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Example for Configuring Inter-AC Layer 2 Roaming
Service Requirements
Enterprise users can access the network through WLANs, which is the basic requirement of mobile office. Furthermore, users' services are not affected during roaming in the coverage area.
Networking Requirement
- AC networking mode: AC_1 and AC_2 in a mobility group
- DHCP deployment mode: AC_1 functions as a DHCP server to assign IP addresses to APs and STAs.
- Service data forwarding mode: tunnel forwarding
Figure 4-55 Networking for configuring inter-AC Layer 2 roaming
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Data Planning
Table 4-57 AC data planning
Item |
Data |
|---|---|
DHCP server |
AC_1 functions as a DHCP server to allocate IP addresses to APs and STAs. |
IP address pool for APs |
10.23.100.3-10.23.100.254/24 |
IP address pool for STAs |
10.23.101.3-10.23.101.254/24 |
AC's source interface address |
Source interface: VLANIF 100
|
AP group |
|
Regulatory domain profile |
|
SSID profile |
|
Security profile |
|
VAP profile |
|
Air scan profile |
|
2G radio profile |
|
5G radio profile |
|
Mobility group |
|
Configuration Roadmap
- Configure network interworking of the AC, APs, 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.
- Configure WLAN roaming on AC_1 and AC_2 to achieve inter-AC roaming.
During AP deployment, you can manually specify the working channels of the APs according to network planning or configure the radio calibration function to enable the APs to automatically select the optimal channels. This example configures the radio calibration function.
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 Switch_1 to VLAN 100. The default VLAN of GE0/0/1 is VLAN 100.
<HUAWEI> system-view [HUAWEI] sysname Switch_1 [Switch_1] vlan batch 100 [Switch_1] interface gigabitethernet 0/0/1 [Switch_1-GigabitEthernet0/0/1] port link-type trunk [Switch_1-GigabitEthernet0/0/1] port trunk pvid vlan 100 [Switch_1-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 [Switch_1-GigabitEthernet0/0/1] quit [Switch_1] interface gigabitethernet 0/0/2 [Switch_1-GigabitEthernet0/0/2] port link-type trunk [Switch_1-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 [Switch_1-GigabitEthernet0/0/2] quit
# Add GE0/0/1 and GE0/0/2 on Switch_2 to VLAN 100. The default VLAN of GE0/0/1 is VLAN 100.<HUAWEI> system-view [HUAWEI] sysname Switch_2 [Switch_2] vlan batch 100 [Switch_2] interface gigabitethernet 0/0/1 [Switch_2-GigabitEthernet0/0/1] port link-type trunk [Switch_2-GigabitEthernet0/0/1] port trunk pvid vlan 100 [Switch_2-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 [Switch_2-GigabitEthernet0/0/1] quit [Switch_2] interface gigabitethernet 0/0/2 [Switch_2-GigabitEthernet0/0/2] port link-type trunk [Switch_2-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 [Switch_2-GigabitEthernet0/0/2] quit
- Configure the AC to communicate with the network devices.# On AC_1, add GE0/0/1 to VLAN 100 and GE0/0/2 to VLAN 100 and VLAN 101.
<HUAWEI> system-view [HUAWEI] sysname AC_1 [AC_1] vlan batch 100 101 [AC_1] interface gigabitethernet 0/0/1 [AC_1-GigabitEthernet0/0/1] port link-type trunk [AC_1-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 [AC_1-GigabitEthernet0/0/1] quit [AC_1] interface gigabitethernet 0/0/2 [AC_1-GigabitEthernet0/0/2] port link-type trunk [AC_1-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 101 [AC_1-GigabitEthernet0/0/2] quit [AC_1] interface vlanif 100 [AC_1-Vlanif100] ip address 10.23.100.1 255.255.255.0 [AC_1-Vlanif100] quit [AC_1] interface vlanif 101 [AC_1-Vlanif101] ip address 10.23.101.1 255.255.255.0 [AC_1-Vlanif101] quit
# On AC_2, add GE0/0/1 to VLAN 100 and GE0/0/2 to VLAN 100 and VLAN 101.<HUAWEI> system-view [HUAWEI] sysname AC_2 [AC_2] vlan batch 100 101 [AC_2] interface gigabitethernet 0/0/1 [AC_2-GigabitEthernet0/0/1] port link-type trunk [AC_2-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 [AC_2-GigabitEthernet0/0/1] quit [AC_2] interface gigabitethernet 0/0/2 [AC_2-GigabitEthernet0/0/2] port link-type trunk [AC_2-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 101 [AC_2-GigabitEthernet0/0/2] quit [AC_2] interface vlanif 100 [AC_2-Vlanif100] ip address 10.23.100.2 255.255.255.0 [AC_2-Vlanif100] quit [AC_2] interface vlanif 101 [AC_2-Vlanif101] ip address 10.23.101.2 255.255.255.0 [AC_2-Vlanif101] quit
- Configure the DHCP servers to assign IP addresses to APs and STAs.# On AC_1, configure VLANIF 100 and VLANIF 101 to assign IP addresses to APs and STAs, respectively.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.
