H3C Technologies H3C S7500E Series Switches - Manual (Page 289)

21-6
Configure the customer-side port as a hybrid port, and assign the port to SVLANs as an untagged
member. When the port forwards the packets from these SVLANs, it removes their SVLAN tag.
Figure 21-6 One-to-two VLAN mapping
Two-to-two VLAN mapping
Implement two-to-two VLAN mapping, as shown in Figure 21-7 .
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 21-7 Two-to-two VLAN mapping implementation
Network-side port Customer-side port Uplink traffic Downlink traffic
User network SP network
Outbound
downlink policy
SVLAN Data CVLAN
SVLAN Data CVLAN
Outbound
uplink policy
Inbound
uplink policy
Data CVLAN’ SVLAN’
Data CVLAN’ SVLAN’
Configuring VLAN Mapping
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 (see Figure 21-1 )
Configuring Many-to-One VLAN Mapping Campus switch (see Figure 21-1 )