Cisco Core Switch loses power, network loses it's mind!

This past weekend we lost power for a long duration at our main facility. When power was restored everything started up normally, but on Monday we started to have networking issues. I did some fast troubleshooting, then realized perhaps I should get the original architects of our network involved. They are apparently no longer in business... (great!) So I asked the former IT manager who still works for the company if he had the build data or anything. He did not, and also apparently is clueless about the setups. I noticed the core had unusually high CPU usage. 99% over long durations. My initial trouble shooting started by switching off blades at a time to see if the usage went down... the last blade was the culprit. Unfortunately, it's the blade that connects the other buildings on this site to the network. Slowly enabling 1 interface...
This topic first appeared in the Spiceworks Community

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Hello experts,
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1Gbps backbone between the switch and router? Where can I find the information?
Go HERE.
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I want to know why there is Dedicated supervisor engine slot numbers in core switch.
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Hi,
I think the reason behind a dedicated slots for Supervisors of 4500/6500 chasis is due to the architectural constraints.
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"Please rate the post if found useful"

Cisco 2960s Switch replacement

Greetings,
Dear Experts,
We are using the Cisco 2960s Switches in our network. We have two failed switches and asked for replacement from our supplier. They informed that the 2960s model is approaching End Of Service (EOS) and the replacement of that model are as below:
1- WS-C2960X-24TS-L
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Many thanks in advance for your kind assistance.
Thanks and Regards

We have two failed switches and asked for replacement from our supplier.
Time for you to talk to your supplier. Cisco has announced the EoS/EoL for the 2960S back in November 2014 (End-of-Sale and End-of-Life Announcement for the Cisco Catalyst 2960-S Series and 2960-SF Series Switches). However, this only means the date of November 2014 is just a date of announcement. The final date of sale for the 2960S is November 2015.
I think your supplier either is getting confused (didn't read the announcement properly or didn't know) or is just looking for ways to make more money.
is there a possibility for conflict with the existing 2960s Switches?
You can form a stack of 2960S and 2960X. Just know the limitations, and they are:
1. The entire stack must have the same IOS versions;
2. The stack speed will drop from 20 Gbps (2960X) to 10 Gbps because 2960S has been set to run only at this speed; and
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Zen Micro lose Power when Switched OFF??

Hello,
I was wondering if anyone else is experiencing the same problem as me. I fully charged my Zen Micro last night and then left it and just switch it on for the first time now (8 hours later), and the battery indicator shows 2 bars left?
Seems like the Zen Micro loses power even when switched off!?!
Can anyone confirm that this is the case and whether I can do anything to stop it from happening? Is this normal with Hard Dri've MP3 player or only with the Zen Micro?
Thanks.

<EDIT: (April st, 2005):<<FONT color=#330000>JazzMC has taken the initiati've and written a sort of FAQ and put together a website with all the information to date gathered in one place regarding this power drain of the Zen Micro while off (in standby). It's a great read for those who want more information about the subject and probably easier than wading through this thread.<FONT color=#330000>You can view the document by clicking here: <Zen Micro Power Loss<. <FONT color=#330000>Thanks JazzMC!
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One wierd thing I noticed was I charged it full then left it sit for about 3 days (checking it off and on) then on day 3 it was at one bar. So I plugged it into my home sterio and turned it on to see how long it would play for. I was really surprised to see it last a few minutes shy of 9 hours...
Could this be a battery calibration thing instead of it just loosing charge? Like the meter misreads the batteries actual charge over time instead of it loosing power?
Donno it's wacky, please fix Creative!
Message Edited by Moxy on 04-02-2005 02:47 PM

Airport loses my network, but not airport extreme signal

Since upgrading to leopard (10.5.1), my wireless network of computers (I am using an imac & mac pro book and a new airport extreme 802.11n base - all of which have worked without problems since networking them 6 months ago), will sometimes not show my own network as a network option in the airport status indicator in the menu bar (this happens sporadically with no apparent regularity). I have 4 bars of airport signal reception and I can even see the networks available around me, but mine will not be there. Usually it will pick it back up if I turn airport off and then reopen it but sometimes I have to restart the whole computer. This doesn't seem to be systemic in that one computer may lose the network while the other is working fine....any ideas. I have seen a lot of postings about wonky airport performance with the new leopard OS, but I couldn't find an answer to this.

