H3C S6850 Series Configuration Guide

4
Figure 3 Basic VLAN mapping terms
One-to-one VLAN mapping
As shown in Figure 4, one-to-one VLAN mapping is implemented on the customer-side port and
replaces VLAN tags as follows:
• Replaces the CVLAN with the SVLAN for the uplink traffic.
• Replaces the SVLAN with the CVLAN for the downlink traffic.
Figure 4 One-to-one VLAN mapping implementation
Many-to-one VLAN mapping
As shown in Figure 5, many-to-one VLAN mapping is implemented on both the customer-side and
network-side ports as follows:
• For the uplink traffic, the customer-side many-to-one VLAN mapping replaces multiple CVLANs
with the same SVLAN.
• For the downlink traffic, the network-side many-to-one VLAN mapping replaces the SVLAN with
the CVLAN found in the DHCP snooping table or ARP snooping table. For more information
about DHCP snooping and ARP snooping, see Layer 3—IP Services Configuration Guide.
SP
Network-side port
Customer-side port
Uplink traffic
Downlink traffic

H3C S6850 Series Specifications

General

Brand	H3C
Model	S6850 Series
Category	Switch
Language	English