers for that matter
> through loss of power, I am beginning to wonder whether the UPS i use to
> provide backup are not switching to battery power quick enough and the
> device reboots because it notices this minor switch from mains to battery
> and according to the UPS spec the change over time to batteries are around
> 2 - 4ms...
> Any advice or suggestions on how to troubleshoot this would be great.
> Merry Xmas to you all...
> **Please support GroupStudy by purchasing from the GroupStudy Store:
> FAQ, list archives, and subscription info:
Message Posted at:
**Please support GroupStudy by purchasing from the GroupStudy Store:
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html