Abstract:
A system and method is provided for sending congestion notification messages through L3 networks. For example, a data packet is received at a first switch (533) in a first fabric block (510) of an L3 network, and the first switch performs source MAC tagging of the data packet. The data packet is then forwarded to a second switch (555) in a second fabric block (560) of the L3 network, and the source MAC tag is maintained by the second switch (555) and any intermediate switches (544). The second switch (555) determines, in response to receiving the data packet, whether it is congested, and generates a notification message (585) if it is congested. The notification message (585) is L2 forwarded to the first fabric block (510), and further forwarded from the first switch (533) to a source (511) of the data packet using ACL matching.
Abstract:
Methods and systems for generating a forwarding table for a packet switch. The system includes a route manager for the packet switch, configured to identify a plurality of multi-path groups each corresponding to a respective initial set of routing entries in the forwarding table and generate, for one or more multi-path groups, at least one replacement set of routing entries with fewer routing entries than the initial set corresponding to the respective multi-path group. The route manager selects, based on a traffic reduction cost metric, one or more of the replacement sets of routing entries, each corresponding to a different respective multi-path group, and updates the forwarding table with the selected replacement sets. In some implementations, the traffic reduction cost metric includes a traffic characteristic. In some implementations, the packet switch participates in a software-defined network (SDN) and the route manager is part of an SDN controller.