H3C S3600V2 SERIES, Layer 2-Lan Switching Configuration Manual

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Figure 72 Many-to-one VLAN mapping implementation
Each DHCP snooping entry contains information about one DHCP client, including its IP address, MAC
address, and CVLAN. For more information about DHCP snooping, see Layer 3—IP Services
Configuration Guide .
Two-to-two VLAN mapping
Implement two-to-two VLAN mapping through the following configurations, as shown in Figure 73 .
•
For uplink traffic, apply an inbound policy on the customer-side port to replace the SVLAN with a
new SVLAN, and apply an outbound policy on the network-side port to replace the CVLAN with a
new CVLAN.
•
For downlink traffic, apply an outbound policy on the customer-side port to replace the double tags
with the original VLAN tag pair.
Figure 73 Two-to-two VLAN mapping implementation
VLAN mapping configuration tasks
Use the VLAN mapping methods as appropriate to the roles of your switches in the network, as described
in this table:
Task Switch role
Configuring one-to-one VLAN mapping Wiring-closet switch
Configuring many-to-one VLAN mapping Campus switch
Configuring two-to-two VLAN mapping Edge switch between SP networks
Network-side port Customer-side port Uplink traffic Downlink traffic
SP network
Outbound
downlink policy
SVLAN Data CVLAN
SVLAN Data CVLAN
Outbound
uplink policy
Inbound
uplink policy
Data CVLAN’ SVLAN’
Data CVLAN’ SVLAN’
Customer
network