Vlan Mapping Implementations - HP 5820X series Configuration Manual

Uplink traffic: Traffic transmitted from the customer network to the service provider network.
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Downlink traffic: Traffic transmitted from the service provider network to the customer network.
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Network-side port: A port connected to the service provider network.
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Customer-side port: A port connected to the customer network.
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Uplink policy: A QoS policy that defines VLAN mapping rules for uplink traffic.
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Downlink policy: A QoS policy that defines VLAN mapping rules for downlink traffic.
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CVLANs: VLANs assigned for customers.
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SVLANs: VLANs assigned for transmitting traffic across the service provider network.
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For more information about QoS policies, see the 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.
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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 the corresponding
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CVLAN ID. When forwarding a packet out of the port, the switch replaces its SVLAN ID with the
matching CVLAN ID.
Figure 61 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
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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
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looks through the DHCP snooping table, and replaces the SVLAN ID with the CVLAN ID found in
the table.
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Figure 62: