Vlan Mapping Implementations - H3C S3600V2 SERIES Layer 2-Lan Switching Configuration Manual

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

This section describes how VLAN mapping is implemented on your device.
One-to-one VLAN mapping
Implement one-to-one VLAN mapping on the customer-side port through the following configurations, as
shown in Figure
Apply an uplink policy to the 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 the 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.
Figure 71 One-to-one VLAN mapping implementation
Many-to-one VLAN mapping
Implement many-to-one VLAN mapping through the following configurations, as shown in
• Apply an uplink policy to the incoming traffic on the customer-side port to map different CVLAN IDs
to one SVLAN ID. When a packet arrives, the switch replaces its CVLAN tag with the matching
SVLAN tag.
Configure the network-side port as a DHCP snooping trusted port. For downlink traffic, the switch
•
looks through the DHCP snooping table, and replaces the SVLAN ID with the CVLAN ID found in
the table.
71:
205
Figure 72: