3548 switch with lots of underruns

I have a branch office with five 3500 series switches - all with 48 ports. Two 3550's and three 3548's. They are interconnected with Gigastack modules and SX GBIC's. I have one 3548 switch that seems to be reporting a lot of underruns on all the FE ports. Everything checks out from what I can tell. No buffer problems, etc.. I've reset the switch, but the underruns are still occuring. Attached is a show interface text document and a diagram of the environment. Any ideas would be greatly appreciated!! (Tor3548-1B is the switch in question)

The HSSI network module has two serial controllers. One controller is used for transmit packets, and the other for receive packets.The HSSI bus arbitration scheme gave preference to the transmit controller. This could lead to the receive controller being unable to access the bus in order to transfer packets into memory, leading to an overrun (which results in the packet being dropped).
The bus arbitration scheme gives equal priority to the receive controller. This will reduce the number of receive overflows. However, since the transmit controller has lower priority that before, it may increase the number of transmit underruns.

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Cisco 3548 Switch Failure

We have OpenVMS running on a Streams Environment OSI protocol connecting to a Cisco 3548 switch with fiber GBIC trunk ports. The ports display link lights, but network connection to a Windows NT 4.0 Server (Service Pack 6) with Allied Telesyn NICs (half-duplex) fails with LAN Connection Errors reported on DHCP Client Computers. However, when the Switch is bypassed, and directly connected to the Server, problem disappears. Do I have a duplex mismatch problem or IOS release issue?

You have to check to see how the switchports are configured , by default the speed is auto/auto , if the ports are hardcoded to a specific speed and duplex then you probably have a speed/duplex mismatch. Match both ends of the links , if nics are auto then the switchport should be auto . If the nics are hard set to a speed/duplex then you have to set the switchport the same.

New ESW-540 switch with cold start problems

Hi
A customer of mine is having serious problems with several ESW-500 switches.
He started a discussion under Netpro, but haven't received any answers. This might be the right group?
He wrote:
I have two new esw-540 switches (one 48 port and one 8 port),
which are making unauthorized cold starts and that gives me a lot problems.
(now it is about three switches)
I added:
Hi
My customer needs help with his problem.
Here is some more information:
There are three switches with the samHi
A customer of mine is having serious problems with several ESW-500e problem now, all with the same errormessages from his log
Ciscosw2 ESW-540-48   SN: DNI1452E71E SW Ver. 1.19 Boot Ver.1.0.0.04
Ciscosw3 ESW-540-24   SN: DNI1433E507 SW Ver. 1.19 Boot Ver.1.0.0.04
Ciscosw7 ESW-540-8     SN: CBT15230E9Z SW Ver. 1.1.19 Boot Ver. 1.0.0.07
From ciscosw7:
Nov 11 02:16:03 ciscosw7 %OS-F-MEMORY: OSMEMG_rn_free: Memory magic is invalid
***** FATAL ERROR *****
Reporting Task: BNJR.
Software Version: 2.1.19 (date 14-Jul-2010 time 17:12:34)
0x184e9c
0x182484
0x564110
0x392684
0x395998
0x568630
0x2df10c
0x2df654
0x2e1138
Nov 11 02:17:14 ciscosw7 %INIT-I-Startup: Cold Startup
And he sent me a new errormessage today:
Nov 13 01:38:14 ciscosw5
%SYSLOG-F-OSFATAL:
FATAL ERROR: BNJR: ABORT DATA exception
***** FATAL ERROR *****
SW Version : 2.1.19
Version Date: 14-Jul-2010
Version Time: 13:58:28
Instruction 0x2EFB04
Exception vector       0x10#
Program state register
0x20000013
0x002ef7ac
0x002f0390
0x002f08d8
0x002f23bc
0x00134684
Nov 13 01:39:27 ciscosw5 %INIT-I-Startup: Cold Startup
Need urgent advise...
Thank you!

Hello!
My name is Robert and I am network engineer for the Cisco SBSC. This is the correct place for the ESW500 series.
From the error messages you are seeing, I would recommend to disable the Bonjour service to see if that helps with the reboots. I am currently looking into the error messages you are getting to see if there is a solution. I would recommend giving us a call as well for immediate assistance on the error messages. Below is a link for our support center numbers.
http://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html

I've recently been given a macbook pro from uni, with lots of adobe software on. I want to pair it with my iMac which has music etc and is it possible to get the software to the imac and the files to the macbook?Giving me the best of both :-)

I've recently been given a macbook pro from uni, with lots of adobe software on. I want to pair it with my iMac which has music etc and is it possible to get the software to the imac and the files to the macbook?Giving me the best of both :-)

You would need the original installation disks or files for the Adobe software to get it onto your iMac, and having it on two computers may not be allowed by your university's licensing. Talk to whoever issued the MacBook.
As to the music, just copy it over to the MacBook, either via Home Sharing, file sharing, or an external storage medium (hard drive, USB flash drive, etc.).
Regards.

TS1587 Hello, I downloaded an ntfs systemfile from tuxera and used it to convert a usb stick, my imac froze a while after so I turned it off the on and now I have blue vertical lines on boot up and the a white screen with lots of tine blue symbols, need h

Hello, I downloaded an ntfs systemfile from tuxera and used it to convert a usb stick so I could put more than the fat32 4gb on, my Imac froze a while after so I turned it off the on and now I have blue vertical lines on boot up and the a white screen with lots of tine blue symbols after, mouse pointer moves but thats about it.
Have used R and cmd to get a menu up but once I choose one of the four options my mouse is rendered useless and I cant get any further, have downloaded, to another usb stick recovery disk assisstant and am trying to use that in conjunction with the lion option on the previously mentioned screen, computer was responding really slowly and has now frozen on the terms of software license agreement (maybe the last hurdle!) can anyone pleeeeeease help!!!!!??????

It's likely that the boot drive is failing, or that there's some other hardware fault. Run the Apple Hardware Test.
Intel-based Macs: Using Apple Hardware Test
Even if the test is negative, you should make a "Genius" appointment at an Apple Store to have the machine tested more thoroughly.

Using Catalyst 3550 Switch with Linksys Home Router and Cable Internet

I've about pulled what little hair I have out of my head on this one, and need some configuration help.
I have a Cisco Catalyst 3550 switch with five Windows 7 desktops, an Avaya PBX and five Avaya IP phones attached. All of these devices are on a 192.168.0.0/24 subnet, and are communicating properly. I will refer to this as network # 1. I also have SEPARATE network, we'll call network # 2, using AT&T ADSL service and a Netgear 4-port/wireless router/ADSL modem combo device, which is functioning properly with a couple of other Windows 7 desktops over its own wired Ethernet network, using DHCP, and also on a 192.168.0.0/24 subnet. I thought it would be a simple integration, just plugging one of the 3550's ports to one of the DSL router's ports, in order to give the five Windows 7 desktop computers on network # 1 internet access via the DSL modem. Guess I was wrong. When I connect the two switches together, although I get a good connectivity (green lights on both ports) and am able to ping the DSL router's gateway address (192.168.0.252) from network # 1's computers, the computers on network # 1 cannot access the internet. Also, the working computers on network # 2 lose their internet access as long as the two switches are connected together. I am not a Cisco guru, but there's got to be a way to make this scenario work. Can someone provide me with a 3550 configuration that will allow me to extend my internet service from network # 2 on the DSL router to my 3550 switch and their computers? Here's what I am looking for:
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The Netgear router is probably what's doing the natting. Is the 3550 configured for routing or is it straight L2? If you have the 3550 configured as L3, then it's going to be easy to do what you want. Just add a static route on the Netgear to point the subnet that it doesn't know about to the 3550. For example, if the Netgear is addressed at 192.168.1.1 and the Cisco 3550 is addressed at 192.168.1.2, but it also knows about the 192.168.0.0/24 (separate vlan), then you would put a static route on your Netgear for 192.168.0.0/24 to go to 192.168.1.2.
The way that I would do it is to create a separate vlan on the 3550 and assign an address to it. Once you do that, make the port that the other switch connects to an access port of that vlan. (It would need to be on the same subnet as the existing equipment.) All of your devices would use it as a default gateway and then you would do the rest as above. You could also use RIP between the Netgear and Cisco if you can't do static routing.
HTH,
John

After installing an update I am no longer able to hear sound out of my speakers. A red light comes on where the headphone jack is. I have already attempted to trip to switch with a wooden toothpick in the headphone jack but have not had luck.

after installing an update I am no longer able to hear sound out of my speakers. A red light comes on where the headphone jack is. I have already attempted to trip to switch with a wooden toothpick in the headphone jack but have not had luck.

Have you gone into system prefs nad made sure that the headphone port is set to audio out. And not audio in.
Also make sure that you are selecting built in speakers for your audio output.
If that does not fix it try doing a Pram reset.
Shut your mac down.
Press the startup button.
Hold down the following keys. Command Option P and R. Wait till you hear the chime 2 times. Then let go. See if that fixes it.

