No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Ethernet Switching

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

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, and Layer 2 protocol transparent transmission.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Definition and Classification of MAC Address Entries

Definition and Classification of MAC Address Entries

Definition of a MAC Address Table

A MAC address table is used by the switch to record the mappings between learned MAC addresses of other devices and interfaces on which MAC addresses are learned, as well as VLANs to which the interfaces belong. When the switch receives a packet, it searches the MAC address table for the MAC address of the destination. If the switch finds the MAC address, it forwards the packet from the corresponding outbound interface in the MAC address entry. Otherwise, the switch broadcasts the packet to all interfaces (except the interface on which the packet was received) in the associated VLAN.

Classification of MAC Address Entries

MAC address entries are classified into dynamic, static, and blackhole entries. Service modules may further classify dynamic MAC address entries according to service types, for example, secure MAC, MUX MAC, authen MAC, and guest MAC.

Table 2-1  Characteristics and functions of different MAC address entries

MAC Address Entry Type

Characteristics

Function

Dynamic MAC address entry

  • Dynamic MAC address entries are obtained by learning the source MAC address of a packet received on an interface, and can be aged.
  • Dynamic MAC address entries do not persist across system restart.
  • You can check whether data is forwarded between two connected devices by checking dynamic MAC address entries.
  • You can obtain the number of communicating users connected to an interface by checking the number of specified dynamic MAC address entries.

Static MAC address entry

  • Static MAC address entries are manually configured. Static MAC address entries are not aged.
  • The static MAC address entries persist across system restart once saved in the system.
  • Interfaces other than that statically bound to the MAC address in the entry discard packets that originate from this MAC address.
  • A static MAC address entry can have only one outbound interface.
  • Statically binding an interface to a MAC address does not affect the learning of dynamic MAC address entries on the interface.

A static MAC address entry can be configured to allow an authorized user to access network resources and prevent other users from using the bound MAC address to initiate attacks.

Blackhole MAC address entry

  • Blackhole MAC address entries are manually configured. Blackhole MAC address entries are not aged.
  • The blackhole MAC address entries persist across system restart once saved in the system.
  • The switch discards packets from or destined to a blackhole MAC address.

A blackhole MAC address entry can be configured to filter out unauthorized users.

Translation
Download
Updated: 2018-12-24

Document ID: EDOC1100038339

Views: 166534

Downloads: 697

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next