Example for Configuring High-Density WLAN Services
Service Requirements
The WLAN of a stadium needs to provide access for a large number of users; therefore, APs are placed in close proximity, causing severe interference. The IT department of the stadium requires that the interference be eliminated to maximize Internet experience for users.
Networking Requirements
- AC networking mode: Layer 2 bypass mode
- DHCP deployment mode:
- The AC functions as a DHCP server to assign IP addresses to APs.
- The aggregation switch (SwitchB) functions as a DHCP server to assign IP addresses to STAs.
- Service data forwarding mode: direct forwarding
Data Planning
Item |
Data |
|---|---|
Management VLAN for APs |
VLAN 10 and VLAN 100 |
Service VLAN for STAs |
VLAN pool
|
DHCP server |
The AC functions as a DHCP server to assign IP addresses to APs. The aggregation switch (SwitchB) functions as a DHCP server to assign IP addresses to STAs. |
IP address pool for APs |
10.23.10.2-10.23.10.254/24 |
IP address pool for STAs |
10.23.101.3-10.23.101.254/24 10.23.102.3-10.23.102.254/24 |
AC's source interface address |
VLANIF 100: 10.23.100.1/24 |
AP group |
|
Regulatory domain profile |
|
SSID profile |
|
Security profile |
|
VAP profile |
|
RRM profile |
|
2G radio profile |
|
5G radio profile |
|
Traffic profile |
|
Configuration Roadmap
- Configure network interworking of the APs, AC, and other network devices.
- Configure the APs to go online.
- Create an AP group and add APs that require the same configuration to the group for unified configuration.
- Configure AC system parameters, including the country code and source interface used by the AC to communicate with the APs.
- Configure the AP authentication mode and import the APs offline to allow the APs to go online.
- Configure WLAN service parameters for STAs to access the WLAN.
Adjust WLAN high-density parameters.
You are advised to adjust WLAN high-density parameters according to Table 4-4.
Table 4-4 Adjustment recommendationsAdjustment Item
Purpose
Recommendation
Configure 5G-prior access
To reduce the burden on the 2.4 GHz radio by preferentially connecting 5G-capable STAs to the 5 GHz radio when a large number of 2.4 GHz STAs exist on the network.
Enable band steering. By default, band steering is enabled.
Remove the limit on the number of access users
To make an AP offer wireless services to more users.
Increase the maximum number of access users to 128 for an SSID profile.
Reduce the user association aging time
To prevent users who frequently disconnect from the wireless network.
Set the association aging time to 1 minute.
User isolation
To prevent mobile terminals from exchanging a large number of ARP packets.
Enable user isolation on the AC.
Limit user rates
To prevent advantaged STAs from occupying too many rate sources and deteriorating service experience of disadvantaged STAs.
Limit the downstream rate of each STA to 2000 kbit/s in a VAP. Adjust the upstream rate according to actual situations. In this example, the upstream rate is set to 1000 kbit/s.
Adjust AP channel and power
To reduce interference between APs.
- Channel: Prevent adjacent APs from working on overlapping channels. It is recommended that you configure channels 1, 9, 5, and 13 in a high-density WLAN environment.
- Power: Minimize AP power while ensuring that the RSSI is greater than -65 dBm at the edge of the AP's coverage area.
Configure smart roaming
To prevent weak-signal STAs from degrading user experience.
Enable smart roaming and set the SNR threshold to 15 dB.
Enable airtime fair scheduling
To ensure that wireless channel resources can be equally allocated to users.
Enable airtime fair scheduling.
Set the RTS-CTS threshold
To prevent hidden STAs.
Set the RTS-CTS operation mode to rts-cts and the RTS threshold to 1400 bytes.
Adjust the interval at which Beacon frames are sent
To improve the overall data traffic of APs.
Set the interval for sending Beacon frames to 160 TUs.
Adjust the transmit rate of 2.4 GHz management frames
To reduce wireless resource occupation of management frames and improve channel usage efficiency.
Set the transmit rate of 2.4 GHz management frames to 11 Mbit/s.
Set the guard interval (GI) mode to short GI
To reduce extra overhead and improve AP transmission efficiency.
Set the GI mode to short GI.
Configure the basic rate set
To improve the overall AP throughput.