[AC_1] dhcp enable [AC_1] interface vlanif 100 [AC_1-Vlanif100] dhcp select interface [AC_1-Vlanif100] dhcp server excluded-ip-address 10.23.100.2 [AC_1-Vlanif100] quit [AC_1] interface vlanif 101 [AC_1-Vlanif101] dhcp select interface [AC_1-Vlanif101] dhcp server excluded-ip-address 10.23.101.2 [AC_1-Vlanif101] quit
- Configure the AP to go online on AC_1.# Create an AP group to which the APs with the same configuration can be added.
[AC_1] wlan [AC_1-wlan-view] ap-group name ap-group1 [AC_1-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_1-wlan-view] regulatory-domain-profile name default [AC_1-wlan-regulate-domain-default] country-code cn [AC_1-wlan-regulate-domain-default] quit [AC_1-wlan-view] ap-group name ap-group1 [AC_1-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_1-wlan-ap-group-ap-group1] quit [AC_1-wlan-view] quit
# Configure the AC's source interface.[AC_1] capwap source interface vlanif 100
# 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_1] wlan [AC_1-wlan-view] ap auth-mode mac-auth [AC_1-wlan-view] ap-id 0 ap-mac 60de-4476-e360 [AC_1-wlan-ap-0] ap-name area_1 Warning: This operation may cause AP reset. Continue? [Y/N]:y [AC_1-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_1-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_1-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 10.23.100.254 AP5030DN nor 0 10S - -------------------------------------------------------------------------------------------------- Total: 1
- Configure WLAN service parameters.# Create security profile wlan-net and set the security policy in the profile.
In this example, the security policy is set to WPA-WPA2+PSK+AES and password to a1234567. In actual situations, the security policy must be configured according to service requirements.
[AC_1-wlan-view] security-profile name wlan-net [AC_1-wlan-sec-prof-wlan-net] security wpa-wpa2 psk pass-phrase a1234567 aes [AC_1-wlan-sec-prof-wlan-net] quit
# Create SSID profile wlan-net and set the SSID name to wlan-net.[AC_1-wlan-view] ssid-profile name wlan-net [AC_1-wlan-ssid-prof-wlan-net] ssid wlan-net [AC_1-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_1-wlan-view] vap-profile name wlan-net [AC_1-wlan-vap-prof-wlan-net] forward-mode tunnel [AC_1-wlan-vap-prof-wlan-net] service-vlan vlan-id 101 [AC_1-wlan-vap-prof-wlan-net] security-profile wlan-net [AC_1-wlan-vap-prof-wlan-net] ssid-profile wlan-net [AC_1-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_1-wlan-view] ap-group name ap-group1 [AC_1-wlan-ap-group-ap-group1] vap-profile wlan-net wlan 1 radio 0 [AC_1-wlan-ap-group-ap-group1] vap-profile wlan-net wlan 1 radio 1 [AC_1-wlan-ap-group-ap-group1] quit
- Configure AP_2 to go online and basic WLAN services on AC_2.
Configure AP_2 to go online and basic WLAN services on AC_2 according to the configuration of AC_1. For details, see the configuration file of AC_2. The following lists configuration differences between AC_1 and AC_2.
- The AP with MAC address dcd2-fc04-b500 is added on AC_2. The AP name is set to area_2.
- Set channels and power for the AP radios.# Enable automatic channel and power calibration functions of the radio.
[AC_1-wlan-view] ap-group name ap-group1 [AC_1-wlan-ap-group-ap-group1] radio 0 [AC_1-wlan-group-radio-ap-group1/0] calibrate auto-channel-select enable [AC_1-wlan-group-radio-ap-group1/0] calibrate auto-txpower-select enable [AC_1-wlan-group-radio-ap-group1/0] quit [AC_1-wlan-ap-group-ap-group1] radio 1 [AC_1-wlan-group-radio-ap-group1/1] calibrate auto-channel-select enable [AC_1-wlan-group-radio-ap-group1/1] calibrate auto-txpower-select enable [AC_1-wlan-group-radio-ap-group1/1] quit [AC_1-wlan-ap-group-ap-group1] quit
# Configure a calibration channel set in the regulatory domain profile.[AC-wlan-view] regulatory-domain-profile name default [AC_1-wlan-regulate-domain-default] dca-channel 2.4g bandwidth 20mhz [AC_1-wlan-regulate-domain-default] dca-channel 2.4g channel-set 1,6,11 [AC_1-wlan-regulate-domain-default] dca-channel 5g bandwidth 20mhz [AC_1-wlan-regulate-domain-default] dca-channel 5g channel-set 149,153,157,161 [AC_1-wlan-regulate-domain-default] quit
# Create the air scan profile wlan-airscan and configure the scan channel set, scan interval, and scan duration. By default, an air scan channel set contains all channels supported by the corresponding country code of an AP.
