Configuring Access And Trunk Interfaces; Configuring A Lan Interface As An Ethernet Access Port - Cisco Nexus 3000 Series Configuration Manual

Configuring Access and Trunk Interfaces

Cisco NX-OS Release 6.0(2)U2(1) introduces the tx-only option, which allows both tagged and untagged
packets at ingress. You can use the vlan dot1q tag native tx-only command to perform the following functions:
• On the ingress side, allow both tagged and untagged traffic.
• On the egress side, tag all traffic with the native vlan dot1q tag. For previously tagged frames, the existing
You can enable the vlan dot1q tag native command by entering the command in the global configuration
Note
mode.
Configuring Access and Trunk Interfaces

Configuring a LAN Interface as an Ethernet Access Port

You can configure an Ethernet interface as an access port. An access port transmits packets on only one,
untagged VLAN. You specify which VLAN traffic that the interface carries. If you do not specify a VLAN
for an access port, the interface carries traffic only on the default VLAN. The default VLAN is VLAN1.
The VLAN must exist before you can specify that VLAN as an access VLAN. The system shuts down an
access port that is assigned to an access VLAN that does not exist.
Procedure
Step 1
Step 2
Step 3
Step 4
This example shows how to set an interface as an Ethernet access port that carries traffic for a specific VLAN
only:
switch# configure terminal
switch(config)# interface ethernet 1/10
OL-29545-03
dot1q tag is preserved. Untagged frames are tagged with the native vlan dot1q tag.
Command or Action
switch# configure terminal
switch(config)# interface {{type
slot/port} | {port-channel
number}}
switch(config-if)# switchport
mode {access | trunk}
switch(config-if)# switchport
access vlan vlan-id
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 6.x
Configuring Access and Trunk Interfaces
Purpose
Enters global configuration mode.
Specifies an interface to configure, and enters interface
configuration mode.
Sets the interface as a nontrunking nontagged single-VLAN
Ethernet interface. An access port can carry traffic in one
VLAN only. By default, an access port carries traffic for
VLAN1; to set the access port to carry traffic for a different
VLAN, use the switchport access vlan command.
Specifies the VLAN for which this access port will carry
traffic. If you do not enter this command, the access port
carries traffic on VLAN1 only; use this command to change
the VLAN for which the access port carries traffic.
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