Double Tagging Operation; Double Tagging Configuration - SMC Networks 7824M/VSW - annexe 1 Manual

CLI
8.1.9.1
8.1.9.2
242
The different customer VLANs existing in the traffic to a tunnel port shall be preserved
when the traffic is carried across the network
Trunk Port
By trunk port we mean a LAN port that is configured to operate as an inter-switch link/port,
able of carrying double-tagged traffic. A trunk port is always connected to another trunk
port on a different switch. Switching shall be performed between trunk ports and tunnels
ports and between different trunk ports.

Double Tagging Operation

Step 1
If there is no SPVLAN Tag on received packet, SPVLAN Tag is added.
SPVLAN Tag = TPID : Configured TPID
VID : PVID of input port
Step 2
If received packet is tagged with CVLAN, the switch transmits it to uplink port changing to
SPVLAN + CVLAN. When TPID value of received packet is same with TPID of port, it
recognizes as SPVLAN, and if not as CVLAN.
Step 3
If Egress port is Access port (Access port is configured as Untagged), remove SPVLAN. If
egress port is uplink port, transmit as it is.
Step 4
The switch switch has 0x8100 TPID value as default and other values are used as hexa-
decimal number.

Double Tagging Configuration

Step 1
Designate the QinQ port.
Command
vlan dot1q-tunnel enable PORTS
Step 2
Configure the same PVID with the VLAN of peer network on the designated qinq port.
Command
vlan pvid PORTS <1-4094>
Mode
Configures a qinq port.
Bridge
PORTS: qinq port to be enabled
Mode
Configures a qinq port.
Bridge PORTS: qinq port to be enabled
1-4094: PVID
Management Guide
TigerAccess™ EE
Description
Description
SMC7824M/VSW