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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R012C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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TPID

TPID

The Tag Protocol Identifier (TPID) specifies the protocol type of a VLAN tag. The TPID value defined in IEEE 802.1Q is 0x8100.

Figure 10-5 shows the Ethernet packet format defined in IEEE 802.1Q. An IEEE 802.1Q tag, containing the TPID, is located between the Source Address field and the Length/Type field. The device checks the TPID value in a received frame to determine whether the VLAN tag is a service VLAN (S-VLAN) tag or customer (C-VLAN) tag. The device compares the configured TPID value with the TPID value in the frame. For example, if a frame carries the VLAN tag with TPID 0x8100 but the TPID configured for a customer network on a device is 0x8200, the device considers the frame untagged.

Figure 10-5  802.1Q encapsulation

Different carriers may use different TPID values in outer VLAN tags. To ensure that QinQ frames sent from a Huawei device can be transmitted across a carrier network, set the TPID value to that used by the carrier. Table 10-3 provides some of the common protocol types and their TPID values, which should not be used in such cases.
Table 10-3  Protocol types and values

Protocol Type

Value

ARP

0x0806

RARP

0x8035

IP

0x0800

IPv6

0x86DD

PPPoE

0x8863/0x8864

MPLS

0x8847/0x8848

IPX/SPX

0x8137

LACP

0x8809

802.1x

0x888E

HGMP

0x88A7

Reserved

0xFFFD/0xFFFE/0xFFFF

Translation
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Updated: 2019-01-18

Document ID: EDOC1100038843

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