H3C Technologies H3C S12500-X Series Switches - Manual (Page 153)

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Figure 42 Basic concepts of VLAN mapping
One-to-one VLAN mapping
Figure 43 One-to-one VLAN mapping implementation
In Figure 43 , after you configure one-to-one VLAN mapping on the customer-side port, the device
replaces the CVLAN with the SVLAN for the uplink traffic and replaces the SVLAN with the CVLAN for
the downlink traffic.
One-to-two VLAN mapping
Figure 44 One-to-two VLAN mapping implementation
In Figure 44 , one-to-two VLAN mapping is implemented as follows:
SP
Network-side port
Customer-side port
Uplink traffic
Downlink traffic
Customer
network
SP network
Data CVLAN
Data CVLAN
One-to-two VLAN
mapping
Strip the outer VLAN tag of packets
from SVLANs
SVLAN Data CVLAN
SVLAN Data CVLAN
Network-side port Customer-side port Uplink traffic Downlink traffic