Question about 3Com Baseline Switch 2024 24-Port (3C16471B)

2 Answers

3com Switch Intermittently Losing Connection.

I have a 3 buildings and a network set up that consists of three UN-managed 3com switches that are interconnected together from one building to the other(each building has its own 3com switch). NOTE: The first building has in it a LinkSys WiFi(DHCP enabled) which is connected to from my ISP's router and then to the 3com switch in the same building. I found out that the DHCP coming from the LinkSys 192.168.x.x through the switches till it gets to the Ethernet Patch Panel at the second building have no interruption until it gets to the 3COM Baseline Switch 2016/16ports in the same office. I'll have to remove and re-insert the patch cable before there will be internet, even when the internet comes, it will be intermittent. But from the first building where the internet is coming from, I cant see any intermttentcy on the link. This happen almost everyday. NOTE: Each port on the switch were tested. The switch and the test PC were power cycled respectively, all to no avail. Yet the patched port on the patch panel keeps running with DHCP without running through the switch ports in the second building. Please help and provide a permanent solution to this problem. Thanks in anticipation.

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This could be a problem with the second switch unit. what happens if you connect a pc to this cable, is that intermittent, if so, that is your problem. try fault finding with a LAN cable tester to see if there's any issue with the link cable.

Posted on Jul 19, 2013

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I have the same problem with the 3com switch its dropping the connection for about 4-5 minutes and turning up again automatically in between when iam switch up the switch which is near to the sever its getting up soon then Automatic .....
iam not getting the exact problem even i have changed the switch still no result......
Can any one help me by knowing the exact problem. Is it making the loop for that time or what?
Is there any permanent solution for this problem or not?

Thanks in Advance.

Posted on Jul 10, 2014

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Posted on Jan 02, 2017

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SOURCE: Link and activity lights on 3Com Switch ports without connection

Do the ports work when the cables are connect?  I did some re-search and this seems to be an ongoing issue with 3com switches.  It should not effect the use of the switch

Posted on Oct 27, 2007

  • 40 Answers

SOURCE: I have a 3com switch 4210, I have 2 certified

you may want to check footage over 300 ft needs cat5 extender

Posted on Mar 11, 2010

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1 Answer

Firmware update for 3Com 2952


Don't let the switch name fool you, HP calls it the HP 1910.
HP 1910 48G Switch Fixed Port Web Managed Ethernet Switches HP JE009A ABA
Technical Notes:
"The HP 1910-48G Switch (JE009A) was formerly sold as the 3Com Baseline Plus 2952 (3CRBSG5293) and may ship with this product labeling.SFP ports and copper ports work simultaneously, independent of each other to give a total of 52 Gigabit-capable ports."

Firmware download from HP:
My Networking HP Official Site

Jan 14, 2013 | 3Com Baseline Plus 2952 52 Port Gigabit...

1 Answer

Superstack 3 3848 reset at default


Hi ! I think this solution should be approached. Because this procedure is the same for switches 3Com and HP A-series with Comware OS.

1. Connect light blue console cable between a computer (serial) and the 3COM switch (RJ45 console port)

2. Open PUTTY or Xshell or HyperTerminal with a serial connection and the following settings (19200, 8, 1, N) If not connected may use 9600 or 115200 bps

Starting......

************************************************************************
* *
* 3COM 2928-SFP Plus BOOTROM, Version 119 *
* *
************************************************************************
Creation Date : Feb 3 2010
CPU L1 Cache : 32KB
CPU Clock Speed : 333MHz
Memory Size : 128MB
Flash Size : 128MB
CPLD Version : 002
PCB Version : Ver.B
Mac Address : 002473959EC8


4. When "Press Ctrl-B to enter Extended Boot menu..." appears, press "CTRL+B"

Press Ctrl-B to enter Extended Boot menu...0
Please input BootRom password:

BOOT MENU

5. Press "7" to "Skip current system configuration"

1. Download application file to flash
2. Select application file to boot
3. Display all files in flash
4. Delete file from flash
5. Modify BootRom password
6. Enter BootRom upgrade menu
7. Skip current system configuration
8. Set BootRom password recovery
9. Set switch startup mode
0. Reboot

Enter your choice(0-9): 7



7. Press "Y" to skip the current config at next reboot


The current setting will run with current configuration file when reboot.
Are you sure you want to skip current configuration file when reboot? Yes or
No (Y/N):Y
Setting...Done!


