Aging method and device for medium access control address

Abstract

The invention discloses an aging method and device for medium access control address. The method comprises following steps: obtaining medium access control (MAC) address information carried by a message through analyzing the received message; determining a MAC address table corresponding to the MAC address information from multiple MAC address tables according to the MAC address information and a corresponding relation between the multiple MAC address tables with different aging times and MAC address information , wherein each of the multiple MAC address tables is counted by one counter; creating or updating the MAC address information in the determined MAC address table and performing counting on the MAC address information by a count value obtained according to a preset time interval, wherein the preset time interval is no longer than the aging time corresponding to the determined MAC address table. By use of the method, multiple MAC address tables with different aging times are created to meet the requirement of flexibility for services; counting of the MAC address information is performed by the count value obtained according to a time interval so that the aging precision is increased, wherein the time interval is no longer than the aging time.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a method and device for aging media access control addresses. Background technique [0002] With the increasing popularity of network applications and the increasing scale of the network, the amount of information that needs to be transmitted on the Internet has greatly increased. For Ethernet switches, Layer 2 forwarding is based on the MAC (MediaAccessControl, Media Access Control) address, which is stored in the MAC address table. Through operations such as learning, updating, and aging deletion of MAC addresses, maintenance The correctness of the MAC address table, so as to realize the Layer 2 forwarding function of the Ethernet switch. Wherein, when aging the MAC address entries, a counter is configured for each MAC address entry in the MAC address table. When there are many MAC address entries, a large number of counters are needed, resulting in high ...

AI Technical Summary

Problems solved by technology

[0005] Under such an aging mechanism, when a MAC address entry is newly created or updated at a certain moment, the state of the MAC address entry will not be obtained immediately, but will be obtained when the counter counts to a preset value. The state of the table item, for example, when the preset value is 300s, each time the counter counts to 300s, the state of the table item is obtained once. The state of the entry is obtained only after 300s, and then the state of the entry is obtained again when the count value of the counter reaches 300s again. By comparing the state of the entry obtained twice, it is determined whether to age the entry. In this way, the actual state of the entry The aging time is 599s; when a table item is newly created or updated when the counter counts to 299s, it needs to wait until the counter counts to 300s to get the status of the table item, and then wait until the counter counts to 300s again to get the status of the table item again. Determine whether to age the entry by comparing the state of the entry obtained twice. In this way, the actual aging time of the entry is 301s. Under this aging mechanism, the actual aging time of the MAC address is not 300s, but between 301s- In the range of 599s, the actual aging time of the MAC address entry is very inaccurate, resulting in the inability to delete / update the MAC address table in time

In addition, under the existing aging mechanism, the aging time of all MAC address entries is the same, which cannot meet the flexibility requirements of the business and has certain limitations.

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