3Com 4500 Configuration Manual page 451

# Configure VLAN mapping on Ethernet 1/0/11 to replace VLAN tag 100 with VLAN tag 500.
[SwitchA] interface Ethernet 1/0/11
[SwitchA-Ethernet1/0/11] traffic-remark-vlanid inbound link-group 4000 remark-vlan 500
[SwitchA-Ethernet1/0/11] quit
# Configure VLAN mapping on Ethernet 1/0/12 to replace VLAN tag 200 with VLAN tag 600.
[SwitchA] interface Ethernet 1/0/12
[SwitchA-Ethernet1/0/12] traffic-remark-vlanid inbound link-group 4001 remark-vlan 600
[SwitchA-Ethernet1/0/12] quit
# Configure VLAN mapping on Ethernet 1/0/10 to replace VLAN tag 500 with VLAN tag 100 and replace
VLAN tag 600 with VLAN tag 200.
[SwitchA] interface Ethernet 1/0/10
[SwitchA-Ethernet1/0/10] traffic-remark-vlanid inbound link-group 4002 remark-vlan 100
[SwitchA-Ethernet1/0/10] traffic-remark-vlanid inbound link-group 4003 remark-vlan 200
[SwitchA-Ethernet1/0/10] quit
Define the same VLAN mapping rules on Switch B. The detailed configuration procedure is similar to
that of Switch A and thus is omitted here.
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