IP 9.1 has been enhanced with functionality to manage link aggregation, which is recognized by industry as Etherchannel or Portchannel. This means that IP server recognizes multiple connections between two devices as a single consolidated connection.

Link Aggregation allows one or more ports to be aggregated together to form a Link Aggregation Group (LAG), such that a MAC Client can treat the Link Aggregation Group as if it were a single link.


Link Aggregation Group (LAG) discovery is supported on Cisco Nexus 5000 switches through CLI discovery. LAG can be formed using LACP / PAGP (Cisco proprietary) signalling protocol. Both LACP and PAGP protocols are supported by IP.

This feature allows:

  • Detection of failure of logical groups. When there is a signal failure or a failure in all of the discrete connections, then a single Down problem is reported on the LAG.

  • Discovery of peer port connectivity and Logical Group connectivity in Cisco devices.


    This is true even when the neighbor discovery protocol is not enabled.

  • Detection of traffic load imbalance among ports that participate in an aggregation. Generates the event UnbalancedAdapterUtilization for AggregatePort when traffic load is relatively imbalanced.

  • Chapter 1 in IP Manager Reference Guide provides more information on how the this event is calculated.