Hi, (Sorry this is the first time I've posted on a forum)
I had a similar problem. I had successfully set up a network with 2 window computers, running XP and Vista,and an airport extreme. Works great so long as I don't upgrade the firmware on the basestation to 7.2.1.
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Hope this is of help.

Losing all LDOM config when t2000 loses power.

Hi
I have had this happen twice now..
The t2000 i have been testing on has lost power and i have lost all config
before power outage
t20005[home/gwilson]# ldm list
Name State Flags Cons VCPU Memory Util Uptime
primary active -t-cv SP 4 4G 1.6% 6h 32m
ldm1 active -t--- 5000 4 1G 1.5% 4h 19m
ldm2 active -t--- 5001 4 1G 9.9% 1h 46m
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Notice: the LDom Manager is running in configuration mode. Configuration and
resource information is displayed for the configuration under construction;
not the current active configuration. The configuration being constructed
will only take effect after it is downloaded to the system controller and
the host is reset.
Name State Flags Cons VCPU Memory Util Uptime
primary active -t-cv SP 24 8064M 17% 14m
ldm1 inactive -----
ldm2 inactive -----
ldm3 inactive -----
t20005#
is this a bug?
i have rebooted the machine fine and it works no problem but it seems
when you lose power to the machine it all goes bad..

ok,
when i set them up i did run ldm add-config initial and reboot.
having more of a poke around and it looks like when the t2000 loses power and then comes back it is set to use factory-default config
t20005# ./ldm ls-config
factory-default [current]
initial
so i then set it to use initial config and reboot and it comes back fine
ok sc> bootmode config="initial"
sc> poweroff
Are you sure you want to power off the system [y/n]? y
sc>
sc> poweron
sc> console
t20005# ./ldm ls-config
factory-default
initial [current]
t20005# t20005# ./ldm list
Name State Flags Cons VCPU Memory Util Uptime
primary active -t-cv SP 4 4G 0.5% 14h 45m
ldm1 inactive -----
ldm2 inactive -----
ldm3 inactive -----
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Greetings Macistas - I hope somebody can help with this one.
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iMacG5 Mac OS X (10.4)

Hello and Welcome back to Apple Discussions.
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I have been using a couple of different types of wired optical mice (Logitech and Razor) on two types of Macs (G4 and Mac Pro desktop)running 10.4 and experiencing a problem where the mouse suddenly loses power. The computers are not networked with each other. To get the mouse to work again I need to unplug it (they are USB mice) and plug it back in again. Any idea what is causing this problem?

Digging into my way back machine, I do remember having this once on a G4, iirc, I fixed it by using Applejack...
http://www.versiontracker.com/dyn/moreinfo/macosx/19596
After installing, reboot holding down CMD+s, (+s), then when the DOS like prompt shows, type in...
applejack AUTO
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The 6 things it does are...
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Repair Permissions.
Clear out Cache Files.
Repair/check several plist files.
Dump the VM files for a fresh start.
Trash old Log files.
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Disconnect the USB cable from any UPS so the system doesn't shut down in the middle of the process.

New airport extreme loses power.

I am using my new ME918LL/A Airport Extreme as a bridge to extend a home network. After several hours the unit will lose power as is indicated by the light going out and the unit being unavailable on Airport Utility. Resets do not work, the only option is to unplug and plug in the unit.

Hi Bob, thanks for your reply... here goes:
First thing to note, when Airport Utility is opened it may take several launches before it even recognizes the ABS. Also, sometimes the status in the Airport Utility says Orange/Yellow for the internet connection even when we can test the connection directly to a MacBook Air and it's fine.
In the smaller window that appears, check to see if there is a listing for Status
If yes, click on the green or amber dot next to Status, and post back the message that you see there
No Status label.
Next, click on Edit in the lower right corner of the same window
Click the Internet tab at the top of the next window
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DHCP
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How many characters, including blank spaces, are there in the name?
Are there any special characters, like an apostrophe, asterisk, dollar sign, etc in the name?
19 characters, no special characters, two spaces
Click the Wireless tab
Note the Wireless Network Name
How many characters, including blank spaces, are there in the name of the wireless network?
Are there any special characters, like an apostrophe, asterisk, dollar sign, etc in the name?
9 characters in the network name, no special characters, no spaces.
The Yosemite operating system has a number of network bugs that are creating issues for a number of users. Are you running Yosemite on your Mac?
Yes, Yosemite on all three Macs, but, again, never had any issue with networking with the previous Airport Extreme. The only thing different between this ABS and the previous one is that i enabled the separate 5Ghz networking option.

