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General Configuration Guidelines for QinQ
1. Configure the switch to QinQ mode (dot1q-tunnel system-tunnel-control,
page 34-15).
2. Create a SPVLAN (vlan, page 34-6).
3. Configure the QinQ tunnel access port to dot1Q-tunnel access mode
(
switchport dot1q-tunnel mode
, page 34-15).
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 34-16.)
5. Configure the QinQ tunnel access port to join the SPVLAN as an untagged
member (
switchport allowed vlan
, page 34-11).
6. Configure the SPVLAN ID as the native VID on the QinQ tunnel access port
(
switchport native vlan
, page 34-10).
7. Configure the QinQ tunnel uplink port to dot1Q-tunnel uplink mode (switchport
dot1q-tunnel mode
, page 34-15).
8. Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged member
(
switchport allowed vlan
, page 34-11).
34-14
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 34-6 IEEE 802.1Q Tunneling Commands
Command
dot1q-tunnel
system-tunnel-control
switchport dot1q-tunnel
mode
switchport dot1q-tunnel tpid
show dot1q-tunnel
show interfaces switchport
Function
Configures the switch to operate in normal mode or QinQ
mode
Configures an interface as a QinQ tunnel port
Sets the Tag Protocol Identifier (TPID) value of a tunnel port
Displays the configuration of QinQ tunnel ports
Displays port QinQ operational status
Mode Page
GC 34-15
IC 34-15
IC 34-16
PE 34-17
PE 27-11
VLAN Commands
34