SMC Networks SMC8150L2 Configuring Ieee 802.1Q Tunneling, Dot1q-tunnel system-tunnel-control

4 Command Line Interface

Configuring IEEE 802.1Q Tunneling

IEEE 802.1Q tunneling (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 using a VLAN-in-VLAN hierarchy, preserving the customer’s original tagged packets, and adding SPVLAN tags to each frame (also called double tagging).

This section describes commands used to configure QinQ tunneling.

Table 4-58 IEEE 802.1Q Tunneling Commands

Command	Function	Mode	Page
dot1q-tunnel	Configures the switch to operate in normal mode or QinQ	GC	4-176
system-tunnel-control	mode
switchport dot1q-tunnel	Configures an interface as a QinQ tunnel port	IC	4-177
mode
switchport dot1q-tunnel tpid	Sets the Tag Protocol Identifier (TPID) value of a tunnel port	IC	4-178
show dot1q-tunnel	Displays the configuration of QinQ tunnel ports	PE	4-178
show interfaces switchport	Displays port QinQ operational status	PE	4-125

General Configuration Guidelines for QinQ

1.Configure the switch to QinQ mode (dot1q-tunnelsystem-tunnel-control, page 4-176).

2.Create a SPVLAN (vlan, page 4-168).

3.Configure the QinQ tunnel access port to dot1Q-tunnel access mode (switchport dot1q-tunnel mode, page 4-177).

4.Set the Tag Protocol Identifier (TPID) value of the tunnel access port. This step is required if the attached client is using a nonstandard 2-byte ethertype to identify 802.1Q tagged frames. The standard ethertype value is 0x8100. (See switchport dot1q-tunnel tpid, page 4-178.)

5.Configure the QinQ tunnel access port to join the SPVLAN as an untagged member (switchport allowed vlan, page 4-173).

6.Configure the SPVLAN ID as the native VID on the QinQ tunnel access port (switchport native vlan, page 4-172).

7.Configure the QinQ tunnel uplink port to dot1Q-tunnel uplink mode (switchport dot1q-tunnel mode, page 4-177).

8.Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged member (switchport allowed vlan, page 4-173).

dot1q-tunnel system-tunnel-control

This command sets the switch to operate in QinQ mode. Use the no form to disable QinQ operating mode.

Syntax

[no] dot1q-tunnel system-tunnel-control

4-176