Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 142

Configuring LAN Interfaces for Layer 2 Switching
A port that is configured with a custom EtherType field value considers frames that have any other
Caution
EtherType field value to be untagged frames. A trunk port with a custom EtherType field value places
frames with any other EtherType field value into the native VLAN. An access port or tunnel port with a
custom EtherType field value places frames that are tagged with any other EtherType field value into the
access VLAN. If you misconfigure a custom EtherType field value, frames might be placed into the
wrong VLAN.
See the
•
the modules that support custom IEEE 802.1Q EtherType field values.
This example shows how to configure the EtherType field value to 0x1234:
Router (config-if)# switchport dot1q ethertype 1234
Router (config-if)#
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
8-16
Release Notes for Cisco IOS Release 12.2ZY on the Supervisor Engine 32 PISA
Chapter 8 Configuring LAN Ports for Layer 2 Switching
for a list of
OL-11439-03