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Catalyst 6500 Series Switch Command Reference—Release7.6
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Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands show trunk
show trunk
To display trunking information for the switch, use the show trunk command.
show trunk [mod[/port]] [detail] [extended-range]
Syntax Description
Defaults This command has no default settings.
Command Types Switch command.
Command Modes Normal.
Usage Guidelines Entering the show trunk command without specifying a module or port number displays only the
actively trunking ports. To display the trunking configuration for a port that is not actively trunking,
specify the module and port number of the port you want to d ispl ay. The MSM port dis pl ays a s a p or t
that is always trunking, with allowed and active VLANs for each VLAN configured on the MSM.
Entering the show trunk command displays untagged traffic received over the dot1q trunk. For ISL
trunks, packets are tagged on all VLANs (including native VLANs).
In the show trunk detail command output, the Peer-Port field displays either the module and port
number of the peer connection or multiple or unknown. Multiple is displayed if connected to shared
media, and unknown is displayed if DTP is not running on the other side.
If you enter the show trunk command on a trunk where a VTP domain mismatch exists, an asterisk is
displayed after the trunk status and this message appears:
* - indicates vtp domain mismatch.
In the show trunk command output, the ports and VLANs listed in the spanning tree forward state and
not pruned fields are the same regardless of whether or not VTP or GVRP is running.
mod (Optional) Number of the module.
port (Optional) Number of the port on the module.
detail (Optional) Shows detailed information about the specified trunk port.
extended-range (Optional) Shows trunking information for extended-range VLANs.