Delete low rates from the basic rate set.
Configure the multicast rate
To improve air interface efficiency.
Use the default values. By default, the multicast transmit rate of wireless packets is 11 Mbit/s for the 2.4 GHz radio and 6 Mbit/s for the 5 GHz radio.
Configure the short preamble for a radio
To improve the network synchronization performance.
Configure the short preamble. If some legacy NICs exist on the network, disable the short preamble function.
Dynamic EDCA parameter adjustment
To improve user experience.
Enable the dynamic EDCA parameter adjustment, and keep the default threshold for the dynamic EDCA Best-Effort service.
- Deliver WLAN services to the APs and verify the configuration.
Configuration Notes
- No ACK mechanism is provided for multicast packet transmission on air interfaces. In addition, wireless links are unstable. To ensure stable transmission of multicast packets, they are usually sent at low rates. If a large number of such multicast packets are sent from the network side, the air interfaces may be congested. You are advised to configure multicast packet suppression to reduce impact of a large number of low-rate multicast packets on the wireless network. Exercise caution when configuring the rate limit; otherwise, the multicast services may be affected.
- In direct forwarding mode, you are advised to configure multicast packet suppression on switch interfaces connected to APs.
- In tunnel forwarding mode, you are advised to configure multicast packet suppression in traffic profiles of the AC.
Configure port isolation on the interfaces of the device directly connected to APs. If port isolation is not configured and direct forwarding is used, a large number of unnecessary broadcast packets may be generated in the VLAN, blocking the network and degrading user experience.
In tunnel forwarding mode, the management VLAN and service VLAN cannot be the same. Only packets from the management VLAN are transmitted between the AC and APs. Packets from the service VLAN are not allowed between the AC and APs.
Procedure
- Configure the network devices.# Add GE0/0/1 and GE0/0/2 on SwitchA to VLANs 10, 101, and 102. The default VLAN of GE0/0/1 and GE0/0/3 is VLAN 10.
<HUAWEI> system-view [HUAWEI] sysname SwitchA [SwitchA] vlan batch 10 101 102 [SwitchA] interface gigabitethernet 0/0/1 [SwitchA-GigabitEthernet0/0/1] port link-type trunk [SwitchA-GigabitEthernet0/0/1] port trunk pvid vlan 10 [SwitchA-GigabitEthernet0/0/1] port trunk allow-pass vlan 10 101 102 [SwitchA-GigabitEthernet0/0/1] port-isolate enable [SwitchA-GigabitEthernet0/0/1] quit [SwitchA] interface gigabitethernet 0/0/2 [SwitchA-GigabitEthernet0/0/2] port link-type trunk [SwitchA-GigabitEthernet0/0/2] port trunk allow-pass vlan 10 101 102 [SwitchA-GigabitEthernet0/0/2] quit [SwitchA] interface gigabitethernet 0/0/3 [SwitchA-GigabitEthernet0/0/3] port link-type trunk [SwitchA-GigabitEthernet0/0/3] port trunk pvid vlan 10 [SwitchA-GigabitEthernet0/0/3] port trunk allow-pass vlan 10 101 102 [SwitchA-GigabitEthernet0/0/3] port-isolate enable [SwitchA-GigabitEthernet0/0/3] quit
