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S9300, S9300E, and S9300X V200R012C00 Configuration Guide - Ethernet Switching

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, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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Overview of MAC Addresses

Overview of MAC Addresses

A MAC address uniquely identifies a network interface card (NIC) of a network device. A MAC address consists of 48 bits and is displayed as a 12-digit hexadecimal number. Bits 0 to 23 are assigned by the IETF and other institutions to identify vendors, and bits 24 to 47 are the unique ID assigned by vendors to identify their NICs.

MAC addresses fall into the following types:

  • Physical MAC address: uniquely identifies a terminal on an Ethernet network and is the globally unique hardware address.

  • Broadcast MAC address: indicates all terminals on a LAN. The broadcast address is all 1s (FF-FF-FF-FF-FF-FF).

  • Multicast MAC address: indicates a group of terminals on a LAN. All the MAC addresses with the eighth bit as 1 are multicast MAC addresses (for example, 01-00-00-00-00-00), excluding the broadcast MAC address. The multicast MAC address starting from 01-80-c2 is the BPDU MAC address, and is often used as the destination MAC address of protocol packets.

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Updated: 2019-01-18

Document ID: EDOC1100038290

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