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VLAN Commands
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Command Usage
• When creating a protocol-based VLAN, only assign interfaces via this
command. If you assign interfaces using any of the other VLAN commands
(such as vlan on page 4-190), these interfaces will admit traffic of any protocol
type into the associated VLAN.
• When a frame enters a port that has been assigned to a protocol VLAN, it is
processed in the following manner:
- If the frame is tagged, it will be processed according to the standard rules
applied to tagged frames.
- If the frame is untagged and the protocol type matches, the frame is
forwarded to the appropriate VLAN.
- If the frame is untagged but the protocol type does not match, the frame is
forwarded to the default VLAN for this interface.
Example
The following example maps the traffic entering Port 1 which matches the protocol
type specified in protocol group 1 to VLAN 2.
show protocol-vlan protocol-group
This command shows the frame and protocol type associated with protocol groups.
Syntax
show protocol-vlan protocol-group [group-id]
group-id - Group identifier for a protocol group. (Range: 1-2147483647)
Default Setting
All protocol groups are displayed.
Command Mode
Privileged Exec
Example
This shows protocol group 1 configured for IP over Ethernet:
Console(config)#interface ethernet 1/1
Console(config-if)#protocol-vlan protocol-group 1 vlan 2
Console(config-if)#
Console#show protocol-vlan protocol-group
ProtocolGroup ID Frame Type Protocol Type
------------------ ------------- ---------------
1 ethernet 08 00
Console#