H3C S12500X-AF Series, Configuration Manual

Page: 162 / 224

151
Figure 56 One-to-two VLAN mapping implementation
Zero-to-two VLAN mapping
As shown in Figure 57 , zero-to-two VLAN mapping is implemented on the customer-side port and
processes VLAN tags as follows:
•
Adds double tags to untagged uplink traffic.
•
Removes SVLAN tags and CVLAN tags from downlink traffic.
To ensure correct transmission of downlink traffic, use one of the following methods to sustain the
SVLAN tag in the downlink traffic:
•
Configure the customer-side port as a trunk port and assign it to the SVLAN. Make sure the
SVLAN is not the PVID.
•
Configure the customer-side port as a hybrid port and assign it to the SVLAN as a tagged
member.
Figure 57 Zero-to-two VLAN mapping implementation
Two-to-two VLAN mapping
As shown in Figure 58 , two-to-two VLAN mapping is implemented on the customer-side port and
replaces VLAN tags as follows:
•
Replaces the CVLAN and the SVLAN with the CVLAN' and the SVLAN' for the uplink traffic.
•
Replaces the SVLAN' and CVLAN' with the SVLAN and the CVLAN for the downlink traffic.