3com S7906E Manuel De Montage

 

1-2 

 

Figure 1-1 Scenario for one-to-one/multiple-to-one VLAN mapping 

 

PC

VoD

VoIP

VLAN 1

VLAN 2

VLAN 3

PC

VoD

VoIP

VLAN 1

VLAN 2

VLAN 3

PC

VoD

VoIP

VLAN 1

VLAN 2

VLAN 3

PC

VoD

VoIP

VLAN 1

VLAN 2

VLAN 3

…
…

VLAN 1-> VLAN 101
VLAN 2-> VLAN 201
VLAN 3-> VLAN 301

VLAN 1-> VLAN 102
VLAN 2-> VLAN 202
VLAN 3-> VLAN 302

VLAN 101~200-> VLAN 501
VLAN 201~300-> VLAN 502
VLAN 301~400-> VLAN 503

VLAN 1-> VLAN 111
VLAN 2-> VLAN 211
VLAN 3-> VLAN 311

VLAN 1-> VLAN 112
VLAN 2-> VLAN 212
VLAN 3-> VLAN 312

VLAN 111~210-> VLAN 501
VLAN 211~310-> VLAN 502
VLAN 311~410-> VLAN 503

Distribution 

network

…
…

…
…

 

 

To differentiate home users that are using the same service, you need to perform one-to-one VLAN 

mapping to map the service traffic to different VLANs by user on the corridor switches. However, an 

access device on the distribution layer is likely unable to support the number of VLANs required for this 

type of VLAN mapping. To reduce the number of VLANs required on the edge device at the distribution 

layer, you can adopt many-to-one VLAN mapping. This type of VLAN mapping maps the VLANs 

carrying the same service of different users to the same VLAN while isolating the service traffic of 

different users. 

One-to-two VLAN mapping and two-to-two VLAN mapping are mainly applied in networking 

environments as shown in 

, two VPN A users located in different regions (Site 1 

and Site 2) communicate with each other across two service provider (SP) networks, that is, SP 1 and 

SP 2.