8. Now Press "0" to reboot the switch


BOOT MENU

1. Download application file to flash
2. Select application file to boot
3. Display all files in flash
4. Delete file from flash
5. Modify BootRom password
6. Enter BootRom upgrade menu
7. Skip current system configuration
8. Set BootRom password recovery
9. Set switch startup mode
0. Reboot

Enter your choice(0-9): 0



9. The switch will reboot, allow it to fully boot this time


Starting......

************************************************************************
* *
* 3COM 2928-SFP Plus BOOTROM, Version 119 *
* *
************************************************************************
Creation Date : Feb 3 2010
CPU L1 Cache : 32KB
CPU Clock Speed : 333MHz
Memory Size : 128MB
Flash Size : 128MB
CPLD Version : 002
PCB Version : Ver.B
Mac Address : 002473959EC8


Press Ctrl-B to enter Extended Boot menu...0
Starting to get the main application file--flash:/S2900-CMW520-R1101P09.bin!...
..........................................................................
The main application file is self-decompressing................................
...............................................................................
.........................Done!
System is starting...
Configuration file is skipped.
User interface aux0 is available.

10. Press "Enter", you will not need a password to login.

Press ENTER to get started.
<3Com Baseline Switch>
#Apr 26 12:00:16:292 2000 3Com Baseline Switch SHELL/4/LOGIN:
Trap 1.3.6.1.4.1.43.45.1.10.2.2.1.1.3.0.1<h3cLogIn>: login from Console VMadmin.co.uk
%Apr 26 12:00:16:461 2000 3Com Baseline Switch SHELL/4/LOGIN: Console login from aux0
<3Com Baseline Switch>

11. Now type "initialize" to delete the configuration file and reboot the switch once more, Press "Y" to accept reboot.

<3Com Baseline Switch>initialize
The startup configuration file will be deleted and the system will be rebooted. Continue? [Y/N]:Y
Please wait...
#Apr 26 12:00:33:537 2000 3Com Baseline Switch DEV/1/REBOOT:
Reboot device by command.

%Apr 26 12:00:33:641 2000 3Com Baseline Switch DEV/4/SYSTEM REBOOT:
System is rebooting now.

12. The switch will full start up again, this time completely factory reset.

Starting......

************************************************************************
* *
* 3COM 2928-SFP Plus BOOTROM, Version 119 *
* *
************************************************************************
Creation Date : Feb 3 2010
CPU L1 Cache : 32KB
CPU Clock Speed : 333MHz
Memory Size : 128MB
Flash Size : 128MB
CPLD Version : 002
PCB Version : Ver.B
Mac Address : 002473959EC8


Press Ctrl-B to enter Extended Boot menu...0
Starting to get the main application file--flash:/S2900-CMW520-R1101P09.bin!...
..........................................................................
The main application file is self-decompressing................................
...............................................................................
.........................Done!
System is starting...
Startup configuration file does not exist.
User interface aux0 is available.

13. Press "Enter", then enter the username "admin" and password "<blank>". Press "Enter" and you will be logged in.

Press ENTER to get started.

Login authentication


Username:admin
Password:
<3Com Baseline Switch>
#Apr 26 12:00:19:811 2000 this article is from VMadmin.co.uk 3Com Baseline Switch SHELL/4/LOGIN:
Trap 1.3.6.1.4.1.43.45.1.10.2.2.1.1.3.0.1<h3cLogIn>:admin login from Console
%Apr 26 12:00:19:981 2000 3Com Baseline Switch SHELL/4/LOGIN: admin login from aux0
<3Com Baseline Switch>
<3Com Baseline Switch>

14. If you type "summary" you will see all the switch details.

Amongst these details are the IP address of the switch. If you have DHCP on your network this switch is connected to it will receive one as in my case below, so I can now configure the rest via a web browser.

If not you can use the "ipsetup" command to set a static management IP and access via a web browser.


