AVB Feature Pack License
The AVB feature (including AVB, gPTP and MSRP commands)
requires the AVB Feature Pack. After obtaining the AVB Feature Pack license, use the
enable license command to install it.
MRP and MVRP do not require the AVB Feature Pack. AVB is supported on the following
platforms: Summit X450-G2, X460-G2, X670-G2, and ExtremeSwitching X440-G2 and X620.

Note
The X440-G2 supports AVB. AVB support on 48-port models is
limited to ports on the first X440-G2 switch, front-panel ports 1–24 and 51–52.

Note
Stacking is not supported with AVB features
(including AVB, gPTP and MSRP).