No more than 8 ports are assigned to a static LAG and no more than 16 ports can be candidates for a dynamic LAG.Ports in a LAG must not be assigned to another LAG.All ports in a LAG must be of the same media type, such as Ethernet cable connectivity.All devices support up to 8 ports in a LAG group.Įvery LAG has the following characteristics: The 550 family of devices support up to 32 LAGs. The 350 family of devices support up to 8 LAGs. In particular, the LAG has port attributes similar to a regular port, such as state and speed. In general, a LAG is treated by the system as a single logical port. By Internet Protocol (IP) and MAC Addresses-Based on the destination and source IP addresses for IP packets, and destination and source MAC addresses for non-IP packets.By Media Access Control (MAC) Addresses-Based on the destination and source MAC addresses of all packets.The device supports two modes of load balancing: Traffic load balancing over the active member ports of a LAG is managed by a hash-based distribution function that distributes unicast and multicast traffic based on Layer 2 or Layer 3 packet header information. Traffic forwarded to a LAG is load-balanced across the active member ports, thus achieving an effective bandwidth close to the aggregate bandwidth of all the active member ports of the LAG.

LAGs increase bandwidth while maintaining redundancy between two devices. Link Aggregation Control Protocol (LACP) is part of the IEEE specification (802.3az) that enables you to bundle several physical ports together to form a single logical channel called a LAG. This article explains how Link Aggregation (LAG) load balancing works on Cisco 350 and 550 series switches and how to configure load balancing on your switch. Configure LAG Load Balance Algorithm on the Switch.Example of a Two Port LAG with only MAC Address Load Balancing.

Example of a Two Port LAG with IP/MAC Address Load Balancing.

How LAG Load Balancing Works on Cisco 350 and 550 Series Switches.

Software lag switch rack