SMC Networks SMC8150L2 manual Configuring Ieee 802.1Q Tunneling, Configuring VLANs per Port

Configuring IEEE 802.1Q Tunneling 3

Web – Click VLAN, 802.1Q VLAN, Port Configuration or Trunk Configuration. Fill in the required settings for each interface, click Apply.

Figure 3-77 Configuring VLANs per Port

CLI – This example sets port 3 to accept only tagged frames, assigns PVID 3 as the native VLAN ID, and then sets the switchport mode to hybrid.

Console(config)#interface ethernet 1/3	4-116
Console(config-if)#switchport acceptable-frame-types tagged	4-171
Console(config-if)#switchport ingress-filtering	4-171
Console(config-if)#switchport native vlan 3	4-172
Console(config-if)#switchport mode hybrid	4-170
Console(config-if)#

Configuring IEEE 802.1Q Tunneling

IEEE 802.1Q Tunneling (QinQ) is designed for service providers carrying traffic for multiple customers across their networks. QinQ tunneling is used to maintain customer-specific VLAN and Layer 2 protocol configurations even when different customers use the same internal VLAN IDs. This is accomplished by inserting Service Provider VLAN (SPVLAN) tags into the customer’s frames when they enter the service provider’s network, and then stripping the tags when the frames leave the network.

A service provider’s customers may have specific requirements for their internal VLAN IDs and number of VLANs supported. VLAN ranges required by different customers in the same service-provider network might easily overlap, and traffic passing through the infrastructure might be mixed. Assigning a unique range of VLAN IDs to each customer would restrict customer configurations, require intensive processing of VLAN mapping tables, and could easily exceed the maximum VLAN limit of 4096.

QinQ tunneling uses a single Service Provider VLAN (SPVLAN) for customers who have multiple VLANs. Customer VLAN IDs are preserved and traffic from different customers is segregated within the service provider’s network even when they use the same customer-specific VLAN IDs. QinQ tunneling expands VLAN space by

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