Why is the bridge (WDS) throughput in fat AP mode ofthe AP620-H low? |
Analysis methods: 1. Check whether the antenna interface is consistent with the connected radio interface. 2. Check whether directions of both antennas are aligned. 3. Check whether the signal RSSI reaches 50 or higher. 4. Check whether the bridging frequency band is 40 MHz. 5. Check whether the connection rate is 300 Mbit/s. 6. Check whether the MIMO antenna is correctly placed. Solution: 1. Use the confirmed latest version. 2. Check the RSSI to determine whether the antenna is connected to the proper radio interface. On the root-bridge, run show dot11 ass all to check whether the RSSI is increased. 3. Launch a throughput speed testing as adjusting the antenna direction until it reaches the best performance. 4. If the co-frequency interference exists and the channel needs to be changed, use the 802.11na channels 149, 153, 157, and 161. 5. Set the frequency band of the 802.11na channels to 40 MHz. On the non-root-bridge, configure the corresponding radio interface. interface dot11radio 1/0 radio-mode 11na_ht40plus chan-width 40 channel 149 On the non-root-bridge, run show dot11 wireless 1/0 to check whether the frequency band is 40 MHz. non-root#show dot11 wireless 1/0 WLAN ID: 0 Network Name (SSID): <NULL> Interface.................... Dot11radio 1/0(intfcb 0x8fae800, wlan 0x8faec00) VID.......................... 1 Mac Address.................. 001b.b120.3d0e Operation Mode............... Access Point 802.11 State................. Associated Beacon Period................ 100 RTS Threshold................ 2347 Fragement Threshold.......... 2346 Radio Mode................... 11na_ht40minus Channel...................... 5765(153) Noise Floor.................. -101 dBm Channel width................ 40Mhz Maximum Regulatory Tx Power.. 30 dBm Maximum Tx Power............. 15 dBm Minimum Tx Power............. 15 dBm Tx power limit............... 60 dBm Current Tx Power Level....... 17 dBm(Auto) Protection Mode.............. 1(1-CTS/S, 2-RTS/CTS) A-MPDU Max Length............ 0 Subframe Max Length.......... 0 A-MSDU Max Length............ 0 On the root-bridge, run show dot11 ass all to check whether the RSSI and rate are within the normal range. root#show dot11 associations all INTF-IDX ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ ERP STATE CAPS HTCAPS 0 00:1b:b1:20:3d:0e 1 153 300M 66 120 10 27824 0x0 0x22b Es WPS 6. On the same AP, the antenna placement direction and the antenna polarization direction should be on the contrary. Otherwise, the MIMO antennas mutually interference each other. Three antennas of the same AP should be separated with a minimum distance of 20 cm. For example, when the outdoor pot antenna is polarized vertically, the antenna should be placed horizontally. |
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