Configuring Ieee 802.1Q Tunneling - Planet SGSD-1022 User Manual

5.21.5 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.
Command
dot1q-tunnelsystem-tunnel-cont
rol
switchport dot1q-tunnel mode
switchport dot1q-tunnel tpid
show dot1q-tunnel
show interfaces switchport
General Configuration Guidelines for QinQ
1. Configure the switch to QinQ mode
2. Create a SPVLAN (vlan).
3. Configure the QinQ tunnel access port to dot1Q-tunnel access mode
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
dot1q-tunnel tpid.)
5. Configure the QinQ tunnel access port to join the SPVLAN as an untagged member
6. Configure the SPVLAN ID as the native VID on the QinQ tunnel access port
7. Configure the QinQ tunnel uplink port to dot1Q-tunnel uplink mode
8. Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged member
Limitations for QinQ
The native VLAN for the tunnel uplink ports and tunnel access ports cannot be the same. However, the same service VLANs
can be set on both tunnel port types.
IGMP Snooping should not be enabled on an tunnel access port.
If the spanning tree protocol is enabled, be aware that a tunnel access or tunnel uplink port may be disabled if the spanning
tree structure is automatically
reconfigured to overcome a break in the tree. It is therefore advisable to disable spanning tree on these ports.
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
Table 5-71 IEEE 802.1Q Tunneling Commands
(dot1q-tunnel system-tunnel-control).
576
User's Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
(switchport dot1q-tunnel
(switchport allowed
(switchport native
(switchport dot1q-tunnel
(switchport allowed
Mode
GC
IC
IC
PE
PE
mode).
switchport
vlan).
vlan).
mode).
vlan).