H3C Technologies H3C S10500 Series Switches - Manual (Page 204)

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Figure 63 Application scenario of one-to-one and many-to-one VLAN mapping
VLAN 101 - 102 - > VLAN 501
VLAN 201 - 202 - > VLAN 502
VLAN 301 - 302 - > VLAN 503
...
Campus switch
Distribution
network
DHCP client
DHCP server
...
Wiring - closet
switch
VLAN 1 - > VLAN 101
VLAN 2 - > VLAN 201
VLAN 3 - > VLAN 301
VLAN 1 - > VLAN 102
VLAN 2 - > VLAN 202
VLAN 3 - > VLAN 302
PC
VoD
VoIP
VLAN 2
Home gateway
VLAN 1
VLAN 3
PC
VoD
VoIP
VLAN 2
Home gateway
VLAN 1
VLAN 3
Wiring-closet
switch
VLAN 1 - > VLAN 199
VLAN 2 - > VLAN 299
VLAN 3 - > VLAN 399
VLAN 1 -> VLAN 200
VLAN 2 -> VLAN 300
VLAN 3 -> VLAN 400
PC
VoD
VoIP
VLAN 2
Home gateway
VLAN 1
VLAN 3
PC
VoD
VoIP
VLAN 2
Home gateway
VLAN 1
VLAN 3
...
VLAN 199 - 200 - > VLAN 501
VLAN 299 - 300 - > VLAN 502
VLAN 399 - 400 - > VLAN 503
...
...
...
...
To further sub-classify each type of traffic by customer, perform one-to-one VLAN mapping on the
wiring-closet switches, and assign a separate VLAN for each type of traffic from each customer. The
required total number of VLANs in the network can be large. To prevent the maximum number of VLANs
from being exceeded on the distribution layer device, perform many-to-one VLAN mapping on the
campus switch to assign the same type of traffic from different customers to the same VLAN.
Application scenario of one-to-two and two-to-two VLAN
mapping
Figure 64 shows a typical application scenario in which two remote sites of VPN A, Site 1 and Site 2,
must communicate across two SP networks, SP 1 and SP 2.