[AC-wlan-view] air-scan-profile name wlan-airscan [AC_1-wlan-air-scan-prof-wlan-airscan] scan-channel-set dca-channel [AC_1-wlan-air-scan-prof-wlan-airscan] scan-period 60 [AC_1-wlan-air-scan-prof-wlan-airscan] scan-interval 60000 [AC_1-wlan-air-scan-prof-wlan-airscan] quit
# Create the 2G radio profile wlan-radio2g and bind the air scan profile wlan-airscan to the 2G radio profile.
[AC_1-wlan-view] radio-2g-profile name wlan-radio2g [AC_1-wlan-radio-2g-prof-wlan-radio2g] air-scan-profile wlan-airscan [AC_1-wlan-radio-2g-prof-wlan-radio2g] quit
# Create the 5G radio profile wlan-radio5g and bind the air scan profile wlan-airscan to the 5G radio profile.
[AC_1-wlan-view] radio-5g-profile name wlan-radio5g [AC_1-wlan-radio-5g-prof-wlan-radio5g] air-scan-profile wlan-airscan [AC_1-wlan-radio-5g-prof-wlan-radio5g] quit
# Bind the 5G radio profile wlan-radio5g and 2G radio profile wlan-radio2g to the AP group ap-group1.
[AC_1-wlan-view] ap-group name ap-group1 [AC_1-wlan-ap-group-ap-group1] radio-5g-profile wlan-radio5g radio 1 [AC_1-wlan-ap-group-ap-group1] radio-2g-profile wlan-radio2g radio 0 [AC_1-wlan-ap-group-ap-group1] quit
# Set the radio calibration mode to manual and trigger radio calibration.
[AC_1-wlan-view] calibrate enable manual [AC_1-wlan-view] calibrate manual startup
# Radio calibration stops one hour after the radio calibration is manually triggered. Set the radio calibration mode to scheduled. Configure the APs to perform radio calibration in off-peak hours, for example, between 00:00 am and 06:00 am.[AC_1-wlan-view] calibrate enable schedule time 03:00:00
- Configure WLAN roaming on AC_1.
# Create a mobility group on AC_1, and add AC_1 and AC_2 to the mobility group.
[AC_1-wlan-view] mobility-group name mobility [AC_1-mc-mg-mobility] member ip-address 10.23.100.1 [AC_1-mc-mg-mobility] member ip-address 10.23.100.2 [AC_1-mc-mg-mobility] quit
- Configure WLAN roaming on AC_2.
# Create a mobility group on AC_2, and add AC_1 and AC_2 to the mobility group.
[AC_2-wlan-view] mobility-group name mobility [AC_2-mc-mg-mobility] member ip-address 10.23.100.1 [AC_2-mc-mg-mobility] member ip-address 10.23.100.2 [AC_2-mc-mg-mobility] quit
- Verify the configuration.# The ACs automatically deliver WLAN service configuration to the APs. After the service configuration is complete, run the display vap ssid wlan-net command on AC_1 and AC_2 to check VAP information. If Status in the command output is displayed as ON, the VAPs have been successfully created on AP radios.
