Common WLAN Coverage
This section describes the recommended configurations that need to be supplemented for common WLAN coverage in specific scenarios. For details about how to configure common WLAN coverage, see Campus Network Connectivity Deployment. User authentication modes are described in Wired and Wireless User Access Authentication Deployment.
Device Requirements and Versions
Location |
Device Requirement |
Device Used in This Example |
Version Used in This Example |
|---|---|---|---|
AC |
- |
AC6605 |
V200R019C10 |
AP |
- |
AP6050DN |
V200R019C00 |
Traffic Optimization in Large Broadcast Domain Scenarios
On an enterprise campus network, a single large subnet is usually designed. Such a single large subnet simplifies VLAN configuration, roaming configuration, and fault location. However, due to the use of a large broadcast domain on this subnet, a large number of packets are replicated and sent, causing high CPU usage.
To lower the CPU usage and support large broadcast domain scenarios, you can leverage various methods such as broadcast-to-unicast conversion, unknown unicast traffic suppression, and rate limiting for multicast and broadcast packets on APs.
# Enable the function of sending mDNS unicast response packets so that the AC functions as the mDNS gateway to respond to mDNS service request packets using unicast packets, reducing the packet duplication load on the AC. This function is disabled by default. You are advised to enable it. This configuration is available only for standalone ACs but not switches that support the native AC function.
<AC> system-view [AC] mdns unicast-reply enable
# Enable the IGMP snooping function and the function of discarding unknown multicast flows in a VLAN. IGMP snooping runs on a Layer 2 device and analyzes IGMP messages exchanged between a Layer 3 device and hosts to create and maintain a Layer 2 multicast forwarding table. Based on this table, the Layer 2 device forwards multicast packets at the data link layer.
<AC> system-view [AC] wlan [AC-wlan-view] traffic-profile name traff [AC-wlan-traffic-prof-traff] igmp-snooping enable [AC-wlan-traffic-prof-traff] quit [AC-wlan-view] quit [AC] vlan 10 [AC-vlan10] multicast drop-unknown
# Enable the function of converting ARP, ND, and DHCP packets to unicast packets. This function is enabled by default. You are advised to retain the default setting.
<AC> system-view [AC] wlan [AC-wlan-view] traffic-profile name traff [AC-wlan-traffic-prof-traff] traffic-optimize bcmc unicast-send arp nd dhcp
# Enable the function of suppressing ARP, ND, and DHCP packets. Broadcast or multicast packets that failed to be converted to unicast packets are then discarded on the air interface. This function is enabled by default. You are advised to retain the default setting.
<AC> system-view [AC] wlan [AC-wlan-view] traffic-profile name traff [AC-wlan-traffic-prof-traff] traffic-optimize bcmc unicast-send mismatch-action drop
Traffic Optimization in VR Scenarios
When an AP is connected to a VR device, packet loss and retransmission have a great impact on user experience. Therefore, you can set the service guarantee mode to reliability first. That is, when the VR throughput requirement is met, the air interface rate can be lowered properly to reduce jitter and delay caused by packet loss and retransmission, improving user experience. It is recommended that the service guarantee mode be set to reliability-first in VR gaming scenarios and to performance first in VR video scenarios.
# Set the service guarantee mode to reliability-first. The default service guarantee mode is performance-first.
<AC> system-view [AC] wlan [AC-wlan-view] ssid-profile name ssid1 [AC-wlan-ssid-prof-ssid1] service-guarantee reliability-first