Introduces QoS policy behavior on link bundles, including unified policy application, bandwidth management, member link handling, and load balancing across aggregated Ethernet interfaces.
A link bundle QoS policy is a Modular QoS feature that
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applies unified QoS policies across a group of aggregated Ethernet or VLAN interfaces
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ensures consistent bandwidth management, load balancing, and scheduling for all member links, and
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simplifies configuration by allowing a single QoS policy to govern multiple physical links treated as one logical interface.
Load balancing on link bundles
Load balancing on link bundles distributes traffic across member links by using Layer 3 routing information. This mechanism includes per-destination load balancing. It ensures that all packets from the same source–destination pair use the same link, preserving packet order and preventing re-sequencing delays when multiple links are available. Per-destination load balancing is only supported on the router, which can distribute packets over any of the links in the bundle.
Layer 3 load balancing for link bundles operates on Ethernet Flow Points (EFPs) associated with the bundle interface. It is based on the IPv4 source and destination addresses in the packet. When IPv4 information is unavailable, the system automatically reverts to the default load balancing that uses the source and destination MAC (SA/DA) fields.