Link Aggregation Control Protocol wiki

最新推荐文章于 2025-03-29 14:08:33 发布

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本文介绍了IEEE规范中的链路聚合控制协议(LACP)，该协议用于控制多个物理端口捆绑成单一逻辑通道的方法。文章详细解释了LACP的工作原理，包括最大捆绑端口数量、LACP数据包的发送机制、负载均衡模式及LACP模式等。

Link Aggregation Control Protocol[edit]

Within the IEEE specification, the Link Aggregation Control Protocol (LACP) provides a method to control the bundling of several physical ports together to form a single logical channel. LACP allows a network device to negotiate an automatic bundling of links by sending LACP packets to the peer (directly connected device that also implements LACP).

LACP Features and practical examples

Maximum number of bundled ports allowed in the port channel : Valid values are usually from 1 to 8.
LACP packets are sent with multicast group MAC address 01:80:c2:00:00:02 (01-80-c2-00-00-02)
During LACP detection period
- LACP packets are transmitted every second
- Keep alive mechanism for link member: (default: slow = 30s, fast=1s)
LACP can have the port-channel load-balance mode :
- link (link-id) Integer that identifies the member link for load balancing. The range is from 1 to 8.
LACP mode :
- active : Enables LACP unconditionally.
- passive : Enables LACP only when an LACP device is detected. (This is the default state)