Cisco Systems EA6500 Manual De Usuario

With Release 12.1(13)E and later, the Catalyst 6500 series switches support IEEE 802.1Q tunneling and 
Layer 2 protocol tunneling. This chapter describes how to configure IEEE 802.1Q tunneling and Layer 
2 protocol tunneling on the Catalyst 6500 series switches.

For complete syntax and usage information for the commands used in this chapter, refer to the 
Catalyst 6500 Series Switch Cisco IOS Command Reference publication. 

The WS-X6548-GE-TX, WS-X6548V-GE-TX, WS-X6148-GE-TX, and WS-X6148V-GE-TX 
switching modules do not support IEEE 802.1Q tunneling or Layer 2 protocol tunneling.

This chapter consists of these sections:

802.1Q tunneling enables service providers to use a single VLAN to support customers who have 
multiple VLANs, while preserving customer VLAN IDs and keeping traffic in different customer 
VLANs segregated. 

A port configured to support 802.1Q tunneling is called a tunnel port. When you configure tunneling, 
you assign a tunnel port to a VLAN that you dedicate to tunneling, which then becomes a tunnel VLAN. 
To keep customer traffic segregated, each customer requires a separate tunnel VLAN, but that one tunnel 
VLAN supports all of the customer’s VLANs.

802.1Q tunneling is not restricted to point-to-point tunnel configurations. Any tunnel port in a tunnel 
VLAN is a tunnel entry and exit point. An 802.1Q tunnel can have as many tunnel ports as are needed 
to connect customer switches.