Per-fp-egr-queuing optimization for LAG ports provides the ability to reduce the number of egress resources consumed by each SAP on a LAG, and by any encap groups that exist on those SAPs.
When the feature is enabled in the config>lag>access context, the queue and virtual scheduler allocation are optimized. Only one queuing set and one H-QoS virtual scheduler tree per SAP/encap group is allocated per egress forwarding path (FP) instead of one set per each port of the LAG. In case of a link failure/recovery, egress traffic uses failover queues while the queues are moved over to a newly active link.
Per-fp-egr-queuing can be enabled on existing LAG with services as long as the following conditions are met.
The LAG’s mode must be access or hybrid.
The LAG’s port-type must be standard.
The LAG must have either per-link-hash enabled or all SAPs on the LAG must use per-service-hashing only and be of a type: VPLS SAP, i-VPLS SAP, or e-Pipe VLL or PBB SAP.
To disable per-fp-egr-queuing, all ports must first be removed from a specific LAG.