<3Com Baseline Switch>summary
Select menu option: Summary
IP Method: DHCP
IP address: 192.168.1.250
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254

Current boot app is: flash:/S2900-CMW520-R1101P09.bin
Next main boot app is: flash:/s2900-cmw520-r1101p09.bin
Next backup boot app is: NULL

3Com Corporation
3Com Baseline Switch 2928-SFP Plus Software Version 5.20 Release 1101P09
Copyright (c) 2004-2010 3Com Corp. and its licensors. All rights reserved.
3Com Baseline Switch 2928-SFP Plus uptime is 0 week, 0 day, 0 hour, 1 minute

3Com Baseline Switch 2928-SFP Plus
128M bytes DRAM
128M bytes Nand Flash Memory
Config Register points to Nand Flash

Hardware Version is REV.B
CPLD Version is 002
Bootrom Version is 119
[SubSlot 0] 24GE+4SFP Hardware Version is REV.B

<3Com Baseline Switch>



15. Once you can access the web management page for the switch make sure you set a strong password for "admin" and store it in a secure encrypted location for next time.

16. Don't forget to save your new configuration! Otherwise the switch will be at factory defaults if the power goes off!!

Jul 24, 2017 | 3Com SuperStack 3 3848 48-Port Gigabit...

1 Answer

I want to know the default ip address of 3com superstack 3 switch 4500 model and the default username and password of the device


Username:monitor Password: monitor---monitor mode, view only manager manager--can change all except security features admin (no password)--sets security features IP: 169.254.100.100 or 169.254.100.99

Jul 18, 2011 | 3Com 4500 24-Port Ethernet Switch

1 Answer

How do i Reset or break in to get reset my password on 3Com 2948 Baseline Switch 48Port SFP Plus


The resetting of the password requires the installation of a console cable to the console port.

Be sure the terminal emulator program is set to VT-100 management using compatible, 38400 baud rate, no parity, 8 data bits and Console connection one stop bit.

Use the included cable, or be sure that the pin-out complies with a standard null-modem cable

Once the cable is connected, reboot the switch. Type a Ctrl/C until you enter the failsafe mode. This will be denoted with the prompt: “CFE>”
At the prompt execute the following commands:

CFE> passwrd
CFE> reset -sysreset

At this point the password has been reset.

Jan 20, 2010 | 3Com Baseline Switch 2948-SFP Plus 48-Port...

1 Answer

3com nj220 central config error response from device


Found that the problem was in the installation of the service.

There were two .exe in the installation software, one labeled setup.exe and the other "3Com IJNJ Configuration Software.exe". setup.exe is what needs to be used and it will in turn call the other. I had opened the other directly.

Feb 08, 2009 | 3Com NJ220 Networking Switch

1 Answer

Inherited 2 switches 3com 4228g (3c17403) password problem


I haven't worked with these switches but generally settings such as ip address and factory defaults can be set through the Console Interface (CLI). You will need a null-modem cable to access this and a terminal client (Windows Hyperterminal works).

Hope that helps

Dec 31, 2008 | 3Com SuperStack 3 4228G (3C17304-US)...

2 Answers

I cann't connect to my switch


The primary connection method for those switches would be serial connection. In the box there should have been a DB9 serial to RJ45 cable. Hyperterminal default settings would allow you to connect.

Jul 25, 2008 | 3Com 4500 24-Port Ethernet Switch

3 Answers

3Com 3824


Download free version of HyperTerminal for Vista : ftp://ftp.hilgraeve.com/htpe/htpe63.exe
Make a new connection :
connect using COM1 (depends of your configuration)
19 200 bits/sec
8 data bits
No parity
1 stop bit
No control of flux

And push enter twice to display a "Login:" prompt.
Connect using default user/passwords : http://support.3com.com/infodeli/tools/switches/ss3/management/ug/setup.htm#13131

Regards,

AstroMan

Jan 14, 2008 | 3Com SuperStack 3 3824 (3cr17402-91-uk)...

1 Answer

Link and activity lights on 3Com Switch ports without connection


Do the ports work when the cables are connect?  I did some re-search and this seems to be an ongoing issue with 3com switches.  It should not effect the use of the switch

Oct 09, 2007 | 3Com 3C16985B /REF3COM SSII 24-PORT SWITCH...

1 Answer

Mini GIBIC Problem


I would try changing ports and see if that resolves the issue, if not, then run a fox and hound on the cable. even though you have a connection light on the swith in building 3 I would also try differant port or swithc, I would also check the ends of the cables to make sure both ends have a good connection. Hope this helps.

Aug 17, 2007 | HP ProCurve 2626 (J4900B) 24x10/100 Mbps...

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