3com S7906E Manuel De Montage

 

1-5 

 

Map all specified 
customer VLANs 
(CVLAN) to one 
service provider 
VLAN (SVLAN) 

Uplink policy in the 
inbound direction 

Replace the SVLAN 
with the original 
CVLAN 

DHCP snooping 
address table, which 
contains mappings of 
the SVLAN, IP 
address, MAC 
address, and CVLAN 
for DHCP clients 

 

Tag the 
CVLAN-tagged 
traffic with the 
SVLAN 

Uplink policy in the 
inbound direction 

Forward traffic with the 
outer VLAN tag (the 
SVLAN) removed 

You need to configure 
the downlink port as a 
hybrid port to forward 
SVLAN frames with the 
outer VLAN tag 
removed. 

 

 

In two-to-two VLAN mapping, the outer VLAN and the inner VLAN carried in a double-tagged uplink 

frame received at the downlink port on the edge device of an SP network are called the original SVLAN 

and CVLAN, and the VLANs that the edge device substitutes for the original SVLAN and CVLAN are 

called the new SVLAN and CVLAN.