# On SwitchB (aggregation switch), add GE0/0/1 to VLAN 10, VLAN 101, and VLAN 102, GE0/0/2 to VLAN 100, and GE0/0/3 to VLAN 101 and VLAN 102. Create VLANIF 100 and set its IP address to 10.23.100.2/24.<HUAWEI> system-view [HUAWEI] sysname SwitchB [SwitchB] vlan batch 10 100 101 102 [SwitchB] interface gigabitethernet 0/0/1 [SwitchB-GigabitEthernet0/0/1] port link-type trunk [SwitchB-GigabitEthernet0/0/1] port trunk allow-pass vlan 10 101 102 [SwitchB-GigabitEthernet0/0/1] quit [SwitchB] interface gigabitethernet 0/0/2 [SwitchB-GigabitEthernet0/0/2] port link-type trunk [SwitchB-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 [SwitchB-GigabitEthernet0/0/2] quit [SwitchB] interface gigabitethernet 0/0/3 [SwitchB-GigabitEthernet0/0/3] port link-type trunk [SwitchB-GigabitEthernet0/0/3] port trunk allow-pass vlan 101 102 [SwitchB-GigabitEthernet0/0/3] quit [SwitchB] interface vlanif 100 [SwitchB-Vlanif100] ip address 10.23.100.2 24 [SwitchB-Vlanif100] quit
# On Router, add GE1/0/0 to VLAN 101 and VLAN 102. Create VLANIF 101 and VLANIF 102, and set the IP address of VLANIF 101 to 10.23.101.2/24 and the IP address of VLANIF 102 to 10.23.102.2/24.<Huawei> system-view [Huawei] sysname Router [Router] vlan batch 101 102 [Router] interface gigabitethernet 1/0/0 [Router-GigabitEthernet1/0/0] port link-type trunk [Router-GigabitEthernet1/0/0] port trunk allow-pass vlan 101 102 [Router-GigabitEthernet1/0/0] quit [Router] interface vlanif 101 [Router-Vlanif101] ip address 10.23.101.2 24 [Router-Vlanif101] quit [Router] interface vlanif 102 [Router-Vlanif102] ip address 10.23.102.2 24 [Router-Vlanif102] quit
- Configure the AC to communicate with the network devices.# Add GE0/0/1 on the AC to VLAN 100 and create VLANIF 100.
<HUAWEI> system-view [HUAWEI] sysname AC [AC] vlan 100 [AC-vlan100] quit [AC] interface vlanif 100 [AC-Vlanif100] ip address 10.23.100.1 24 [AC-Vlanif100] quit [AC] interface gigabitethernet 0/0/1 [AC-GigabitEthernet0/0/1] port link-type trunk [AC-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 [AC-GigabitEthernet0/0/1] quit
# Configure a route from the AC to the APs with the next hop as SwitchB's VLANIF 100.[AC] ip route-static 10.23.10.0 24 10.23.100.2
- Configure the DHCP servers to assign IP addresses to APs and STAs.# On SwitchB, configure DHCP relay to assign IP addresses on behalf of the AC.
[SwitchB] dhcp enable [SwitchB] interface vlanif 10 [SwitchB-Vlanif10] ip address 10.23.10.1 24 [SwitchB-Vlanif10] dhcp select relay [SwitchB-Vlanif10] dhcp relay server-ip 10.23.100.1 [SwitchB-Vlanif10] quit
# On SwitchB, configure VLANIF 101 and VLANIF 102 to assign IP addresses to STAs and set the default gateways.Configure the DNS server as required. The common methods are as follows:- In interface address pool scenarios, run the dhcp server dns-list ip-address &<1-8> command in the VLANIF interface view.
- In global address pool scenarios, run the dns-list ip-address &<1-8> command in the IP address pool view.
[SwitchB] interface vlanif 101 [SwitchB-Vlanif101] ip address 10.23.101.1 24 [SwitchB-Vlanif101] dhcp select interface [SwitchB-Vlanif101] dhcp server gateway-list 10.23.101.2 [SwitchB-Vlanif101] quit [SwitchB] interface vlanif 102 [SwitchB-Vlanif102] ip address 10.23.102.1 24 [SwitchB-Vlanif102] dhcp select interface [SwitchB-Vlanif102] dhcp server gateway-list 10.23.102.2 [SwitchB-Vlanif102] quit
# On the AC, create a global IP address pool to assign IP addresses to APs.[AC] dhcp enable [AC] ip pool huawei [AC-ip-pool-huawei] network 10.23.10.0 mask 24 [AC-ip-pool-huawei] gateway-list 10.23.10.1 [AC-ip-pool-huawei] option 43 sub-option 3 ascii 10.23.100.1 [AC-ip-pool-huawei] quit [AC] interface vlanif 100 [AC-Vlanif100] dhcp select global [AC-Vlanif100] quit
- Configure a VLAN pool for service VLANs. # On the AC, create a VLAN pool, add VLAN 101 and VLAN 102 to the pool, and set the VLAN assignment algorithm to hash in the VLAN pool.
This example uses the VLAN assignment algorithm hash (default) as an example. If the default setting is not changed before, you do not need to run the assignment hash command.
