3Com 4510G Configuration Manual page 185

As third-party devices are deployed between Provider A and Provider B, what we discuss here is only
the basic configuration that should be made on the devices. Configure that device connecting with
GigabitEthernet 1/0/3 of Provider A and the device connecting with GigabitEthernet 1/0/1 of Provider B
so that their corresponding ports send tagged frames of VLAN 1000, VLAN 2000 and VLAN 3000. The
configuration steps are omitted here.
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