7.2.3.3.1 Port-Based Q-In-Q - WAGO 852-1305 Manual

74 Enhanced Features
VLAN Stacking Port Roles
For "VLAN Stacking", each port can have one of three "roles": Normal, "Access
Port" or "Tunnel Port".
• Select "normal" for normal (no "VLAN Stacking") IEEE 802.1Q frame
switching.
• Select "Access Port" for ingress ports on PE devices of the service provider.
The incoming frame is treated as "untagged", so a second VLAN tag (outer
VLAN tag) can be added.
• Select "Tunnel Port" for egress ports in the PE range of the provider's
network. All VLANs belonging to a customer can be aggregated into a
single service provider's VLAN (using the outer VLAN tag defined by SP
VID).
Q-in-Q Configuration
For the double-tagged frames to switch correctly, users have to configure a
service provider's VLAN (SPVLAN) on the Q-in-Q switch. Then, the double-
tagged frames can be switched according to the SP VID. The SPVLAN should
include all related "Tunnels" and "Access Ports". In addition, the "Tunnel Ports"
must be configured as tagged ports and the "Access Ports" as untagged ports.

7.2.3.3.1 Port-Based Q-in-Q

Q-in-Q encapsulation can be used to convert a single-tagged 802.1Q packet into a
double-tagged Q-in-Q packet. The Q-in-Q encapsulation can be based on port or
traffic. Port-based Q-in-Q can be used to encapsulate all incoming packets to a
port with the same SPVID outer tag. This mode is less flexible.
In the following example figure, both X and Y are Service Provider's Network
(SPN) customers with VPN tunnels between their head offices and branch offices
respectively. Both have an identical VLAN tag for their VLAN group. The service
provider can separate these two VLANs within its network by adding tag 100 to
distinguish customer X and tag 200 to distinguish customer Y at PE device A and
then stripping those tags at PE device B as the data frames leave the network.
WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Manual
1.1.0