In this example, only VLAN 101 and VLAN 102 are added to the VLAN pool. You can use the similar method to add multiple VLANs to a VLAN pool.
[AC] vlan batch 101 102 [AC] vlan pool sta-pool [AC-vlan-pool-sta-pool] vlan 101 102 [AC-vlan-pool-sta-pool] assignment hash [AC-vlan-pool-sta-pool] quit
- Configure an AP to go online.# Create an AP group to which the APs with the same configuration can be added.
[AC] wlan [AC-wlan-view] ap-group name ap-group1 [AC-wlan-ap-group-ap-group1] quit
# Create a regulatory domain profile, configure the AC country code in the profile, and apply the profile to the AP group.[AC-wlan-view] regulatory-domain-profile name default [AC-wlan-regulate-domain-default] country-code cn [AC-wlan-regulate-domain-default] quit [AC-wlan-view] ap-group name ap-group1 [AC-wlan-ap-group-ap-group1] regulatory-domain-profile default Warning: Modifying the country code will clear channel, power and antenna gain configurations of the radio and reset the AP. Continue?[Y/N]:y [AC-wlan-ap-group-ap-group1] quit [AC-wlan-view] quit
# Configure the AC's source interface.In V200R021C00 and later versions, when the CAPWAP source interface or source address is configured, the system checks whether security-related configurations exist, including the PSK for DTLS encryption, PSK for DTLS encryption between ACs, user name and password for logging in to the AP, and password for logging in to the global offline management VAP, the configuration can be successful only when both of them exist. Otherwise, the system prompts you to complete the configuration first.
[AC] capwap source interface vlanif 100 Set the DTLS PSK(contains 6-32 plain-text characters, or 48 or 68 cipher-text characters that must be a combination of at least two of the following: lowercase letters a to z, uppercase letters A to Z, digits, and special characters):****** Set the DTLS inter-controller PSK(contains 6-32 plain-text characters, or 48 or 68 cipher-text characters that must be a combination of at least two of the following: lowercase letters a to z, uppercase letters A to Z, digits, and special characters):****** Set the user name for FIT APs(contains 4-31 plain-text characters, which can only include letters, digits and underlines. And the first character must be a letter):admin Set the password for FIT APs(plain-text password of 8-128 characters or cipher-text password of 48-188 characters that must be a combination of at least three of the following: lowercase letters a to z, uppercase letters A to Z, digits, and special characters):******** Set the global temporary-management psk(contains 8-63 plain-text characters, or 48-108 cipher-text characters that must be a combination of at least two of the following: lowercase letters a to z, uppercase letters A to Z, digits, and special characters):********
# Import the AP offline on the AC and add the AP to AP group ap-group1. Assume that the AP's MAC address is 60de-4476-e360. Configure a name for the AP based on the AP's deployment location, so that you can know where the AP is deployed from its name. For example, name the AP area_1 if it is deployed in Area 1.The default AP authentication mode is MAC address authentication. If the default settings are retained, you do not need to run the ap auth-mode mac-auth command.
In this example, the AP5030DN is used and has two radios: radio 0 and radio 1. Radio 0 of the AP5030DN works on the 2.4 GHz frequency band and radio 1 works on the 5 GHz frequency band.
[AC] wlan [AC-wlan-view] ap auth-mode mac-auth [AC-wlan-view] ap-id 0 ap-mac 60de-4476-e360 [AC-wlan-ap-0] ap-name area_1 Warning: This operation may cause AP reset. Continue? [Y/N]:y [AC-wlan-ap-0] ap-group ap-group1 Warning: This operation may cause AP reset. If the country code changes, it will clear channel, power and antenna gain configuration s of the radio, Whether to continue? [Y/N]:y [AC-wlan-ap-0] quit
# After the AP is powered on, run the display ap all command to check the AP state. If the State field is displayed as nor, the AP goes online successfully.[AC-wlan-view] display ap all Total AP information:nor : normal [1] Extra information: P : insufficient power supply -------------------------------------------------------------------------------------------------- ID MAC Name Group IP Type State STA Uptime ExtraInfo -------------------------------------------------------------------------------------------------- 0 60de-4476-e360 area_1 ap-group1 10.23.10.254 AP5030DN nor 0 10S - -------------------------------------------------------------------------------------------------- Total: 1
- Configure WLAN service parameters.# Create security profile wlan-net and configure a security policy in the profile.
