Alcatel Carrier Internetworking Solutions Switch/Router 用户手册

Page 16-3

The following diagram illustrates a simple 

802.1Q

 application:

In the above diagram, the PC devices (endstations) need to be segmented into different 

802.1Q VLANs

. The switch port to which each device attaches is assigned to an 802.1Q group 

(Group 2 for endstations A, B, E, and F, and Group 3 for endstations C, D, G, and H).

The ports connecting Switch X and Switch Y are also added to 802.1Q groups 2 and 3. All of 
the switch ports that handle 802.1Q traffic are now capable of passing 802.1Q information.

Prior to Release 4.4, only Mammoth ASIC-based Ethernet, Fast Ethernet and Gigabit Ethernet 
modules could be part of an 

802.1Q

 group. For Release 4.4 and later, Kodiak ASIC-based 10/

100, Fast Ethernet and Gigabit Ethernet modules also support 

802.1Q

 groups. In either config-

uration, existing policies for a group will not be affected by the group’s support for 

802.1Q

.

♦ Important Note ♦

Kodiak ASIC-based 10/100 Ethernet modules support 

802.1Q

 traffic over OmniChannel in multiple spanning 

tree mode. However, for 

802.1Q

 support over 

OmniChannel, you must first create an OmniChannel 
before creating 

802.1Q groups

. See Chapter 15 for infor-

mation about OmniChannel. For information on the 
differences between single and multiple spanning tree, 
see Single vs. Multiple Spanning Tree on page 16-4.

By matching switch ports with 

802.1Q

 groups, you are statically assigning the port to the 

group. Once assigned, an 

802.1Q

 port cannot be dynamically assigned to another group. 

However, the same switch port can be statically assigned to more than one 

802.1Q

 group.

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