{{tag>[network cisco ios]}}
=====Cisco Catalyst 3750G - IOS commands=====

====Network status====
===Disable telnet / enable ssh===
<code>
sh ver  #you need a k9 version image, update if needed
ip domain-name yourdomain.com
...
...

</code>
===Test cable===
  test cable-diagnostics tdr interface gigabitEthernet1/0/1
  show cable-diagnostics tdr interface gigabitEthernet1/0/1
===Interface status===
  show interface status
===MAC address table===
  show mac-address-table

===Ping===
<code>
debug ip packet detail # don't do this on high traffic switch!

ping 12.0.0.2 

no debug ip packet detail
</code>


====VLAN====

===Show VLANs===
  show run vlan
or
  vlan database
  show
  
===Create VLAN===
<code>
enable
conf t

interface GigabitEthernet1/0/1
switchport access vlan 600
ctrl-z

write
</code>

===Name VLAN===
<code>
interface vlan 800
description "text"
</code>
===Delete VLAN===
Put interfaces in VLAN 1, then...
<code>
enable
conf t

no vlan 600
ctrl-z

write
</code>
You can also delete a range
  no vlan 2-200
  
===Configure IP-address on VLAN===
<code>
enable
conf t

interface vlan 600 
ip address 1.2.3.4 255.255.255.0
ctrl-z
ip default gateway 1.2.3.1
ctrl-z

write
</code>

===Put interface in VLAN===
<code>
enable
conf t

interface GigabitEthernet1/0/1
switchport host
switchport access vlan 600
ctrl-z

write
</code>

====VTP====
===domain name===
Change name to Null.
<code>
enable
conf t

vtp domain Null
ctrl-z

show vtp status
write
</code>

===VTP mode disabled===
<code>
enable
conf t

vtp mode transparent
ctrl-z

show vtp status
write
</code>