WX3520H+WA5320-SI组网，用户体验差，丢包严重

从AC上看到客户端信息如下：

MAC address                       : 90dd-5d82-1088
 IPv4 address                      : 10.9.99.5
 IPv6 address                      : N/A
 Username                          : xxx\xxxxxxx
 AID                               : 8
 AP ID                             : 71
 AP name                           : a6-ap/test
 Radio ID                          : 1
 SSID                              : S-xxxxxxxx
 BSSID                             : 4ce9-e408-b443
 VLAN ID                           : 1201
 Sleep count                       : 572
 Wireless mode                     : 802.11ac
 Channel bandwidth                 : 80MHz
 SM power save                     : Disabled
 Short GI for 20MHz                : Supported
 Short GI for 40MHz                : Supported
 Short GI for 80MHz                : Supported
 Short GI for 160/80+80MHz         : Not supported
 STBC RX capability                : Not supported
 STBC TX capability                : Not supported
 LDPC RX capability                : Not supported
 SU beamformee capability          : Supported
 MU beamformee capability          : Not supported
 Beamformee STS capability         : N/A
 Block Ack                         : TID 0  Both
                                     TID 1  In
 Supported VHT-MCS set             : NSS1 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
 Supported HT MCS set              : 0, 1, 2, 3, 4, 5, 6, 7,
                                     8, 9, 10, 11, 12, 13, 14,
                                     15
 Supported rates                   : 6, 9, 12, 18, 24, 36,
                                     48, 54 Mbps
 QoS mode                          : WMM
 Listen interval                   : 20
 RSSI                              : 39
 Rx/Tx rate                        : 6/6
 Authentication method             : Open system
 Security mode                     : RSN
 AKM mode                          : 802.1X
 Cipher suite                      : CCMP
 User authentication mode          : 802.1X
 Authorization ACL ID              : N/A
 Authorization user profile        : N/A
 Roam status                       : N/A
 Key derivation                    : SHA1
 PMF status                        : N/A
 Forwarding policy name            : N/A
 Online time                       : 0days 0hours 33minutes 25seconds
 FT status                         : Inactive

客户端到网关上丢包比较严重，在百分之10-15左右，延迟最高能到500以上，信号在-52左右，信噪比在35-42左右，前后最有没有金属物体