Verifying The Interface Configuration - Cisco Nexus 1000V Configuration Manual

Configuring Layer 2 Interfaces
Before You Begin
• Know that the vlan dot1q tag native global command changes the behavior of all native VLAN ID
• Know that this feature applies to the entire device; you cannot apply it to selected VLANs on a device.
• Know that the Cisco Nexus 1000V commands may differ from the Cisco IOS commands.
If you enable 802.1Q tagging on one device and disable it on another device, all traffic is dropped on the
Note
device with this feature disabled. You must configure this feature identically on each device.
Procedure
Step 1
Step 2
Step 3
Step 4
This example shows how to change the behavior of the native VLAN on an 802.1Q trunked interface to
maintain the tagged packets and drop all untagged traffic (except control traffic):
switch# configure terminal
switch(config)# vlan dot1q tag native
switch(config-if)#

Verifying the Interface Configuration

Use one of the following commands to verify the access and trunk interface configuration information:
Command
show interface ethernet slot/port [ brief |
capabilities | counters | mac-address | status |
switchport | trunk]
interfaces on all trunks on the device.
Command or Action
switch# configure terminal
switch#(config) vlan dot1q tag
native
switch(config-if)# show vlan
switch(config-if)# copy
running-config startup-config
Cisco Nexus 1000V for VMware vSphere Interface Configuration Guide, Release 5.x

Verifying the Interface Configuration

Purpose
Enters global configuration mode.
Modifies the behavior of a 802.1Q trunked native VLAN ID
interface in the running configuration. The interface maintains
the taggings for all packets that enter with a tag that matches
the value of the native VLAN ID and drops all untagged
traffic. The control traffic is still carried on the native VLAN.
The default is disabled.
(Optional)
Displays the status and information of VLANs.
(Optional)
Saves the change persistently through reboots and restarts by
copying the running configuration to the startup configuration.
Purpose
Displays the interface configuration.
31