In this example, the security policy is set to WPA-WPA2+PSK+AES and the password to a1234567. In actual situations, the security policy must be configured according to service requirements.
[AC-wlan-view] security-profile name wlan-net [AC-wlan-sec-prof-wlan-net] security wpa-wpa2 psk pass-phrase a1234567 aes [AC-wlan-sec-prof-wlan-net] quit
# Create SSID profile wlan-net and set the SSID name to wlan-net.[AC-wlan-view] ssid-profile name wlan-net [AC-wlan-ssid-prof-wlan-net] ssid wlan-net [AC-wlan-ssid-prof-wlan-net] quit
# Create VAP profile wlan-net, set the data forwarding mode and service VLAN, and apply the security profile and SSID profile to the VAP profile.[AC-wlan-view] vap-profile name wlan-net [AC-wlan-vap-prof-wlan-net] forward-mode direct-forward [AC-wlan-vap-prof-wlan-net] service-vlan vlan-pool sta-pool [AC-wlan-vap-prof-wlan-net] security-profile wlan-net [AC-wlan-vap-prof-wlan-net] ssid-profile wlan-net [AC-wlan-vap-prof-wlan-net] quit
# Bind VAP profile wlan-net to the AP group and apply the profile to radio 0 and radio 1 of the AP.[AC-wlan-view] ap-group name ap-group1 [AC-wlan-ap-group-ap-group1] vap-profile wlan-net wlan 1 radio 0 [AC-wlan-ap-group-ap-group1] vap-profile wlan-net wlan 1 radio 1 [AC-wlan-ap-group-ap-group1] quit
- Adjust WLAN high-density parameters.
- Set the channels and power for AP radios.
Automatic channel and power calibration functions are enabled by default. The manual channel and power configurations take effect only when these two functions are disabled. The settings of the AP channel and power in this example are for reference only. You need to configure the AP channel and power based on the actual country code and network planning.
# Disable automatic channel and power calibration functions of radio 0, and configure the channel and power for radio 0.[AC-wlan-view] ap-id 0 [AC-wlan-ap-0] radio 0 [AC-wlan-radio-0/0] calibrate auto-channel-select disable [AC-wlan-radio-0/0] calibrate auto-txpower-select disable [AC-wlan-radio-0/0] channel 20mhz 6 Warning: This action may cause service interruption. Continue?[Y/N]y [AC-wlan-radio-0/0] eirp 127 [AC-wlan-radio-0/0] quit# Disable automatic channel and power calibration functions of radio 1, and configure the channel and power for radio 1.[AC-wlan-ap-0] radio 1 [AC-wlan-radio-0/1] calibrate auto-channel-select disable [AC-wlan-radio-0/1] calibrate auto-txpower-select disable [AC-wlan-radio-0/1] channel 20mhz 149 Warning: This action may cause service interruption. Continue?[Y/N]y [AC-wlan-radio-0/1] eirp 127 [AC-wlan-radio-0/1] quit [AC-wlan-ap-0] quit - Verify the configuration.
WLAN service configuration is automatically delivered to the APs. After the service configuration is complete, run the display vap ssid wlan-net command. If Status in the command output displays as ON, the VAPs have been successfully created on AP radios.
[AC-wlan-view] display vap ssid wlan-net WID : WLAN ID -------------------------------------------------------------------------------- AP ID AP name RfID WID BSSID Status Auth type STA SSID -------------------------------------------------------------------------------- 0 area_1 0 1 60DE-4476-E360 ON WPA/WPA2-PSK 0 wlan-net 0 area_1 1 1 60DE-4476-E370 ON WPA/WPA2-PSK 0 wlan-net ------------------------------------------------------------------------------- Total: 2
Connect STAs to the WLAN with SSID wlan-net and enter the password a1234567. Run the display station ssid wlan-net command on the AC. The command output shows that the STAs are connected to the WLAN wlan-net.
