HP 5820X Series

178
VLAN mapping configuration
VLAN mapping re-marks VLAN tagged traffic with new VLAN IDs. HP 5800&5820X series provides the
following types of VLAN mapping:
• One-to-one VLAN mapping—Replaces one VLAN tag with another. Use one-to-one VLAN mapping
to sub-classify traffic from a particular VLAN for granular QoS control.
• Many-to-one VLAN mapping—Replaces multiple VLAN tags with the same VLAN tag. Use many-to-
one VLAN mapping to aggregate traffic from different VLANs to regulate the aggregate traffic as a
whole. Many-to-one VLAN mapping is usually used together with one-to-one VLAN mapping.
• Two-to-two VLAN mapping—Replaces the outer and inner VLAN IDs of double tagged traffic with a
new pair of VLAN IDs. Use two-to-two VLAN mapping to enable two remote sites in different VLANs
to communicate at Layer 2 across two service provider networks that use different VLAN assignment
schemes.
Application scenario of one-to-one and many-to-one VLAN
mapping
Figure 58 shows a typical application scenario in which each home gateway uses different VLANs to
transmit the PC, VoD, and VoIP services.