HP 6600 Configuration Manual page 191

Figure 67 One-to-one VLAN mapping implementation
Many-to-one VLAN mapping
Implement many-to-one VLAN mapping through the following configurations, as shown in
Apply an uplink policy to incoming traffic on the customer-side port to map different CVLAN IDs to
•
one SVLAN ID. When a packet arrives, the switch replaces its CVLAN tag with the matching SVLAN
tag.
• Configure the network-side port as a DHCP snooping trusted port. For downlink traffic, the switch
looks through the DHCP snooping table, and replaces the SVLAN ID with the CVLAN ID found in
the table.
Figure 68 Many-to-one VLAN mapping implementation
Customer
network
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.
One-to-two VLAN mapping
Implement one-to-two VLAN mapping through the following configurations, as shown in
• Apply an uplink policy to incoming traffic on the customer-side port to tag incoming packets from a
certain CVLAN with an outer SVLAN tag.
Configure the customer-side port as a hybrid port, and assign the port to SVLANs as an untagged
•
member. When the port forwards packets from these SVLANs, it removes their SVLAN tag.
CVLAN 1 Data
CVLAN n Data
CVLAN Data
Network-side Customer-side
port
Inbound
uplink policy
DHCP snooping table lookup
Uplink traffic
port
182
SVLAN Data
SVLAN Data
SVLAN Data
Downlink traffic
Figure 68:
SP network
Figure 69: