Atomic Switch Port Aggregation Settings

Port aggregation on Atomic switches can be configured using either static aggregation or LACP, ensuring consistent port attributes, VLANs, and full-duplex mode for proper load balancing and redundancy.

Key Concepts

Port aggregation combines multiple physical ports into a single logical link to increase bandwidth and provide redundancy. Atomic switches support two main aggregation methods:

• Static Aggregation (ON mode): Ports are manually grouped without negotiation. All ports must have identical attributes, including VLAN, speed, and duplex, and the link must be up for aggregation to succeed .
• Dynamic Aggregation (LACP): Uses the Link Aggregation Control Protocol (802.3ad) to negotiate aggregation between devices. Ports can operate in active mode (initiates LACP negotiation) or passive mode (responds to LACP packets) to form a logical channel .

Prerequisites for Aggregation

Before configuring aggregation, ensure the following:

• Port status: All physical ports must be operational (link up) and set to full-duplex mode .
• VLAN consistency: Aggregated ports must share the same VLAN configuration and PVID .
• Port attributes: Speed, duplex, and link type (trunk, hybrid, or access) must match across all ports in the group .
• STP settings: If Spanning Tree Protocol is enabled, ensure consistent STP configuration across aggregated ports .

Configuration Steps

1. Select ports to aggregate and verify they meet prerequisites.
2. Choose aggregation mode:
   • Static: Assign ports to a logical aggregator without negotiation.
   • LACP: Configure ports in active or passive mode to negotiate with the remote device.
3. Bind ports to a logical aggregator (e.g., port-aggregator 1) on the switch .
4. Configure load balancing to distribute traffic across aggregated ports. Options include:
   • dst-mac – based on destination MAC address
   • src-mac – based on source MAC address
   • both-mac – based on both source and destination MAC
   • src-ip, dst-ip, both-ip – based on IP addresses

Best Practices

• Configure downstream switches first, then move upstream toward the core or management console .
• Use consistent cabling: Ensure DAC or fiber connections are properly matched between aggregated ports.
• Monitor aggregation status: Verify that all ports are active in the logical group and that traffic is balanced.
• Avoid mixing static and LACP on the same logical group to prevent misconfigurations . By following these settings and prerequisites, Atomic switches can achieve high-performance, redundant, and load-balanced connections across multiple physical ports.