Cisco DCNM 6.2 does not support most of the switches in my network

Hi All,
I have just installed Cisco DCNM 6.2. I have run a discovery using SNMP v1 my core switch which is a 3750G stack. DCNM discovers all my switches but does not support the 2960 and 3750 switches. The only switches I can select to manage and are supported are a 4510 and 3550. I have also run another discovery using SNMPv3 on a different core switch (Nexus 3K) at one of our remote sites. DCNM found all the other 2960s in that network but I can only select the two Nexus switches in the core to manage. What do I need to do to be able to manage all my switches switch?
Thank you in advance.

Hello,
DCNM is meant for data centre network management and as such only supports the MDS, Nexus and the 6500 series switches, see the RN under supported Cisco platforms and software:
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/dcnm/release/notes/dcnm_6_2_5a_relnotes.html#pgfId-314209
For the discovery issue DCNM should 'see' the other devices so you need to have a look at your SNMP and CDP (used for neighbour discovery on a per hop basis) settings on each of the devices.
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Regards
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All devices on network lose internet connection when Dell laptop connected

I have successfully setup my AEBS network and am using two wireless clients--HP printer and Xbox access point (both 802.11 G) and a wired iMac that also is connected via Airport (so I can move it around if i want). I tried connecting my Dell Latitude D830 wirelessly and within a few minutes of connecting the AEBS loses internet connectivity. Unplugging and restarting the AEBS restores the internet but it just drops off again in less than 10 minutes. My question is, what might be causing this and what can I do about it? One peculiar thing to me is that I am using the WEP security option since the Xbox doesn't seem to support WAP2. When connecting the Xbox it reports the network as WEP but the HP printer and Dell Laptop but suggested the network was indeed WAP even though I'm clearing using WEP security. Maybe it's nothing but wanted to add for completeness.
The Dell is running Vista Enterprise edition.
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I've noticed a similar issue. Any time my HP/Vista laptop is connected to my AEBS it loses the network connection at inconsistant time intervals(~10-15 min).

I have a problem with my iphone 4. My 3G always stays activated but I lose my network signal. The bars all get lost and I'm not able to receive / send sms, mms or phone calls. Could you guys please help me fix this problem? Ios 5.1.1

I have a problem with my iphone 4. My 3G always stays activated but I lose my network signal. The bars all get lost and I'm not able to receive / send sms, mms or phone calls. Could you guys please help me fix this problem? Ios 5.1.1

I haven't gotten a new sim card because the problem has been presenting itself in various cards not only mine. So far, all I've done is reset my network settings.
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I have a Slate 500 that loses power whenever it is removed from it's docking station. This began occuring after I used to HP supplied recovery disks to restore the tablet to it's original WIndows 7 Pro setting. I had installed WIndows 8 on the tablet but did not like the response time...however I was able to use it away from the docking station with a problem when WIndows 8 was installed. The problem started when I reverted back to WIndows 7. Am I missing a driver that activates the battery? I need help in resolving this. Thanks.

Hello Ahernandpr,
Your Slate 500 is a Business model. Your issue would be best answered on the HP Enterprise Business Community Forums
Good luck!
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Windows 8.1 in Bootcamp on iMac27 - USB Joystick loses power?

I have a Saitek joystick I use for flying games. It works great on my ancient Dell XP machine.
However, having bought a 27" iMac last week, installed Windows 8.1 in Boot Camp on it - the joystick loses power after a minute when I'm in a game.
I'm not sure if the power even stays on the joystick long enough for a game (such as Battlefield 3) to see the controller.
It's USB.
Right now, the same USB port on the iMac is charging my iPhone just fine, sync too. So, the port is good and the joystick on another system is good - just don't know why the lights go out on the stick and it becomes "dead" as it were?

I would suspect the win8.1 driver more then I would tink bootcamp or the imac being the issue
usb in general should not require more then 5volts and 0.5Amp
you can try connecting a power usb hub (this is a device which have 1 connector it connects to the port on the computer and then have several ports you can connect other usb devices to)
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driver for the joystick or driver because you did not install the require apple drivers for windows made in bootcamp in osx

Cisco Core Switch loses power, network loses it's mind!

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