[AC_1-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
[AC_2-wlan-view] display vap ssid wlan-net WID : WLAN ID -------------------------------------------------------------------------------------- AP ID AP name RfID WID BSSID Status Auth type STA SSID -------------------------------------------------------------------------------------- 1 area_2 0 1 DCD2-FC04-B500 ON WPA/WPA2-PSK 0 wlan-net 1 area_2 1 1 DCD2-FC04-B510 ON WPA/WPA2-PSK 0 wlan-net ------------------------------------------------------------------------------------- Total: 2
# Run the display mobility-group name mobility command on AC_1 to check the state of AC_1 and AC_2 in the mobility group. If the State field is displayed as normal, AC_1 and AC_2 are in normal state.[AC_1-wlan-view] display mobility-group name mobility -------------------------------------------------------------------------------- State IP address Description -------------------------------------------------------------------------------- normal 10.23.100.1 - normal 10.23.100.2 - -------------------------------------------------------------------------------- Total: 2
# In the coverage area of AP_1, connect the STA to the wireless network with SSID wlan-net and enter the password a1234567. After the STA successfully associates with the network, run the display station ssid wlan-net command on AC_1. The command output shows that the STA with MAC address e019-1dc7-1e08 has associated with AP_1.[AC_1-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 -57 101 10.23.101.254 ------------------------------------------------------------------------------------ Total: 1 2.4G: 0 5G: 1
# When the STA moves from the coverage area of AP_1 to that of AP_2, run the display station ssid wlan-net command on AC_2. The command output shows that the STA has associated with AP_2.[AC_2-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 1 area_2 1/1 5G 11n 46/59 -58 101 10.23.101.254 ------------------------------------------------------------------------------------ Total: 1 2.4G: 0 5G: 1
# Run the display station roam-track sta-mac e019-1dc7-1e08 command on AC_2 to check the STA roaming track.[AC_2-wlan-view] display station roam-track sta-mac e019-1dc7-1e08 Access SSID:wlan-net Rx/Tx: link receive rate/link transmit rate(Mbps) c:PMK Cache Roam r:802.11r Roam s:Same Frequency Network ------------------------------------------------------------------------------ L2/L3 AC IP AP name Radio ID BSSID TIME In/Out RSSI Out Rx/Tx ------------------------------------------------------------------------------ -- 10.23.100.1 area_1 1 60de-4476-e360 2015/02/09 16:11:51 -57/-57 22/3 L2 10.23.100.2 area_2 1 dcd2-fc04-b500 2015/02/09 16:13:53 -58/- -/- ------------------------------------------------------------------------------ Number: 1
Configuration Files
Switch_1 configuration file
# sysname Switch_1 # vlan batch 100 # interface GigabitEthernet0/0/1 port link-type trunk port trunk pvid vlan 100 port trunk allow-pass vlan 100 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 # return
Switch_2 configuration file
# sysname Switch_2 # vlan batch 100 # interface GigabitEthernet0/0/1 port link-type trunk port trunk pvid vlan 100 port trunk allow-pass vlan 100 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 # return
AC_1 configuration file
# sysname AC_1 # vlan batch 100 to 101 # dhcp enable # interface Vlanif100 ip address 10.23.100.1 255.255.255.0 dhcp select interface dhcp server excluded-ip-address 10.23.100.2 # interface Vlanif101 ip address 10.23.101.1 255.255.255.0 dhcp select interface dhcp server excluded-ip-address 10.23.101.2 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 100 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 to 101 # capwap source interface vlanif100 # wlan security-profile name wlan-net security wpa2 psk pass-phrase %^%#]:krYrz_r<ee}|Cq@9V(W{ZD$"\-R-HD_y.4#U4,%^%# aes ssid-profile name wlan-net ssid wlan-net vap-profile name wlan-net forward-mode tunnel service-vlan vlan-id 101 ssid-profile wlan-net security-profile wlan-net regulatory-domain-profile name default dca-channel 5g channel-set 149,153,157,161 mobility-group name mobility member ip-address 10.23.100.1 member ip-address 10.23.100.2 air-scan-profile name wlan-airscan scan-period 60 scan-interval 60000 radio-2g-profile name wlan-radio2g air-scan-profile wlan-airscan radio-5g-profile name wlan-radio5g air-scan-profile wlan-airscan ap-group name ap-group1 radio 0 radio-2g-profile wlan-radio2g vap-profile wlan-net wlan 1 radio 1 radio-5g-profile wlan-radio5g vap-profile wlan-net wlan 1 ap-id 0 type-id 35 ap-mac 60de-4476-e360 ap-sn 210235554710CB000042 ap-name area_1 ap-group ap-group1 # return
AC_2 configuration file
# sysname AC_2 # vlan batch 100 to 101 # interface Vlanif100 ip address 10.23.100.2 255.255.255.0 # interface Vlanif101 ip address 10.23.101.2 255.255.255.0 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 100 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 101 # capwap source interface vlanif100 # wlan security-profile name wlan-net security wpa2 psk pass-phrase %^%#]:krYrz_r<ee}|Cq@9V(W{ZD$"\-R-HD_y.4#U4,%^%# aes ssid-profile name wlan-net ssid wlan-net vap-profile name wlan-net forward-mode tunnel service-vlan vlan-id 101 ssid-profile wlan-net security-profile wlan-net regulatory-domain-profile name default dca-channel 5g channel-set 149,153,157,161 mobility-group name mobility member ip-address 10.23.100.1 member ip-address 10.23.100.2 air-scan-profile name wlan-airscan scan-channel-set dca-channel radio-2g-profile name wlan-radio2g air-scan-profile wlan-airscan radio-5g-profile name wlan-radio5g air-scan-profile wlan-airscan ap-group name ap-group1 radio 0 radio-2g-profile wlan-radio2g vap-profile wlan-net wlan 1 calibrate auto-channel-select disable calibrate auto-txpower-select disable radio 1 radio-5g-profile wlan-radio5g vap-profile wlan-net wlan 1 calibrate auto-channel-select disable calibrate auto-txpower-select disable ap-id 1 type-id 35 ap-mac dcd2-fc04-b500 ap-sn 210235554710CB000078 ap-name area_2 ap-group ap-group1 # return