Example for Configuring Layer 3 Direct Forwarding in Inline Mode

WLAN V200R019C00 Typical Configuration Examples

Rate and give feedback:

Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).

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. A VLAN pool is configured as service VLANs to prevent IP address insufficiency or waste. Furthermore, this measure can reduce the number of users in each VLAN and the size of the broadcast domain.

Networking Requirements

AC networking mode: Layer 3 networking in inline 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

Figure 5-19 Networking for configuring Layer 3 direct forwarding in inline mode

Data Planning

Table 5-19 AC data planning

Item	Data
Management VLAN for APs	VLAN 10 and VLAN 100
Service VLAN for STAs	VLAN pool Name: sta-pool VLANs in the VLAN pool: VLAN 101 and VLAN 102
DHCP server	The AC functions as a DHCP server to assign IP addresses to APs. SwitchB functions as a DHCP server to assign IP addresses to STAs. The default gateway IP addresses of STAs are 10.23.101.2 and 10.23.102.2.
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	Name: ap-group1 Referenced profiles: VAP profile wlan-net, 2G radio profile wlan-radio2g, and 5G radio profile wlan-radio5g
Regulatory domain profile	Name: default Country code: CN Calibration channel set: calibration bandwidth and channels for 2.4 GHz and 5 GHz radios
SSID profile	Name: wlan-net SSID name: wlan-net
Security profile	Name: wlan-net Security policy: WPA-WPA2+PSK+AES Password: a1234567
VAP profile	Name: wlan-net Forwarding mode: direct forwarding Service VLAN: VLANs in the VLAN pool Referenced profiles: SSID profile wlan-net and security profile wlan-net
Air scan profile	Name: wlan-airscan Probe channel set: calibration channels Air scan interval: 60000 ms Air scan period: 60 ms
2G radio profile	Name: wlan-radio2g Referenced profiles: air scan profile wlan-airscan
5G radio profile	Name: wlan-radio5g Referenced profiles: air scan profile wlan-airscan

Configuration Roadmap

The configuration roadmap is as follows:

Configure network interworking of the AC, APs, and other network devices.
Configure a VLAN pool for service VLANs.
Select Config Wizard to configure system parameters for the AC.
Select Config Wizard to configure the APs to go online on the AC.
Select Config Wizard to configure WLAN services on the AC.
Deliver the 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.
For details on how to configure traffic suppression, see How Do I Configure Multicast Packet Suppression to Reduce Impact of a Large Number of Low-Rate Multicast Packets on the Wireless Network?.
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 switches and router.

# Add GE0/0/1 and GE0/0/2 on SwitchA to VLAN 10, VLAN 101, and VLAN 102. The default VLAN of GE0/0/1 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

# Add GE0/0/1 on SwitchB to VLAN 10, VLAN 101, and VLAN 102, and GE0/0/2 to VLAN 100, 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 100 101 102
[SwitchB-GigabitEthernet0/0/2] 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 DHCP services 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

Configure system parameters for the AC.
1. Perform basic AC configurations.
  # Choose Configuration > Config Wizard > AC. The Basic AC Configuration page is displayed.
  
  # Set Country/Region based on actual situations. For example, set Country/Region to China. Set System time to Manual and Date and time to PC.
  
  # Click Next. The Port Configuration page is displayed.
2. Configure interfaces.
  
  If the AC and APs are directly connected, set the default VLAN of the interfaces connected to the APs to management VLAN 100.
  
  # Select GigabitEthernet0/0/1 and expand Batch Modify. Set Interface type to Trunk and add GigabitEthernet0/0/1 to VLANs 100, 101, and 102.
  
  # Click Apply. In the dialog box that is displayed, click OK.
  
  # Deselect GigabitEthernet0/0/1 and then select GigabitEthernet0/0/2. Add GigabitEthernet0/0/2 to VLAN 101 and VLAN 102 in the same way.
  
  # Click Next. The Network Interconnection Configuration page is displayed.
3. Configure network connectivity.
  # Click Create under Interface Configuration. The Create Interface Configuration page is displayed.
  
  # Set the IP address of VLANIF 100 to 10.23.100.1/24.
  
  # Click OK.
  # Click Create under DHCPv4 Address Pool List and configure a global address pool named huawei.
  - IP address pool subnet: 10.23.10.0
  - Option 43: ASCII, IP address of 10.23.100.1
  - Gateway IP address: 10.23.10.1
  # Click OK.
  
  # Under Static Route Table, click Create. The Create Static Route Table page is displayed.
  
  # Set Destination IP to 10.23.10.0, Subnet Mask to 24(255.255.255.0), and Next hop address to 10.23.100.2.
  
  # Click OK.
  
  # Click Next.
  
  # Click Next. The AC Source Address page is displayed.
4. Configure the source address for AC.
  # Set AC source address to VLANIF. Click the browse button and select Vlanif100.
  
