Administrator Guide

Link Aggregation

Unlike IOA Automated modes (Standalone and VLT modes), the IOA Programmable MUX (PMUX) can support

multiple uplink LAGs. You can provision multiple uplink LAGs. The I/O Aggregator auto-configures with link

aggregation groups (LAGs) as follows:

• All uplink ports are automatically configured in a single port channel (LAG 128).

• Server-facing LAGs are automatically configured if you configure server for link aggregation control

protocol (LACP)-based NIC teaming (Network Interface Controller (NIC) Teaming).

No manual configuration is required to configure Aggregator ports in the uplink or a server-facing LAG.

NOTE

: Static LAGs are not supported on the SMUX Aggregator.

NOTE: In order to avoid loops, only disjoint VLANs are allowed between the uplink ports/uplink LAGs and

uplink-to-uplink switching is disabled.

Supported Modes

Standalone, VLT, PMUX, Stacking

Topics:

• How the LACP is Implemented on an Aggregator

• Link Aggregation Control Protocol (LACP)

• Configuring Auto LAG

• Configuring the Minimum Number of Links to be Up for Uplink LAGs to be Active

• Optimizing Traffic Disruption Over LAG Interfaces On IOA Switches in VLT Mode

• Preserving LAG and Port Channel Settings in Nonvolatile Storage

• Enabling the LACP link fallback member

• Enabling the Verification of Member Links Utilization in a LAG Bundle

• Monitoring the Member Links of a LAG Bundle

• Verifying LACP Operation and LAG Configuration

• Multiple Uplink LAGs with 10G Member Ports

Link Aggregation 526