[AC-wlan-view] display station ssid wlan-net Rf/WLAN: Radio ID/WLAN ID Rx/Tx: link receive rate/link transmit rate(Mbps) --------------------------------------------------------------------------------- STA MAC AP ID Ap name Rf/WLAN Band Type Rx/Tx RSSI VLAN IP address --------------------------------------------------------------------------------- e019-1dc7-1e08 0 area_1 1/1 5G 11n 46/59 -68 101 10.23.101.254 --------------------------------------------------------------------------------- Total: 1 2.4G: 0 5G: 1
When a large number of users connect to the network in the stadium, the users still have good Internet experience.
Configuration Files
SwitchA configuration file
# sysname SwitchA # vlan batch 10 101 to 102 # interface GigabitEthernet0/0/1 port link-type trunk port trunk pvid vlan 10 port trunk allow-pass vlan 10 101 to 102 port-isolate enable # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 10 101 to 102 # interface GigabitEthernet0/0/3 port link-type trunk port trunk pvid vlan 10 port trunk allow-pass vlan 10 101 to 102 port-isolate enable # return
SwitchB configuration file
# sysname SwitchB # vlan batch 10 100 to 102 # dhcp enable # interface Vlanif10 ip address 10.23.10.1 255.255.255.0 dhcp select relay dhcp relay server-ip 10.23.100.1 # interface Vlanif100 ip address 10.23.100.2 255.255.255.0 # interface Vlanif101 ip address 10.23.101.1 255.255.255.0 dhcp select interface dhcp server gateway-list 10.23.101.2 # interface Vlanif102 ip address 10.23.102.1 255.255.255.0 dhcp select interface dhcp server gateway-list 10.23.102.2 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 10 101 to 102 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 # interface GigabitEthernet0/0/3 port link-type trunk port trunk allow-pass vlan 101 to 102 # return
Router configuration file
# sysname Router # vlan batch 101 to 102 # interface Vlanif101 ip address 10.23.101.2 255.255.255.0 # interface Vlanif102 ip address 10.23.102.2 255.255.255.0 # interface GigabitEthernet1/0/0 port link-type trunk port trunk allow-pass vlan 101 to 102 # return
AC configuration file
# sysname AC # vlan batch 100 to 102 # vlan pool sta-pool vlan 101 to 102 # dhcp enable # ip pool huawei gateway-list 10.23.10.1 network 10.23.10.0 mask 255.255.255.0 option 43 sub-option 3 ascii 10.23.100.1 # interface Vlanif100 ip address 10.23.100.1 255.255.255.0 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 100 # ip route-static 10.23.10.0 24 10.23.100.2 # capwap source interface vlanif100 # wlan traffic-profile name wlan-traffic rate-limit client up 4000 rate-limit client down 4000 security-profile name wlan-net security wpa-wpa2 psk pass-phrase %^%#wQ}eV*m'Y#f6Mj@h#DxTLrKaYm|)pBm@w$(jpeqE%^%# aes ssid-profile name wlan-net ssid wlan-net association-timeout 1 max-sta-number 128 beacon-2g-rate 11 vap-profile name wlan-net service-vlan vlan-pool sta-pool ssid-profile wlan-net security-profile wlan-net traffic-profile wlan-traffic regulatory-domain-profile name default rrm-profile name wlan-rrm airtime-fair-schedule enable smart-roam roam-threshold snr 15 dynamic-edca enable radio-2g-profile name wlan-radio2g dot11bg basic-rate 6 9 12 18 24 36 48 54 beacon-interval 160 guard-interval-mode short multicast-rate 11 rrm-profile wlan-rrm rts-cts-threshold 1400 rts-cts-mode rts-cts radio-5g-profile name wlan-radio5g beacon-interval 160 guard-interval-mode short multicast-rate 6 rrm-profile wlan-rrm rts-cts-threshold 1400 rts-cts-mode rts-cts ap-group name ap-group1 radio 0 radio-2g-profile wlan-radio2g vap-profile wlan-net wlan 1 radio 1 radio-5g-profile wlan-radio5g vap-profile wlan-net wlan 1 ap-id 0 type-id 60 ap-mac 60de-4476-e360 ap-sn 210235554710CB000042 ap-name area_1 ap-group ap-group1 radio 0 channel 20mhz 6 eirp 127 calibrate auto-channel-select disable calibrate auto-txpower-select disable radio 1 channel 20mhz 149 eirp 127 calibrate auto-channel-select disable calibrate auto-txpower-select disable # return