3com 5500-ei pwr Installation Instruction
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# Configure the destination MAC address for the packets transmitted in the tunnel.
[Sysname-Ethernet1/0/4] quit
[Sysname] bpdu-tunnel tunnel-dmac 010f-e233-8b22
# Configure Ethernet1/0/3 as a trunk port that permits packets of all VLANs.
[Sysname] interface Ethernet 1/0/3
[Sysname-Ethernet1/0/3] port link-type trunk
[Sysname-Ethernet1/0/3] port trunk permit vlan all