Chapter 19
| VLAN Commands
Configuring IP Subnet VLANs
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show interfaces
protocol-vlan
protocol-group
This command shows the mapping from protocol groups to VLANs for the selected
interfaces.
Syntax
show interfaces protocol-vlan protocol-group [interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12/28)
port-channel channel-id (Range: 1-8/12)
Default Setting
The mapping for all interfaces is displayed.
Command Mode
Privileged Exec
Example
This shows that traffic entering Port 1 that matches the specifications for protocol
group 1 will be mapped to VLAN 2:
Console#show interfaces protocol-vlan protocol-group
Port Protocol Group ID VLAN ID Priority
-------- ----------------- ------- --------
Eth 1/ 2 1 1 0
Console#
Configuring IP Subnet VLANs
When using IEEE 802.1Q port-based VLAN classification, all untagged frames
received by a port are classified as belonging to the VLAN whose VID (PVID) is
associated with that port.
When IP subnet-based VLAN classification is enabled, the source address of
untagged ingress frames are checked against the IP subnet-to-VLAN mapping
table. If an entry is found for that subnet, these frames are assigned to the VLAN
indicated in the entry. If no IP subnet is matched, the untagged frames are classified
as belonging to the receiving port’s VLAN ID (PVID).
Table 102: IP Subnet VLAN Commands
Command Function Mode
subnet-vlan Defines the IP Subnet VLANs GC
show subnet-vlan Displays IP Subnet VLAN settings PE
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