LACP

Link Aggregation Control Protocol:

• Allows aggregation of 2 or more ports to form LAG's (Link Aggregation Group's) so a MAC Client can treat the LAG as if it were a single link
• Dynamically detects when links can be aggregated and does so when links become available
• Capable of connecting to SMLT aggregated pair - provides standardized external link aggregation interface to third party vendors
  
• Able to detect link layer failure within SP Network
• Packets are exchanged end-to-end

Rules and Guidelines:

• All ports in group must be in full duplex/same data rate
• Must be in the same VLAN
• LAG's must be in the same STP group (if applicable)

Configuration:

• Port Priority: Which ports are standby if more than maximum number of ports in LAG is configured
• System Priority: Generates Switch ID, determines Master Slave between SMLT apps.
• Keys: Used to determine which ports are aggregated in to LAG, they do not need to match between peers
• Timers: timeout x slow-periodic-time = 3 x 30s = 90s
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