Here's how to configure trunk mode interfaces
on your N-Series switch.
Trunk mode interfaces are used to connect
two switches, or a switch to a host.
Unlike access mode interfaces, trunk mode
interfaces pass traffic to multiple VLANs.
Untagged traffic is passed to the native VLAN,
or PVID by default this is VLAN 1.
Tagged traffic is passed to the indicated
VLAN.
Trunk mode observes 802.1Q tagging.
Open an command line to your switch, then
run 'enable' to enter privileged execution mode.
Note the change to the prompt.
Run 'show interfaces status' to display the
current configuration.
The current mode is indicated by 'A' for access,
'T' for trunk or 'G' for general.
Note that interfaces 9 to 11 are currently
in access mode.
To make changes run 'configure' from
the privileged execution prompt to enter global configuration mode.
Again, note the change to the prompt.
Run 'interface range x' where x is the interface
range to select.
Here we're selecting 9 to 11.
To convert them to trunk mode run 'switchport
mode trunk', then type 'exit'.
To view your change run 'show interfaces status'.
You can see the mode has changed from 'A'
for Access to 'T' for Trunk.
The associated VLANs are VLAN (1) the untagged
native VLAN, indicated by parenthesis around
its ID number, and VLANs 2 through 4093 which
are tagged.
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