How can I open the web interface of the Catalyst 2960-S?

[thomaswin]

Hello Guys,
I have bought a second-hand Cisco Catalyst C2960S-4848LPS-L. After the quick setup, I assigned it its IP address, in our case 192.168.172.2.
The switch is connected between the router and the PC, if I now want to assign the router I only get a timeout, the same for the switch.
However, it is possible to access the FritzBox web interface.
Just like establishing a connection to the Internet.
I have also tried it with the Network Management Software, but no connection to the switch can be established.

Can someone please explain why this is the case?
Attached is a picture of the quick setup.

[liviu.gheorghe]

Hello @thomaswin ,

in order to access the switch web interface on the configured IP 192.168.172.2, your PC should have an IP in the same 192.168.172.x address range.

I see from the picture you shared that you access the switch on a different IP address - 10.0.0.1 

Can you give us more details?

[thomaswin]

Hi @liviu.gheorghe ,

10.0.0.1 is the IP address with which I access the initial/quick setup of the switch.

the PC I use for the configuration is also in the same IP range,
the ip of the PC would be 192.168.172.77, but it shouldn't matter as long as the PC supports DHCP.

Regards

[liviu.gheorghe]

Who is the DHCP server in your setup? Is it the FritzBox? From what range does your DHCP assign addresses?

I think your setup is something like this:

PC (10.0.0.x)-----------FritzBox-----------Internet

Now if you want to insert the Cisco 2960 switch in this setup, between the PC and the FritzBox, you should assign it an address for the management Vlan1 in the same subnet as the PC - 10.0.0.x

[thomaswin]

The FritzBox is also the DHCP master.
In the case of the quick setup, the switch creates a web server and is then the DHCP master, but relinquishes the master role as soon as the setup is complete.

After the setup, it also automatically tries to connect to the web interface with the IP assigned to it.
In my case it is 192.168.172.2 (the IP of the switch).

However, only a timeout error message appears in the browser window.

The current situation is that the PC (192.168.172.77) accesses the Internet via the switch (192.168.172.2) on the router (192.168.172.1).

Simplified, it looks like this:
PC (192.168.172.77)--> Switch (192.168.172.2)--> Router/FritzBox (192.168.172.1)

[liviu.gheorghe]

I see what you mean now.

Looking at the documentation, the 10.0.0.1 IP comes from the Express setup, IP which remains active on the switch until you enter the write memory command. You lose the Telnet connection after entering the write memory command.

Try connecting to the console port using the light blue console cable and a terminal emulator program (Putty), enter the enable mode with the enable command, and type the write mem command. This way you should get rid of the 10.0.0.1 IP address and start using the 192.168.172.x addresses.

Here is a guide on how to connect to the switch using the console: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/hardware/installation/guide/2960_hg/hgcliset.html#94409

[marce1000]

 - Full web access usually requires correct bundle (software) being installed on the device (e.g.) :
        https://software.cisco.com/download/home/284425461/type/280805680/release/15.2.2E9
  denoted on the mentioned page , as being : .. WITH WEB BASED DEV MGR

    If that is not the case then you won' have full web access ,and downloading software requires a service contract with Cisco ; you may revert to using the CLI instead , 

  M.

[thomaswin]

Hi @marce1000 ,

I have now downloaded the universal with web based dev mgr.
What do I have to do with it now?
I am still relatively unfamiliar with this type of technology.
Regards

[marce1000]

 - You have to install it on the device with a CLI command as in (e.g.) :
            switch # archive download-sw /overwrite /reload tftp://tftp-server-name/path-to-downloaded-sw-tar-file

 M.

[balaji.bandi]

After the setup, it also automatically tries to connect to the web interface with the IP assigned to it.
In my case it is 192.168.172.2 (the IP of the switch).

However, only a timeout error message appears in the browser window.

The current situation is that the PC (192.168.172.77) accesses the Internet via the switch (192.168.172.2) on the router (192.168.172.1).

Simplified, it looks like this:
PC (192.168.172.77)--> Switch (192.168.172.2)--> Router/FritzBox (192.168.172.1)

From PC are you able to Ping Switch IP address 192.168.172.2? If YES

clear the browser cache and try or try on another browser (most case this should work, if you have not changed anything other than IP address)

if not you can try SSH to 192.168.172.2 see if you able to login (last resort is console to switch) and check - http config (or post here show run complete config to help)