H3C S6850-56HF

15
Procedure
1. Configure Switch A:
# Create the original VLANs.
<SwitchA> system-view
[SwitchA] vlan 2 to 3
# Create the translated VLANs.
[SwitchA] vlan 101 to 102
[SwitchA] vlan 201 to 202
[SwitchA] vlan 301 to 302
# Configure customer-side port Twenty-FiveGigE 1/0/1 as a trunk port.
<SwitchA> system-view
[SwitchA] interface twenty-fivegige 1/0/1
[SwitchA-Twenty-FiveGigE1/0/1] port link-type trunk
# Assign Twenty-FiveGigE 1/0/1 to all original VLANs and translated VLANs.
[SwitchA-Twenty-FiveGigE1/0/1] port trunk permit vlan 1 2 3 101 201 301
# Configure one-to-one VLAN mappings on Twenty-FiveGigE 1/0/1 to map VLANs 1, 2, and 3
to VLANs 101, 201, and 301, respectively.
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 1 translated-vlan 101
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 2 translated-vlan 201
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 3 translated-vlan 301
[SwitchA-Twenty-FiveGigE1/0/1] quit
# Configure customer-side port Twenty-FiveGigE 1/0/2 as a trunk port.
[SwitchA] interface twenty-fivegige 1/0/2
[SwitchA-Twenty-FiveGigE1/0/2] port link-type trunk
# Assign Twenty-FiveGigE 1/0/2 to all original VLANs and translated VLANs.
[SwitchA-Twenty-FiveGigE1/0/2] port trunk permit vlan 1 2 3 102 202 302
# Configure one-to-one VLAN mappings on Twenty-FiveGigE 1/0/2 to map VLANs 1, 2, and 3
to VLANs 102, 202, and 302, respectively.
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 1 translated-vlan 102
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 2 translated-vlan 202
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 3 translated-vlan 302
[SwitchA-Twenty-FiveGigE1/0/2] quit
# Configure the network-side port (Twenty-FiveGigE 1/0/3) as a trunk port.
[SwitchA] interface twenty-fivegige 1/0/3
[SwitchA-Twenty-FiveGigE1/0/3] port link-type trunk
# Assign Twenty-FiveGigE 1/0/3 to the translated VLANs.
[SwitchA-Twenty-FiveGigE1/0/3] port trunk permit vlan 101 201 301 102 202 302
[SwitchA-Twenty-FiveGigE1/0/3] quit
2. Configure Switch B in the same way Switch A is configured. (Details not shown.)
3. Configure Switch C:
# Enable DHCP snooping.
<SwitchC> system-view
[SwitchC] dhcp snooping enable
# Create the original VLANs and translated VLANs, and enable ARP detection for these
VLANs.
[SwitchC] vlan 101
[SwitchC-vlan101] arp detection enable