H3C S6850 Series Configuration Manual page 255

[SwitchC-Twenty-FiveGigE1/0/2] port trunk permit vlan 103 104 203 204 303 304 501 to
503
# Configure many-to-one VLAN mappings on Twenty-FiveGigE 1/0/2 to map VLANs for PC,
VoD, and VoIP traffic to VLANs 501, 502, and 503, respectively.
[SwitchC-Twenty-FiveGigE1/0/2] vlan mapping uni range 103 to 104 translated-vlan 501
[SwitchC-Twenty-FiveGigE1/0/2] vlan mapping uni range 203 to 204 translated-vlan 502
[SwitchC-Twenty-FiveGigE1/0/2] vlan mapping uni range 303 to 304 translated-vlan 503
# Enable recording of client information in DHCP snooping entries on Twenty-FiveGigE 1/0/2.
[SwitchC-Twenty-FiveGigE1/0/2] dhcp snooping binding record
[SwitchC-Twenty-FiveGigE1/0/2] quit
# Configure the network-side port (Twenty-FiveGigE 1/0/3) to use the original VLAN tags of the
many-to-one mappings to replace the VLAN tags of the packets destined for the user network.
[SwitchC] interface twenty-fivegige 1/0/3
[SwitchC-Twenty-FiveGigE1/0/3] vlan mapping nni
# Configure Twenty-FiveGigE 1/0/3 as a trunk port.
[SwitchC-Twenty-FiveGigE1/0/3] port link-type trunk
# Assign Twenty-FiveGigE 1/0/3 to the translated VLANs.
[SwitchC-Twenty-FiveGigE1/0/3] port trunk permit vlan 501 to 503
# Configure Twenty-FiveGigE 1/0/3 as a DHCP snooping trusted and ARP trusted port.
[SwitchC-Twenty-FiveGigE1/0/3] dhcp snooping trust
[SwitchC-Twenty-FiveGigE1/0/3] arp detection trust
[SwitchC-Twenty-FiveGigE1/0/3] quit
4. Configure Switch D:
# Create the translated VLANs.
<SwitchD> system-view
[SwitchD] vlan 501 to 503
# Configure Twenty-FiveGigE 1/0/1 as a trunk port.
<SwitchD> system-view
[SwitchD] interface twenty-fivegige 1/0/1
[SwitchD-Twenty-FiveGigE1/0/1] port link-type trunk
# Assign Twenty-FiveGigE 1/0/1 to the translated VLANs.
[SwitchD-Twenty-FiveGigE1/0/1] port trunk permit vlan 501 to 503
[SwitchD-Twenty-FiveGigE1/0/1] quit
Verifying the configuration
# Verify VLAN mapping information on the wiring-closet switches, for example, Switch A.
[SwitchA] display vlan mapping
Interface Twenty-FiveGigE1/0/1:
Outer VLAN
1
2
3
Interface Twenty-FiveGigE1/0/2:
Outer VLAN
1
2
3
# Verify VLAN mapping information on Switch C.
Inner VLAN Translated Outer VLAN
N/A 101
N/A 201
N/A 301
Inner VLAN Translated Outer VLAN
N/A 102
N/A 202
N/A 302
Translated Inner VLAN
N/A
N/A
N/A
Translated Inner VLAN
N/A
N/A
N/A
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