Overview of Trunk


Trunk is a technology that bundles multiple physical interfaces into a single logical interface. This logical interface is called a trunk interface, and each bundled physical interface is called a member interface.

Trunk technology helps increase bandwidth, enhance reliability, and carry out load balancing.


Without trunk technology, the transmission rate between two network devices connected by a 100 Mbit/s Ethernet twisted pair cable can only reach 100 Mbit/s. To obtain a higher transmission rate, you must change the transmission media or upgrade the network to a Gigabit Ethernet, which is costly to small- and medium- sized enterprises and schools.

Trunk technology provides an economical solution. For example, a trunk interface with three 100 Mbit/s member interfaces working in full-duplex mode can provide a maximum bandwidth of 300 Mbit/s.


This feature offers the following benefits:

  • Increased bandwidth

  • Improved link reliability through traffic load balancing

Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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