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cisco switch helpful commands

Last post by zemerdon « Sun Oct 05, 2025 4:17 pm

by zemerdon » Sun Oct 05, 2025 4:17 pm

backup config tftp
copy running-config tftp:

cisco show ip
show ip int

console connect
sudo screen /dev/ttyUSB0 9600

remove stack members...

0 Replies

13633 Views

Last post by zemerdon
Sun Oct 05, 2025 4:17 pm
helpful linux commands

Last post by zemerdon « Tue Dec 09, 2025 4:15 pm
Posted in Linux
Replies: 1
by zemerdon » Sat Jun 21, 2025 5:45 am » in Linux

netstat dont list unix sockets
netstat -na --inet --inet6

find processes using mount point
sudo fuser -mv /mount/point

watch with pipe...

1 Replies

24650 Views

Last post by zemerdon
Tue Dec 09, 2025 4:15 pm

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Cisco 3650 stack configuration

Last post by zemerdon « Sat Feb 14, 2026 1:16 pm

by zemerdon » Sat Feb 14, 2026 1:16 pm

show switch: Displays stack membership and status.
show switch detail: Provides detailed stack information.
switch X renumber Y: Changes a switch...

0 Replies

1185 Views

Last post by zemerdon
Sat Feb 14, 2026 1:16 pm
Cisco 3650 third party tranceiver WORKING

Last post by zemerdon « Thu Jan 15, 2026 1:04 pm

by zemerdon » Thu Jan 15, 2026 1:04 pm

references:

error inserting 3rd party transceiver into the 10Gb SFP+ uplink port (Te1/1/3) from 1Gb uplink port (Gi1/1/1):...

0 Replies

773 Views

Last post by zemerdon
Thu Jan 15, 2026 1:04 pm
cisco switch not saving configuration

Last post by zemerdon « Fri Jan 02, 2026 6:23 pm

by zemerdon » Fri Jan 02, 2026 6:23 pm

enable
conf t
config-register 0x102
no system ignore startupconfig switch all
exit
reload

0 Replies

764 Views

Last post by zemerdon
Fri Jan 02, 2026 6:23 pm
Cipher Mismatch/No shared cipher

Last post by zemerdon « Fri Jan 02, 2026 5:38 pm

by zemerdon » Fri Jan 02, 2026 5:38 pm

conf t
#no crypto pki trustpoint TP-Self-Signed-xxxxxxxxxx
no ip http server
no ip http secure-server
ip http server
ip http secure-server
ip http...

0 Replies

788 Views

Last post by zemerdon
Fri Jan 02, 2026 5:38 pm
cisco 3650 recovery

Last post by zemerdon « Fri Jan 02, 2026 5:01 pm

by zemerdon » Fri Jan 02, 2026 5:01 pm

non-booting
flash_init
emergency-install usbflash0:/cat3k_caa-universalk9.16.12.14.SPA.bin

clean install firmware:
format flash:
copy...

0 Replies

738 Views

Last post by zemerdon
Fri Jan 02, 2026 5:01 pm
Cisco C3650X inter-vlans with pfSense and internet access

Last post by zemerdon « Sun Oct 05, 2025 3:08 pm

by zemerdon » Sun Oct 05, 2025 3:08 pm

Topology:

Physical server 1: pfsense (192.168.1.1 (internet)) - vlan1 (c3650x port 47 trunk)
Physical server 2: debian lxc1 (192.168.1.120) - vlan1...

0 Replies

5166 Views

Last post by zemerdon
Sun Oct 05, 2025 3:08 pm
cisco 2960 show unit temp

Last post by zemerdon « Sat Feb 01, 2025 5:11 pm

by zemerdon » Sat Feb 01, 2025 5:11 pm

2960s_roof_end>enable
Password:
2960s_roof_end#show env all
FAN is OK
SYSTEM TEMPERATURE is OK
System Temperature Value: 37 Degree Celsius
System...

0 Replies

142073 Views

Last post by zemerdon
Sat Feb 01, 2025 5:11 pm
Cisco 2960 hard reset

Last post by zemerdon « Sat Dec 14, 2024 11:59 am

by zemerdon » Sat Dec 14, 2024 11:59 am

Find the below steps to recovery password for Cisco 2960.

Step 1:

Power off the switch first, then press and hold the mode button while you power...

0 Replies

33370 Views

Last post by zemerdon
Sat Dec 14, 2024 11:59 am
no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffi

Last post by zemerdon « Sat Dec 14, 2024 11:49 am

by zemerdon » Sat Dec 14, 2024 11:49 am

ssh into a switch - no matching key exchange method found

sudo nano /etc/ssh/ssh_config

Locate the line ‘ # Ciphers...

