Viewing the configuration for a particular VLAN (CLI)

Syntax:


show vlans <vlan-id>

Uses the VID to identify and display the data for a specific static or dynamic VLAN.

The following describes the fields displayed with this command (see example output):

802.1Q VLAN ID

The VLAN identification number, or VID.

Name

The default or specified name assigned to the VLAN. For a static VLAN, the default name consists of VLAN-x where x matches the VID assigned to that VLAN. For a dynamic VLAN, the name consists of GVRP_x where x matches the applicable VID.

Status

Port-Based: Port-Based, static VLAN.
Protocol: Protocol-Based, static VLAN
Dynamic: Port-Based, temporary VLAN learned through GVRP. See GVRP.

Voice

Indicates whether a port-based VLAN is configured as a voice VLAN. See Using voice VLANs.

Jumbo

Indicates whether a VLAN is configured for Jumbo packets. For more on jumbos, see "Port Traffic Controls" in the management and configuration guide for your switch.

Port Information

Lists the ports configured as members of the VLAN.

DEFAULT

Shows whether a port is a tagged or untagged member of the listed VLAN.

Unknown VLAN

Shows whether the port can become a dynamic member of an unknown VLAN for which it receives an advertisement. GVRP must be enabled to allow dynamic joining to occur.

Status

Shows whether the port is participating in an active link.

Displaying information for a specific static VLAN

switch(config)#show vlans 22

Status and Counters - VLAN Information - VLAN 22

 VLAN ID : 22
 Name : VLAN22
 Status : Port-based
 Voice : Yes
 Jumbo : No

 Port Information Mode     Unknown VLAN Status
 ---------------- -------- ------------ ----------
 12               Untagged Learn        Up
 13               Untagged Learn        Up
 14               Untagged Learn        Up
 15               Untagged Learn        Down
 16               Untagged Learn        Up
 17               Untagged Learn        Up
 18               Untagged Learn        Up

Displaying information for a specific dynamic VLAN

The following example shows the information displayed for a specific dynamic VLAN. The show vlans command lists this data when GVRP is enabled and at least one port on the switch has dynamically joined the designated VLAN.

switch(config)# show vlans 22

 Status and Counters - VLAN Information - VLAN 22

  VLAN ID : 33
  Name : GVRP_33
  Status : Dynamic
  Voice : No
  Jumbo : No

  Port Information Mode     Unknown VLAN Status
  ---------------- -------- ------------ ----------
  6                Auto     Learn        Up