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NE40E V800R010C10SPC500 Feature Description - Security 01

This is NE40E V800R010C10SPC500 Feature Description - Security
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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).
MAC Address Limit Fundamentals

MAC Address Limit Fundamentals

During MAC address learning, MAC address limit is used to restrict the maximum number of MAC addresses that can be learnt by an interface. The basic principles are as follows:

  • MAC address limit based on Port or Port+VLAN or PW

1. When a user packet passes through a port enabled with MAC address limit based on Port or Port+VLAN or PW, the NE40E learns the source MAC address and forwarding information carried in the user packet and experiences the limit process.

2. Limit process: The NE40E first determines whether the source MAC address to be learnt exists in the MAC table. If so, the packet is simply forwarded; if not, the NE40E checks whether the number of MAC addresses that are learnt previously reaches the maximum number set in MAC address limit. If the set maximum number is not reached, the NE40E learns the MAC address of the packet; If the set maximum number is reached, the NE40E discards or forwards the packet based on the action set in MAC address limit.

  • MAC address limit based on a VLAN in a broadcast domain or a VSI or on a BD

1. When a user packet is forwarded in a broadcast domain configured with MAC address limit, the NE40E learns the source MAC address of the packet on the outbound interface. If the source MAC address of the packet exists in the MAC table, the NE40E simply forwards the packet; if the source MAC address of the packet does not exist in the MAC table, the NE40E checks whether the number of MAC addresses learnt previously reaches the maximum number set in MAC address limit. If not, the NE40E learns the MAC address of the packet; if so, the NE40E discards or forwards the packet based on the action configured in MAC address limit.

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Updated: 2019-01-03

Document ID: EDOC1100055047

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