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I have a 3Com baseline 2816 switch that I can access through management web interface. I do not have the current configuration of the switch neither the MAC address info. Is there a method to hard reset it and get the MAC address so I can have access to management interface?

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To hard reset the switch back to the defaults
use a pen or sharp object and hold the reset button on back of the switch in - then unplug/plug back in the power while the reset button is still depressed until the power led goes to solid amber - The switch is now in fail safe mode - Connect your pc/laptop to one of the front panel ports and see if you can discover the switch - if you still can't then configure your pc/laptop to the 169.254.0.0 - class B network and run the discovery again
once you have discovered the switch and can login -hit the upgrade firmware button and reload the code - you can check the progress at the bottom of the screen which has a toolbar showing the status of the upgrade

Posted on Dec 11, 2009

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Posted on Jan 02, 2017

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Forgot ip address and password


To re-enable the Console access requires the SW2900 series to be reset to its default settings via the WEB INTERFACE
- Web Interface
- Device >Configuration >Initialize To change the Default User "ADMIN" password it is necessary to use the Console connection
-Console Interface
-Once the unit has successfully booted and the prompt presented
-Enter "password" (without "")
-Enter "admin" when the system prompts for User
-Press the "Enter" key when the system prompts for "Old Password" (the ADMIN password was reset by the Web Interface commands)
-Enter "" when the system prompts for the New Password (where "" is the new product ADMIN password)
-Enter "" when the system prompts to confirm the New Password In order to complete the configuration it is necessary to save the configuration via the WEB INTERFACE
-Web Interface
-Device > Configuration > Save
Symptom:
SW2900 Baseline Switch - Default console access disabled following password change
From the web interface, the default user "admin" password is changed and console access is disabled
Cause:
When applying the new password, by default the service-type is set to "telnet". When applied, the default "terminal" setting is removed thus disabling console access.

Apr 20, 2013 | 3Com Baseline Switch 2924-SFP Plus

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

3Com Baseline Switch 2024 - Switch - 24 ports duplex light blink continusly


Is it hsappening with all the 24 ports or with some ports ?

Might be an indiacation towards the duplex mismatch.
are you getting CRC errors on the interfaces ?

Dec 05, 2010 | 3Com Baseline Switch 2024 - Switch - 24...

1 Answer

Default password is incorrect or reset doesn't work


The default ip is 192.168.1.1
default user-name and password for the 5 models of 3com are as follows.:

1.
3com default ip: 192.168.1.1
username: n/a
password: admin
or
2.
3com default ip: 192.168.1.1
user-name: adminttd
password: adminttd
or
3
3com default ip 192.168.1.1
user-name: admin
password: n/a
or
4
3com default ip 192.168.1.1
user-name: n/a
password: PASSWORD
OR
5
3com default ip 192.168.1.1
user-name: root
password: !root

ok try
this
Note that at time you will need to set your local ip of your pc from which you are acess the device to the same range...
That is for example 192.168.1.10


Good luck
uttam

Feb 26, 2010 | 3Com 2816-SFP Plus (3c16485-us) 16x1000...

1 Answer

How can configure trunk


not sure about the 3COM side, but on the Cisco side... go to the configure prompt, then the port that you need to trunk (int [interface name and number] and enter)

Once you are in the interface, use the following command:
switchport trunk encap dot1q
switchport mode trunk

Then make sure that the interface is not shut down, connect the switches together and (hopefully) the 3COM will negotiate to trunking... if not you will need to manually configure the 3com.

Hope that this helps!

Jan 07, 2010 | 3Com Switch 4500 PWR 26-Port...

1 Answer

Is this product easy to configure and manage?


The 3Com OfficeConnect Cable/DSL Secure Gateway is designed to be used by networking novices and experts alike. It offers many tools to simplify configuration, including a Configuration Wizard, Installation Guide, Gateway Discovery Tool, and an intuitive web management interface.

Feb 16, 2006 | 3Com (3CR856-95-UK) Firewall

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