====== CLI ======

===== info =====

<code bash>
sh ver
</code>
===== passwords =====

<code>
conf term
username admin privilege 15 secret password123
enable secret 0 <pass>
! for telnet:
line vty 0 4
login
password <pass>
end
wr
copy run start
</code>


===== STARTUP_CONFIG_IGNORED =====

<code>
%SYS-6-STARTUP_CONFIG_IGNORED: System startup configuration is ignored based on the configuration register setting.
</code>

<code>
sh version
...
Configuration register is 0x141
</code>

[[https://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/50421-config-register-use.html]]

<code>
enable
dir
conf term
boot system flash bootflash:cat4500-ipbasek9-mz.122-54.SG1.bin
exit
wr
copy run star

config-register 0x102

reload
</code>


===== Console baud rate =====
It is possible to switch console baud rate after boot. It will be applied after system will bootup and executes startup-config.

<code bash>
configure terminal
line con 0
speed 9600
! note: now you need to reconfigure your terminal client to different baud rate
end
wr
copy run star
</code>


===== LLDP =====
Link Layer Discovery Protocol

<code>
enable
config terminal
lldp run
exit
copy run start

show lldp neighbors
</code>
===== PoE =====
  * ''show power inline''

===== Enable SNMP =====

<code cli>
enable
configure terminal
snmp-server community public ro
snmp-server contact <itadmin@grinn-global.com>
snmp-server location GRINN - Serwerownia
exit
copy run start
</code>


===== reload =====

Reboots switch:
<code>reload</code>


===== Find MAC on ports =====

<code>
sh mac address-table vlan 1
sh mac address-table vlan 1 | include 50eb\.f62e
</code>

<code>
show interface Gi0/40
show controllers
</code>


===== show port counters =====

<code cli>
show interface counters

enable
clear counters
</code>

===== diagnose port =====

<code cli>show interface Gi0/17</code>

Using Time Domain Reflectometer

<code cli>
enable
test cable-diagnostics tdr int Gi0/17
show cable-diagnostics tdr int Gi0/17
</code>

===== VTP =====

<code>
Jul 11 05:50:11.999: %DTP-5-DOMAINMISMATCH: Unable to perform trunk negotiation on port Gi1/1 because of VTP domain mismatch.
</code>

Disable VTP:
<code>
enable
conf term
interface range Gi1/1-48
switchport mode access
switchport nonegotiate
end
wr
copy run star
</code>

Set VTP domain
<code>
conf term
vtp domain home
vtp mode transparent
vtp password home
end
wr
copy run star
</code>


===== SNMP =====

<code>
enable
switch# configure terminal
switch(config)# snmp-server community public RO
switch(config)# exit
switch# copy running-config startup-config
</code>