Abstract
Systems and methods optimize link aggregation hashing in a Multi-Chassis Link Aggregation (MC-LAG) topology in which a Customer Equipment (CE) device is dual-homed to a plurality of Provider Edge (PE) devices. Each PE device determines a capacity value representing its effective forwarding capacity, based on dynamic health metrics including core-facing Network-to-Network Interface (NNI) bandwidth, and encodes the capacity value in an optional Type-Length-Value (TLV) object carried in Link Aggregation Control Protocol Data Units (LACPDUs). The CE device parses the capacity value for each member link and programs an egress hashing engine to perform weighted load balancing, distributing flows across the PE devices in proportion to the advertised capacity values. Capability negotiation is implicit, the feature engaging only where both peers exchange the TLV and otherwise falling back to standard LACP. The capacity signaling decouples logical forwarding health from physical link state, enabling partial-capacity signaling without link shutdown and preventing traffic black-holing during partial NNI degradation.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Anonymous, "Capacity-Based LACP Signaling for Proportional Traffic Distribution in Multi-Chassis Link Aggregation", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/11242