R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

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Figure 67 Basic concepts of VLAN mapping
These basic concepts include:
• Uplink traffic—Traffic transmitted from the customer network to the service provider network.
• Downlink traffic—Traffic transmitted from the service provider network to the customer network.
• Network-side port—A port connected to or closer to the service provider network.
• Customer-side port—A port connected to or closer to the customer network.
• Uplink policy—A QoS policy that defines VLAN mapping rules for uplink traffic.
• Downlink policy—A QoS policy that defines VLAN mapping rules for downlink traffic.
• Customer VLANs (CVLANs)—VLANs assigned for customers.
• Service provider VLANs (SVLANs)—VLANs assigned for transmitting traffic across the service
provider network.
For more information about QoS policies, see ACL and QoS Configuration Guide.
VLAN mapping implementations
One-to-one VLAN mapping
Implement one-to-one VLAN mapping on the customer-side port through the following configurations, as
shown in Figure 68:
• A
pply an uplink policy to incoming traffic, mapping each CVLAN ID to a unique SVLAN ID. When
a packet arrives, the switch replaces its CVLAN ID with the matching SVLAN ID.
• Apply a downlink policy to outgoing traffic, mapping each SVLAN ID back to its corresponding
CVLAN ID. When forwarding a packet out of the port, the switch replaces its SVLAN ID with the
matching CVLAN ID.
SP
Network-side port
Customer-side port
Uplink traffic
Downlink traffic