我們使用以下 1Gbit/s 無線電連結設定：位置 A：
- 具有 1Gbits/s sym 的網際網路閘道。纖維
- 我們的大多數伺服器包括 dhcp、dns、檔案伺服器 (smb)、voip 伺服器、交換伺服器
- 55 個客戶/用戶
- 定向無線電中繼 A (Lightpointe AireLink 60 SX) - 1Gbits/s
地點B：
- 一台檔案伺服器 (smb)
- 30 個客戶/用戶
- 定向無線電中繼 B (Lightpointe AireLink 60 SX) - 1Gbits/s
A 點和 B 點之間的距離為 177 公尺。兩個位置共用一個子網路：用戶端和伺服器使用 192.168.0.0/24，VoIP 電話位於子網路 10.6.3.0/24 中（也與兩個位置共用）。因此，兩個位置之間沒有路由，並且無線電鏈路充當橋樑。
定向無線電中繼A的設定：
Link Status: UP
Mode: Data
RSSI, dBm: -46
RSSI Alarm Thrshld, dBm: -60
RSSI Alarm Clear, dBm: -50
RF Link: high
TX RF Band, GHz: 62.5
RX RF Band, GHz: 59.5
TX Power, dBm: -7
Distance: Very short
ACM: Enabled
Modulation: 16QAM 5/8
TX Lock: normal lock
RX Lock: normal lock
Modem Lock: locked
定向無線電中繼B的設定：
Link Status: UP
Mode: Data
RSSI, dBm: -49
RSSI Alarm Thrshld, dBm: -60
RSSI Alarm Clear, dBm: -50
RF Link: low
TX RF Band, GHz: 59.5
RX RF Band, GHz: 62.5
TX Power, dBm: -4
Distance: Very short
ACM: Enabled
Modulation: 16QAM 5/8
TX Lock: normal lock
RX Lock: normal lock
Modem Lock: locked
RF Link RX 錯誤導向無線電繼電器 A：0 RF Link RX 錯誤定向無線電繼電器 B：0
我們在位置 B 遇到以下問題：
- VoIP 音訊中斷（大多數每次只有一個方向，每個方向約 3 秒）
- smb 吞吐量有時會下降到 5 Mbit/s 甚至更低
- 發送郵件（交換伺服器）有時非常緩慢
- 網路連線速度慢
檔案傳輸速率降至零且檔案傳輸中止並返回 0x8007003B（位置 A->B）：
把它們加起來：似乎有什麼原因導致吞吐量大幅下降，但我們不知道這裡發生了什麼。我們安裝了兩台「中間人」伺服器，每個伺服器都有兩個橋接乙太網路端口，用於在無線電鏈路資料端口和將其連接到本地網路的交換器端口之間的兩個位置ntopng收集一些資料。tshark
從位置 A 的客戶端存取位置 A 的伺服器以及從位置 B 的客戶端存取位置 B 的伺服器沒有問題。
- 伺服器位置-a = 192.168.0.149
- 伺服器位置-b = 192.168.0.242
iperf 顯示出良好的數據速率：
user@location-a:~$ iperf -c server.location-b -i 2 -t 20
------------------------------------------------------------
Client connecting to server.location-b, TCP port 5001
TCP window size: 512 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.149 port 63378 connected with 192.168.0.242 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 2.0 sec 198 MBytes 832 Mbits/sec
[ 3] 2.0- 4.0 sec 195 MBytes 817 Mbits/sec
[ 3] 4.0- 6.0 sec 198 MBytes 831 Mbits/sec
[ 3] 6.0- 8.0 sec 199 MBytes 836 Mbits/sec
[ 3] 8.0-10.0 sec 165 MBytes 692 Mbits/sec
[ 3] 10.0-12.0 sec 198 MBytes 829 Mbits/sec
[ 3] 12.0-14.0 sec 195 MBytes 817 Mbits/sec
[ 3] 14.0-16.0 sec 193 MBytes 810 Mbits/sec
[ 3] 16.0-18.0 sec 200 MBytes 838 Mbits/sec
[ 3] 18.0-20.0 sec 199 MBytes 833 Mbits/sec
[ 3] 0.0-20.0 sec 1.89 GBytes 814 Mbits/sec
兩個方向 --tradeoff (-r)
user@location-a:~$ iperf -c server.location-b -i 2 -t 20 -r
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 1.00 MByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to server.location-b, TCP port 5001
TCP window size: 512 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.0.149 port 49535 connected with 192.168.0.242 port 5001
[ ID] Interval Transfer Bandwidth
[ 4] 0.0- 2.0 sec 191 MBytes 801 Mbits/sec
[ 4] 2.0- 4.0 sec 196 MBytes 824 Mbits/sec
[ 4] 4.0- 6.0 sec 196 MBytes 822 Mbits/sec
[ 4] 6.0- 8.0 sec 193 MBytes 809 Mbits/sec
[ 4] 8.0-10.0 sec 196 MBytes 821 Mbits/sec
[ 4] 10.0-12.0 sec 187 MBytes 783 Mbits/sec
[ 4] 12.0-14.0 sec 164 MBytes 690 Mbits/sec
