F5F Stay Refreshed Power Users Networks The device is showing an error when trying to launch the Express Setup window.

The device is showing an error when trying to launch the Express Setup window.

The device is showing an error when trying to launch the Express Setup window.

H
Hidekih
Posting Freak
849
12-24-2025, 06:03 PM
#1
I just acquired a Cisco 3850-48 switch and was following this manual to get it operational: https://www.cisco.com/c/en/us/td/docs/sw...gfId-66590. I ran into an issue where I can't open the Express Setup window after entering 10.0.0.1. When I tried clearing any preconfigured settings repeatedly, restarted the switch, swapped cables, and toggled DHCP status, nothing worked. I’m stuck. I can still reach the console via Putty, which might be useful. Any suggestions?
H
Hidekih
12-24-2025, 06:03 PM #1

I just acquired a Cisco 3850-48 switch and was following this manual to get it operational: https://www.cisco.com/c/en/us/td/docs/sw...gfId-66590. I ran into an issue where I can't open the Express Setup window after entering 10.0.0.1. When I tried clearing any preconfigured settings repeatedly, restarted the switch, swapped cables, and toggled DHCP status, nothing worked. I’m stuck. I can still reach the console via Putty, which might be useful. Any suggestions?

_
_Khioz_
Member
57
12-24-2025, 07:53 PM
#2
No, I didn't change your IP address on the local machine.
_
_Khioz_
12-24-2025, 07:53 PM #2

No, I didn't change your IP address on the local machine.

B
Barbarian1022
Junior Member
5
12-26-2025, 11:10 AM
#3
I attempted that, but it failed. Cisco clearly advises against it since the switch functions as a DHCP server during configuration.
B
Barbarian1022
12-26-2025, 11:10 AM #3

I attempted that, but it failed. Cisco clearly advises against it since the switch functions as a DHCP server during configuration.

M
Meowables
Senior Member
608
12-26-2025, 08:29 PM
#4
The command displays the installed software details and version information.
M
Meowables
12-26-2025, 08:29 PM #4

The command displays the installed software details and version information.

V
Vile666
Member
53
12-26-2025, 10:16 PM
#5
The latest software version appears to be 03.02.02.SE. There were issues with Chrome warning about unsafe connections and outdated TLS settings. After fixing the security problem by turning on SSL 3.0, I encountered a prompt for a username and password, but the usual one didn't work. (Approximate translation from German) I'm trying to figure out what's happening and see if a fix is possible... EDIT2: Once resolved, it asked for login credentials, which the default password didn't accept. Great x.x
V
Vile666
12-26-2025, 10:16 PM #5

The latest software version appears to be 03.02.02.SE. There were issues with Chrome warning about unsafe connections and outdated TLS settings. After fixing the security problem by turning on SSL 3.0, I encountered a prompt for a username and password, but the usual one didn't work. (Approximate translation from German) I'm trying to figure out what's happening and see if a fix is possible... EDIT2: Once resolved, it asked for login credentials, which the default password didn't accept. Great x.x

G
211
12-26-2025, 11:33 PM
#6
Here are some possible usernames and passwords you might have tried:
- cisco/cisco admin/admin
- admin admin
- admin admin/cisco
- cisco/admin

You can also attempt the username alone if no password was set.
G
GekkeSchildpad
12-26-2025, 11:33 PM #6

Here are some possible usernames and passwords you might have tried:
- cisco/cisco admin/admin
- admin admin
- admin admin/cisco
- cisco/admin

You can also attempt the username alone if no password was set.

A
Aiirr
Member
109
12-27-2025, 08:46 AM
#7
I also attempted to reset the switch, which cleared the NVRAM and appeared successful. At least now I’m prompted for a password when entering enable in the console, and it seems Cisco is using the correct one. It might have been an outdated configuration or something similar. However, I can’t access the web interface anymore. Thanks for sharing the list of username/password pairs—I’ll try them once I’m back online. EDIT: None of the entries worked; the system mentions "level_15_or_view_access." Not sure what that refers to.
A
Aiirr
12-27-2025, 08:46 AM #7

I also attempted to reset the switch, which cleared the NVRAM and appeared successful. At least now I’m prompted for a password when entering enable in the console, and it seems Cisco is using the correct one. It might have been an outdated configuration or something similar. However, I can’t access the web interface anymore. Thanks for sharing the list of username/password pairs—I’ll try them once I’m back online. EDIT: None of the entries worked; the system mentions "level_15_or_view_access." Not sure what that refers to.

S
SlayFuzzy
Member
180
12-31-2025, 04:05 PM
#8
If you can connect using PuTTY, executing "show run" and sharing the complete result here would be helpful. This lets us verify whether the device has been restored to its original state. The main concern, though, is whether you intend to use the switch—likely the CLI is the simpler approach.
S
SlayFuzzy
12-31-2025, 04:05 PM #8

If you can connect using PuTTY, executing "show run" and sharing the complete result here would be helpful. This lets us verify whether the device has been restored to its original state. The main concern, though, is whether you intend to use the switch—likely the CLI is the simpler approach.

E
emstay26
Senior Member
441
01-02-2026, 01:45 AM
#9
You could simply run the command line tool. If the system is set to default, connect via console into the switch and assign a privilege 15 user, then activate the web interface when needed.
E
emstay26
01-02-2026, 01:45 AM #9

You could simply run the command line tool. If the system is set to default, connect via console into the switch and assign a privilege 15 user, then activate the web interface when needed.

T
td0703
Member
177
01-02-2026, 02:09 AM
#10
I don't possess detailed strategies. I acquired it mostly for free and am now utilizing it to deepen my understanding of networking. I plan to apply it later for a home setup (just for fun). The CLI option seems adequate, but I'd favor the web version if possible. Since there was no "show run" command, I resorted to using "show running-config".

That should be what you intended: Switch#show running-config
Current setup: 5433 bytes! Last update at 07:02:13 UTC Thu Nov 1 2018
Version: 15.0
No service pad service timestamps
Debug datetime: msec
Log datetime: msec
No service password encryption
Service compression: enabled

Hostname: Switch
Boot start marker: active
Boot end marker: active

VRF definition: Mgmt-vrf
Address family: IPv4
Exit family: IPv6

No AAA new-model switch provisioning detected.

1. No AAA new-model switch provisioning
2. 1 provisioning command used (vrf)
3. Last change recorded at 07:02:13 UTC
4. Configuration version 15.0
5. Service timestamps are enabled
6. No service password encryption applied

Switching to web interface would be preferable if it runs smoothly.
T
td0703
01-02-2026, 02:09 AM #10

I don't possess detailed strategies. I acquired it mostly for free and am now utilizing it to deepen my understanding of networking. I plan to apply it later for a home setup (just for fun). The CLI option seems adequate, but I'd favor the web version if possible. Since there was no "show run" command, I resorted to using "show running-config".

That should be what you intended: Switch#show running-config
Current setup: 5433 bytes! Last update at 07:02:13 UTC Thu Nov 1 2018
Version: 15.0
No service pad service timestamps
Debug datetime: msec
Log datetime: msec
No service password encryption
Service compression: enabled

Hostname: Switch
Boot start marker: active
Boot end marker: active

VRF definition: Mgmt-vrf
Address family: IPv4
Exit family: IPv6

No AAA new-model switch provisioning detected.

1. No AAA new-model switch provisioning
2. 1 provisioning command used (vrf)
3. Last change recorded at 07:02:13 UTC
4. Configuration version 15.0
5. Service timestamps are enabled
6. No service password encryption applied

Switching to web interface would be preferable if it runs smoothly.