When High Efficiency (HE) is enabled, it is backward compatible with 802.11ac. To enable or disable 802.11ax HE, the following list is supported.

• Cisco URWB HE supports 20/40/80 MHz bandwidth for slot 1.

• Cisco URWB HE supports 20/40/80/160 MHz bandwidth for slot 2.

• Cisco URWB, HE defaults setting is disabled.

• HE negotiation is only supported between devices with HE enabled.

To enable High Efficiency mode, use the following CLI commands.

Device# configure dot11Radio [1|2] high-efficiency enable
Device# configure dot11Radio [1|2] mcs maxmcs <mcs index in integer or string>

Note	Need to configure maxmcs as 11 by CLI “configure dot11Radio 1/2 mcs maxmcs 11” since default maxmcs is 9.

To disable High Efficiency mode, use the following CLI commands:

Device# configure dot11Radio [1|2] high-efficiency disable
default maxmcs is 9.

To validate High Efficiency mode, use the following show command.

Device# show dot11Radio 1 config
Maximum tx mcs : 9
High-Efficiency : Enabled
Maximum tx nss : 2
RTS Protection : disabled
guard-interval : 800ns

Device# show dot11Radio 2 config
Maximum tx mcs : 9
High-Efficiency : Enabled
Maximum tx nss : 2
RTS Protection : disabled
guard-interval : 800ns

Device# show eng-stats

WLAN1 Rx:

FC:58:9A:16F8:52 rate 1201 MCS 11/2 HE80/G1(800ns) ssn 48 rssi-48 received

WLAN1 Tx:

FC:58:9A:16F8:52 rate 1201 MCS 11/2 HE80/G1(800ns) sent 195612 failed 0

WLAN2 Rx:

FC:58:9A:16F8:13 rate 1201 MCS 11/2 HE80/G1(800ns) ssn 50 rssi-46 received

WLAN2 Tx:

FC:58:9A:16F8:13 rate 864 MCS 11/2 HE80/G1(800ns) sent 390797 failed 1

Global gateway mode automatically enforces MPLS (Multi-Protocol Label Switching) layer 3 and radio-off and radio status cannot be changed in global gateway mode. The below images show the GUI configuration of global gateway mode.