Port channel in 802.11ac

by ‎10-18-2016 03:12 PM - edited ‎10-18-2016 03:12 PM
Q:

How does upstream and downstream port channel work in 802.11ac APs and clients?



A:

AP support 802.3ad (LACP) as well as Static Port channel.

Downstream:
Packets are sprayed from Controller to both Ethernet ports of AP.
AP re-orders packets and delivers to wireless clients (in-order delivery) made possible by per-STA per-TID sequencing in GRE header for data packets from Controller.

Upstream:
Packets spraying based on Destination MAC of packet (hashed to 2 buckets statically).

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