
Dynamix UM-SE G.SHDSL.bis EFM Bridge Modem User Manual V003
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On devices of different vendors, the TPID of the outer VLAN tag of QinQ frames may have
different default values. You can set or modify this TPID value, so that the QinQ frames, when
arriving at the public network, carries the TPID value of a specific vendor to allow
interoperation with devices of that vendor.
The TPID in an Ethernet frame has the same position with the protocol type field in a frame
without a VLAN tag. To avoid chaotic packet forwarding and receiving, you cannot set the
TPID value to any of the values in the table below.
Reserved protocol type values:
Protocol type
Value
ARP 0x0806
PUP 0x0200
RARP 0x8035
IP 0x0800
IPv6 0x86DD
PPPoE 0x8863/0x8864
MPLS 0x8847/0x8848
IPX/SPX 0x8137
IS-IS 0x8000
LACP 0x8809
802.1x 0x888E
Cluster 0x88A7
Reserved 0xFFFD/0xFFFE/0xFFFF