[ 4] 14.0-16.0 sec 166 MBytes 697 Mbits/sec
[ 4] 16.0-18.0 sec 191 MBytes 803 Mbits/sec
[ 4] 18.0-20.0 sec 196 MBytes 820 Mbits/sec
[ 4] 0.0-20.0 sec 1.83 GBytes 787 Mbits/sec
[ 4] local 192.168.0.149 port 5001 connected with 192.168.0.242 port 45775
[ 4] 0.0- 2.0 sec 221 MBytes 928 Mbits/sec
[ 4] 2.0- 4.0 sec 221 MBytes 929 Mbits/sec
[ 4] 4.0- 6.0 sec 222 MBytes 933 Mbits/sec
[ 4] 6.0- 8.0 sec 222 MBytes 933 Mbits/sec
[ 4] 8.0-10.0 sec 222 MBytes 932 Mbits/sec
[ 4] 10.0-12.0 sec 188 MBytes 789 Mbits/sec
[ 4] 12.0-14.0 sec 223 MBytes 935 Mbits/sec
[ 4] 14.0-16.0 sec 222 MBytes 932 Mbits/sec
[ 4] 16.0-18.0 sec 223 MBytes 934 Mbits/sec
[ 4] 18.0-20.0 sec 222 MBytes 933 Mbits/sec
[ 4] 0.0-20.0 sec 2.14 GBytes 918 Mbits/sec
反轉 iperf 伺服器和客戶端：
user@location-b:~# iperf -c server.location-a -i 2 -t 20
------------------------------------------------------------
Client connecting to server.location-a, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.242 port 45778 connected with 192.168.0.149 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 2.0 sec 220 MBytes 921 Mbits/sec
[ 3] 2.0- 4.0 sec 218 MBytes 916 Mbits/sec
[ 3] 4.0- 6.0 sec 217 MBytes 910 Mbits/sec
[ 3] 6.0- 8.0 sec 221 MBytes 926 Mbits/sec
[ 3] 8.0-10.0 sec 213 MBytes 892 Mbits/sec
[ 3] 10.0-12.0 sec 188 MBytes 787 Mbits/sec
[ 3] 12.0-14.0 sec 218 MBytes 916 Mbits/sec
[ 3] 14.0-16.0 sec 218 MBytes 916 Mbits/sec
[ 3] 16.0-18.0 sec 219 MBytes 919 Mbits/sec
[ 3] 18.0-20.0 sec 223 MBytes 937 Mbits/sec
[ 3] 0.0-20.0 sec 2.10 GBytes 904 Mbits/sec
使用 -d 進行雙重測試：
user@location-b:~# iperf -c server.location-a -i 2 -t 10 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to server.location-a, TCP port 5001
TCP window size: 255 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.0.242 port 45784 connected with 192.168.0.149 port 5001
[ 4] local 192.168.0.242 port 5001 connected with 192.168.0.149 port 52423
[ ID] Interval Transfer Bandwidth
[ 5] 0.0- 2.0 sec 210 MBytes 882 Mbits/sec
[ 4] 0.0- 2.0 sec 45.7 MBytes 192 Mbits/sec
[ 5] 2.0- 4.0 sec 172 MBytes 722 Mbits/sec
[ 4] 2.0- 4.0 sec 50.8 MBytes 213 Mbits/sec
[ 5] 4.0- 6.0 sec 205 MBytes 859 Mbits/sec
[ 4] 4.0- 6.0 sec 65.5 MBytes 275 Mbits/sec
[ 5] 6.0- 8.0 sec 215 MBytes 901 Mbits/sec
[ 4] 6.0- 8.0 sec 73.0 MBytes 306 Mbits/sec
[ 5] 8.0-10.0 sec 223 MBytes 934 Mbits/sec
[ 5] 0.0-10.0 sec 1.00 GBytes 860 Mbits/sec
[ 4] 8.0-10.0 sec 55.0 MBytes 231 Mbits/sec
[ 4] 0.0-10.0 sec 290 MBytes 243 Mbits/sec
iperf 兩個方向同時啟動 smb 檔案傳輸位置 A -> B（從位置 B -> A 啟動 smb 檔案傳輸沒有問題：
user@location-b:~# iperf -c server.location-a -i 1 -t 30 -r
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to server.location-a, TCP port 5001
TCP window size: 238 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.0.242 port 45787 connected with 192.168.0.149 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0- 1.0 sec 111 MBytes 934 Mbits/sec
[ 5] 1.0- 2.0 sec 109 MBytes 913 Mbits/sec
[ 5] 2.0- 3.0 sec 111 MBytes 928 Mbits/sec