0 Replies

34297 Views

Last post by zemerdon
Sat Dec 14, 2024 11:49 am
remove password

Last post by zemerdon « Sat Dec 14, 2024 11:35 am

by zemerdon » Sat Dec 14, 2024 11:35 am

enable
configure t
no enable secret
no enable password

0 Replies

30643 Views

Last post by zemerdon
Sat Dec 14, 2024 11:35 am
reset switch

Last post by zemerdon « Sat Dec 14, 2024 11:24 am

by zemerdon » Sat Dec 14, 2024 11:24 am

Reset Switch Configuration
To reset the switch to factory default, issue thee rase startup-config or write erase command. This command does not clear...

0 Replies

32041 Views

Last post by zemerdon
Sat Dec 14, 2024 11:24 am
Cisco upgrade via CLI TFTP

Last post by zemerdon « Mon Dec 09, 2024 6:35 pm

by zemerdon » Mon Dec 09, 2024 6:35 pm

3650:
software install file t new force

2960:
archive download-sw /overwrite /reload t

setup TFTP server

Upgrading a Switch by Using the...

0 Replies

31878 Views

Last post by zemerdon
Mon Dec 09, 2024 6:35 pm
port flapping

Last post by zemerdon « Tue Jan 30, 2024 10:17 am

by zemerdon » Tue Jan 30, 2024 10:17 am

A MAC Flap is caused when a switch receives packets from two different interfaces with the same source MAC address. If you are getting the behaviour...

0 Replies

32294 Views

Last post by zemerdon
Tue Jan 30, 2024 10:17 am
cisco PoE commands

Last post by zemerdon « Mon Jan 08, 2024 12:03 pm

by zemerdon » Mon Jan 08, 2024 12:03 pm

0 Replies

27927 Views

Last post by zemerdon
Mon Jan 08, 2024 12:03 pm
cisco syslog server setup

Last post by zemerdon « Mon Jan 08, 2024 12:15 am

by zemerdon » Mon Jan 08, 2024 12:15 am

On the Cisco Catalyst 2960 switch, open the Cisco command-line interface and begin a session.
Verify that you are in privileged EXEC mode on the...

0 Replies

27738 Views

Last post by zemerdon
Mon Jan 08, 2024 12:15 am
show port power options and configuration

Last post by zemerdon « Sun Jan 07, 2024 11:48 pm

by zemerdon » Sun Jan 07, 2024 11:48 pm

show power inline
c2960x-48fpd-l-01#config
Configuring from terminal, memory, or network ?
Enter configuration commands, one per line. End with...

0 Replies

28212 Views

Last post by zemerdon
Sun Jan 07, 2024 11:48 pm
ssh no matching key exchange method found

Last post by zemerdon « Sun Jan 07, 2024 11:47 pm

by zemerdon » Sun Jan 07, 2024 11:47 pm

zemerdon@NAS:~$ ssh 192.168.1.9
Unable to negotiate with 192.168.1.9 port 22: no matching key exchange method found. Their offer:...

0 Replies

27813 Views

Last post by zemerdon
Sun Jan 07, 2024 11:47 pm
Cisco 2960S enable SSH

Last post by zemerdon « Sun Jan 07, 2024 11:31 pm
Replies: 1
by zemerdon » Sun Jan 07, 2024 10:00 pm

1- Give the switch a hostname (hostname xxxxxx)

2- Give the switch a domain name (ip domain-name xxx.com)

3- Create a username and password...

1 Replies

35295 Views

Last post by zemerdon
Sun Jan 07, 2024 11:31 pm
show logs

Last post by zemerdon « Sun Jan 07, 2024 10:22 pm

by zemerdon » Sun Jan 07, 2024 10:22 pm

Show running-config

sh int

show log

0 Replies

28936 Views

Last post by zemerdon
Sun Jan 07, 2024 10:22 pm
Cisco 2960S commands CLI reference

Last post by zemerdon « Sun Jan 07, 2024 10:20 pm

by zemerdon » Sun Jan 07, 2024 10:20 pm

0 Replies

28505 Views

Last post by zemerdon
Sun Jan 07, 2024 10:20 pm
Cisco 2960S show hostname

Last post by zemerdon « Sun Jan 07, 2024 10:12 pm

by zemerdon » Sun Jan 07, 2024 10:12 pm

Switch#show running-config
Building configuration...

Current configuration : 3235 bytes
!
! Last configuration change at 01:01:04 UTC Mon Jan 2 2006

0 Replies

27593 Views

Last post by zemerdon
Sun Jan 07, 2024 10:12 pm
Configure Cisco 2960S via console port and set ip

Last post by zemerdon « Tue Dec 26, 2023 9:31 am

by zemerdon » Tue Dec 26, 2023 9:31 am

putty/securecrt

speed 9600
flow off

(find internal ip)
show ip int brief

enable
configure terminal
interface vlan 1
ip address
no shutdown
exit...

0 Replies

28461 Views

Last post by zemerdon
Tue Dec 26, 2023 9:31 am

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