  # Click Next. The Confirm Settings page is displayed.
5. Confirm the configuration.
  # Confirm the configuration and click Continue With AP Online.
Configure APs to go online.
1. Configure APs to go online.
  # Click Batch Import. The Batch Import page is displayed. Click to download an AP template file to your local computer.
  # Fill in the AP template file with AP information according to the following example. To add multiple APs, fill in the file with information of the APs.
  - AP MAC: 60de-4476-e360
  - AP SN: 210235419610CB002287
  - AP Name: area_1
  - AP Group: ap-group1
  If you set AP authentication mode to MAC address authentication, the AP's MAC address is mandatory and the AP's SN is optional.
  If you set AP authentication mode to SN authentication, the AP's SN is mandatory and the AP's MAC address is optional.
  
  You are advised to export the radio ID, AP channel, frequency bandwidth, and power planned on WLAN Planner to a .csv file, and then enter them in the AP template file. Set the longitude and latitude as required.
  # Click next to Import AP File, select the AP template file, and click Import.
  
  # On the page that displays the template import result, click OK.
  
  # Click Next. The Group APs page is displayed.
  
  # AP group information has been added in the AP template file. Click Next. The Confirm Configurations page is displayed.
2. Confirm the configuration.
  # Confirm the configuration and click Continue With Wireless Service Configuration.
Configure WLAN services.
# Click Create. The Basic Information page is displayed.

# Set the SSID name, forwarding mode, and service VLAN. Set Service VLAN to VLAN Pool. Click Create next to VLAN Pool. The Create VLAN Pool page is displayed.

# Set VLAN pool name to sta-pool and VLAN assignment mode to Hash. Add VLANs 101 and 102.

# Click OK. In the dialog box that is displayed, click OK.

# Click Next. The Security Authentication page is displayed.

# Set Security settings to Key (applicable to personnel networks), select the AES mode, and set the key.

# Click Next. The Access Control page is displayed.

# Set Binding the AP group to ap-group1.

# Click Finish.
Enable radio calibration to allow APs to automatically select the optimal channels and power.
1. Enable automatic channel and power calibration functions of radios.
  
  Radio 0 is used as an example. The configuration for other radios is similar and will not be mentioned here.
  
  # Choose Configuration > AP Config > AP Group > AP Group.
  
  # Click the AP group name ap-group1 in the AP group list. Choose Radio Management > Radio 0. The Radio 0 Settings(2.4G) page is displayed.
  
  # On the Radio 0 Settings(2.4G) configuration page, enable automatic channel and power calibration.
  
  By default, the global automatic channel and power calibration functions are enabled. Therefore, select Follow. If the global automatic channel and power calibration functions are disabled, choose Configuration > AP Config > Radio Planning/ Calibration > Radio Calibration Configuration, and set Calibration to ON.
  
  # Click Apply. In the dialog box that is displayed, click OK.
2. Create radio profiles.
  
  The following example configures a 2G radio profile. The configuration of a 5G radio profile is similar.
  
  # Choose Radio 0 > 2G Radio Profile. The 2G Radio Profile page is displayed.
  
  # Click Create. On the Create 2G Radio Profile page that is displayed, enter the profile name wlan-radio2g and click OK. The 2G radio profile configuration page is displayed.
  
  # Click Apply. In the dialog box that is displayed, click OK.
3. Create an air scan profile and configure the probe channel set, scan interval, and scan duration.
  # Click next to 2G Radio Profile. Select Air Scan Profile. The Air Scan Profile page is displayed. Click Create. On the Create Air Scan Profile page that is displayed, enter the profile name wlan-airscan and click OK. The air scan profile configuration page is displayed.
  
  # Enable scanning, and configure the probe channel set, scan interval, and scan duration.
  
  # Click Apply. In the dialog box that is displayed, click OK.
4. Enable radio calibration.
  # Choose Configuration > AP Config > Radio Planning/ Calibration > Radio Planning. The Radio Planning page is displayed.
  
  # Click Immediate Calibration. In the dialog box that is displayed, click OK.
  
  # Choose Monitoring > Radio. In Radio List, check the channel and power of the radio. In this example, three APs have gone online on the AC, and the list shows that AP channels have been automatically assigned through the radio calibration function.
  
  # Radio calibration stops one hour after the radio calibration is manually triggered.
  
  # Choose Configuration > AP Config > Radio Planning/ Calibration > Radio Calibration Configuration. The Radio Calibration Configuration page is displayed. The Radio Calibration Configuration page is displayed. On the Radio Calibration Configuration page, set Triggering condition to Scheduled and set the start time to 3:00 am.
  
  # Click Apply. In the dialog box that is displayed, click OK.
Verify the configuration.
1. Choose Monitoring > SSID > VAP. In VAP List, check VAP status. You can see that the status of the VAP in wlan-net is normal.
2. The WLAN with the SSID wlan-net is available.
3. The STA can associate with the WLAN and obtain an IP address 10.23.101.x/24, and its gateway address is 10.23.101.2.
4. Choose Monitoring > User > User List. All online users are displayed in User List. You can use the filtering function to filter the display results. For example, click next to SSID. Set the filtering condition, enter wlan-net, and click OK. Users connected to the SSID wlan-net are displayed. Multi-column filtering is supported to accurately query online users.