[ 5] 3.0- 4.0 sec 111 MBytes 932 Mbits/sec
[ 5] 4.0- 5.0 sec 111 MBytes 928 Mbits/sec
[ 5] 5.0- 6.0 sec 101 MBytes 844 Mbits/sec
[ 5] 6.0- 7.0 sec 73.8 MBytes 619 Mbits/sec
[ 5] 7.0- 8.0 sec 111 MBytes 929 Mbits/sec
[ 5] 8.0- 9.0 sec 109 MBytes 916 Mbits/sec
[ 5] 9.0-10.0 sec 112 MBytes 938 Mbits/sec
[ 5] 10.0-11.0 sec 109 MBytes 918 Mbits/sec
[ 5] 11.0-12.0 sec 111 MBytes 933 Mbits/sec
[ 5] 12.0-13.0 sec 106 MBytes 891 Mbits/sec
[ 5] 13.0-14.0 sec 85.8 MBytes 719 Mbits/sec
[ 5] 14.0-15.0 sec 112 MBytes 935 Mbits/sec
[ 5] 15.0-16.0 sec 111 MBytes 934 Mbits/sec
[ 5] 16.0-17.0 sec 110 MBytes 924 Mbits/sec
[ 5] 17.0-18.0 sec 112 MBytes 937 Mbits/sec
[ 5] 18.0-19.0 sec 112 MBytes 940 Mbits/sec
[ 5] 19.0-20.0 sec 112 MBytes 935 Mbits/sec
[ 5] 20.0-21.0 sec 111 MBytes 928 Mbits/sec
[ 5] 21.0-22.0 sec 110 MBytes 923 Mbits/sec
[ 5] 22.0-23.0 sec 79.1 MBytes 664 Mbits/sec
[ 5] 23.0-24.0 sec 112 MBytes 937 Mbits/sec
[ 5] 24.0-25.0 sec 112 MBytes 936 Mbits/sec
[ 5] 25.0-26.0 sec 111 MBytes 934 Mbits/sec
[ 5] 26.0-27.0 sec 112 MBytes 937 Mbits/sec
[ 5] 27.0-28.0 sec 111 MBytes 928 Mbits/sec
[ 5] 28.0-29.0 sec 112 MBytes 938 Mbits/sec
[ 5] 29.0-30.0 sec 112 MBytes 941 Mbits/sec
[ 5] 0.0-30.0 sec 3.15 GBytes 901 Mbits/sec
[ 4] local 192.168.0.242 port 5001 connected with 192.168.0.149 port 52898
[ 4] 0.0- 1.0 sec 104 MBytes 872 Mbits/sec
[ 4] 1.0- 2.0 sec 103 MBytes 867 Mbits/sec
[ 4] 2.0- 3.0 sec 97.9 MBytes 822 Mbits/sec
[ 4] 3.0- 4.0 sec 95.9 MBytes 804 Mbits/sec
[ 4] 4.0- 5.0 sec 101 MBytes 851 Mbits/sec
[ 4] 5.0- 6.0 sec 102 MBytes 860 Mbits/sec
[ 4] 6.0- 7.0 sec 103 MBytes 867 Mbits/sec
[ 4] 7.0- 8.0 sec 103 MBytes 868 Mbits/sec
[ 4] 8.0- 9.0 sec 50.0 MBytes 419 Mbits/sec
[ 4] 9.0-10.0 sec 14.8 MBytes 124 Mbits/sec
[ 4] 10.0-11.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 11.0-12.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 12.0-13.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 13.0-14.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 14.0-15.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 15.0-16.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 16.0-17.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 17.0-18.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 18.0-19.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 19.0-20.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 20.0-21.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 21.0-22.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 22.0-23.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 23.0-24.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 24.0-25.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 25.0-26.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 26.0-27.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 27.0-28.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] 0.0-28.9 sec 876 MBytes 255 Mbits/sec
答案1
多路徑反射 ?嘗試將這對偏移一點點，我不知道使用哪種調製，但我想在 FHSS 風格中，如果沒有硬體警告，您可能會遇到很多麻煩