I have a Word doc with lots of Excel/Pdf attached doc inside. Can I convert this word doc in PDF keeping the attached documents inside the PDF? or do I have to attach all af them again? thank in advance

I have a Word doc with lots of Excel/Pdf attached doc inside. Can I convert this word doc in PDF keeping the attached documents inside the PDF? or do I have to attach all af them again? thank in advance

Attach all of them again.
Be well...

Toggle switches with if else

I am trying to toggle various switches based off of others and am wondering how I can go about this. For example, if switch A is on, B should toggle off. If I toggle B on, A should toggle off. Any help in doing this would be appreciated. Thanks.

Thank you for an easy question.....
There's a mode in the Switch options that allows you to create a single switch with two channels, where only one will be on.
- cj
Measurement Computing (MCC) has free technical support. Visit www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.

Can you share photos between computers on a local time machine network. I have iMac with lots of pictures I would like to view on my MacBook Air. Does anyone know how to do this?

Can you share photos between computers on a local time machine network? I have iMac with lots of pictures I would like to view on my MacBook Air. Does anyone know how to do this?

Can you share photos between computers on a local time machine network? I have iMac with lots of pictures I would like to view on my MacBook Air. Does anyone know how to do this?

My iPad colors are fuzzy with lots of reds and purples. Did this once before and cleared up. This time it won't clear up. Any suggestion?

My iPad colors are fuzzy with lots of reds and purples. Looks like my digital camera when it needs to be recharged if that helps describe the issue. Can anyone help?

Next step is to back up and restore via iTunes. If the problem continues, restore as a new device and test. If the problem is solved, there is some kind of corruption in your backup file. If it continues, take it to an Apple store for evaluation of a possible hardware problem.

I have 2 copies of Firefox open (two different windows with lots of tabs), if I reboot can I restore both sessions?

I have 2 copies of Firefox open (two different windows with lots of tabs), if I reboot can I restore both sessions? I am familiar with clicking history/ restore previous session, but don't want to reboot to let windows update to do it's thing unless I can restore both sessions.

If they are running different profiles, then yes.

How many BGP peers does the 3548 switch support?

Is it possible to run more than 40 peers on a single switch? What is the limitation if not?

Hi ,
You can have 40 BGP peers , IPV4 unicast routes handled by hardware is only 24000 .Enusre all your BGP peering routing updates is within this limits .
http://www.cisco.com/c/en/us/products/collateral/switches/nexus-3548-switch/data_sheet_c78-707001.html
Table 7. Hardware Specifications Common to Both Switches
Mode
Normal Mode
Warp Mode
Hardware tables and scalability
Number of MAC addresses
64,000
8000
Number of IPv4 unicast routes
24,000
4000
Number of IPv4 hosts
64,000
8000
Number of IPv4 multicast routes
8000
8000
Number of VLANS
4096
Number of ACL entries
4096
Number of spanning-tree instances
Rapid Spanning Tree Protocol (RSTP): 512
Multiple Spanning Tree (MST) Protocol: 64
Number of EtherChannels
24
Number of ports per EtherChannel
24
Buffer size
6 MB shared among 16 ports; 18 MB total
Boot flash memory
2 GB
HTH
Sandy

Change a 3560 Switch with Lifetime Waranty

A simple question:
Our client has 3560X Switches with a limited lifetime warranty. The Cisco Partner with whom they had the contract before bought the equipment, and they did not end up on good terms. One of the devices died the other day. My question is - how do we replace it now?
Thanks

I wish... here is the answer I got from TAC: "in this case there is nothing we can do to replace it as per Cisco policies and procedures customer has to engage his reseller for support."
So disappointing... Now I need to call the client and tell them they need to throw the lifetime warranty switch away and buy a new one...

HDMI switching with YV box - help?

I am now in the unfortunate position of having a TV with only one HDMI input but currently have two boxes (YouView and NowTV) that output HDMI. The one scart input is used by the DVD player and I'm aware of scart-switch problems where YV boxes are concerned too.
I bought a Duronics HDMI auto-switcher, it has three inputs and one output. I connected it up and the NowTV box displayed its bouncing logo fine. I switched on the YV box and got a pink screen. I tried unplugging the NowTV box from the mains, unplugging the HDMI lead etc. Cycling through the inputs using the manual switch - still the same pink screen, turned box on-off etc.
Has anyone managed to use a HDMI switcher and if so how or which one and if it does work, does it always work without a problem?
For info: I have a BT supplied box (the first one they sent out, Humax ..), power set to the quicker starting one (eco-mode: Low??)

I use a Thor combined HDMI/Optical switch with the YV box with no problem. Occasionally see a flash of pink when it switches then it settles down.
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One other thing I suggest you try is swapping the HDMI leads between the YV box and the Now TV device.

3548 switch with lots of underruns

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