We can confirm which ports or Chungking on our switches by as an example going on to switch one and
topping show interface's trunk as you can see here the command show to faces trunk shows me that gigabit
to 0 0 1 2 and 3 are set on for trunking using 80 to read one key.
The status is trunking and the native Vilain is villain one.
The villains allowed across those ports of villains 1 to 4000 in 94.
In other words we've allowed all villains the villains currently allowed and active in the management
domain are 1 10 and 20 villains in the spending tree forcing state to not pruned or 1 10 and 20.
We'll talk about spending in a moment but the port is the only port that is forwarding traffic across
a typical port one and two are currently blocked as shown here because port 1 2 and 3 are currently
blocked three spanning tree shows spending tree as an example shows me that those ports are blocking
this port is not a trunk port.
This is an access port so show interface trunk shows me in a nice simple format which interfaces are
configured for trunking which encapsulation is used and which ports are forwarding for which villans
Let's have a look at Switch to as an example on which to show interface trunk port gigabit 0 0 0 1 0
2 and 0 3.
So these interfaces are trunking the mode is on.
We're not using DTP and kept salaciousness one key status is trunking.
Native Land is VLAN 1.
The villans allowed across those ports are one to four thousand ninety four.
Currently the villans allowed an active in the management domain a 1 10 and 20 villans in spending tree
fording state and not pruned a 1 10 and 20 across all the ports at the moment Chauvel and brief shows
me that to only have a villain 1 10 and 20 configured on the switch and hence the switch is forwarding
those villans across those ports one 10 and 20 is forwarded across Port gigabit 0 1 2 and 3 spending
trees and not blocking any of these ports and I can see that by tapping shows spanning tree as you can
see here all those ports are forwarding and they are designated ports because the switch is the root
switch where as on switch one once again shows spending tree shows me that the switch is not to the
router bridge or router switch of the spending tree these ports 1 2 and 3.
So 1 2 and 3 are blocking show interface trunk shows me that those ports are trunk ports but only gigabit
00 is forwarding Villines 1 10 and 20 across.
So showing defaces trunk is a very useful command to see a summary of your trunk's.