LevelOne GTL-2691 - Manual (Page 220)

C HAPTER 6 | VLAN Configuration
IEEE 802.1Q Tunneling
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Figure 79: Enabling QinQ Tunneling
C REATING CVLAN TO
SPVLAN M APPING
E NTRIES
Use the VLAN > Tunnel (Configure Service) page to create a CVLAN to
SPVLAN mapping entry.
CLI R EFERENCES
◆ "switchport dot1q-tunnel service match cvid" on page 1126
C OMMAND U SAGE
◆ The inner VLAN tag of a customer packet entering the edge router of a
service provider’s network is mapped to an outer tag indicating the
service provider VLAN that will carry this traffic across the 802.1Q
tunnel. By default, the outer tag is based on the default VID of the edge
router’s ingress port. This process is performed in a transparent
manner as described under "IEEE 802.1Q Tunneling" on page 215 .
◆ When priority bits are found in the inner tag, these are also copied to
the outer tag. This allows the service provider to differentiate service
based on the indicated priority and appropriate methods of queue
management at intermediate nodes across the tunnel.
◆ Rather than relying on standard service paths and priority queuing,
QinQ VLAN mapping can be used to further enhance service by defining
a set of differentiated service pathways to follow across the service
provider’s network for traffic arriving from specified inbound customer
VLANs.
◆ Note that all customer interfaces should be configured as access
interfaces (that is, a user-to-network interface) and service provider
interfaces as uplink interfaces (that is, a network-to-network interface).
Use the Configure Interface page described in the next section to set an
interface to access or uplink mode.