Autonomous 1572 in Bridge Backhaul

[andrewdours]

Hello All,

Thanks to anyone who can respond.  

I just set installed 2 autonomous 1572E APs as backhaul bridges only.  They are about 600 ft apart.  I'm using the AIR-ANT5114P2M-N= antenna on both sides.  These APs are installed on the roof of 2 buildings.  On the root bridge, I have a 2.4 GHz directional antenna pointed the in another direction that is bridged with a 1532 (not sure if that information is pertinent).  When I run the command, show controllers do1 radio-stats, this is my output on the root bridge:

DOT11 Statistics (Cumulative Total/Last 5 Seconds):
RECEIVER TRANSMITTER
Host Rx K Bytes: 856259 / 18 Host Tx K Bytes: 903840 / 7
Unicasts Rx: 846718 / 3 Unicasts Tx: 1397332 / 14
Unicasts to host: 846718 / 3 Unicasts by host: 1386675 / 14
Broadcasts Rx: 2867252 / 76 Broadcasts Tx: 1471470 / 48
Beacons Rx: 2836281 / 76 Beacons Tx: 1471470 / 48
Broadcasts to host: 2867252 / 76 Broadcasts by host: 0 / 0
Multicasts Rx: 0 / 0 Multicasts Tx: 0 / 0
Multicasts to host: 0 / 0 Multicasts by host: 0 / 0
Mgmt Packets Rx: 30991 / 0 Mgmt Packets Tx: 32 / 0
RTS received: 0 / 0 RTS transmitted: 24688 / 0
Duplicate frames: 0 / 0 CTS not received: 2275 / 0
CRC errors: 2361148 / 35 Unicast Fragments Tx: 1397332 / 14
WEP errors: 0 / 0 Retries: 62605 / 0
Buffer full: 0 / 0 Packets one retry: 48912 / 0
Host buffer full: 0 / 0 Packets > 1 retry: 6537 / 0
Header CRC errors: 0 / 0 Protocol defers: 0 / 0
Invalid header: 0 / 0 Energy detect defers: 0 / 0
Length invalid: 0 / 0 Jammer detected: 0 / 0
Incomplete fragments: 0 / 0 Packets aged: 0 / 0
Rx Concats: 0 / 0 Tx Concats: 0 / 0
R2H Buffer full: 0 / 0

Tx Watchdog stats:
Tx SW Watchdog 0 / 0
Tx HW Watchdog 0 / 0

RATE 24.0
Rx Packets: 2 / 0 Tx Packets: 1 / 0
Rx Bytes: 128 / 0 Tx Bytes: 129 / 0
RTS Retries: 0 / 0 Data Retries: 7 / 0

RATE 54.0
Rx Packets: 7 / 0 Tx Packets: 8 / 0
Rx Bytes: 517 / 0 Tx Bytes: 635 / 0
RTS Retries: 0 / 0 Data Retries: 2 / 0

RATE a0.1-2
Rx Packets: 0 / 0 Tx Packets: 45 / 0
Rx Bytes: 0 / 0 Tx Bytes: 11702 / 0
RTS Retries: 0 / 0 Data Retries: 240 / 0

RATE a3.1-2
Rx Packets: 0 / 0 Tx Packets: 63 / 0
Rx Bytes: 0 / 0 Tx Bytes: 29240 / 0
RTS Retries: 0 / 0 Data Retries: 252 / 0

RATE a5.1-2
Rx Packets: 0 / 0 Tx Packets: 252 / 0
Rx Bytes: 0 / 0 Tx Bytes: 101005 / 0
RTS Retries: 0 / 0 Data Retries: 756 / 0

RATE a0.2-2
Rx Packets: 74 / 0 Tx Packets: 1 / 0
Rx Bytes: 17281 / 0 Tx Bytes: 50 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a2.2-2
Rx Packets: 5 / 0 Tx Packets: 0 / 0
Rx Bytes: 316 / 0 Tx Bytes: 0 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a3.2-2
Rx Packets: 60 / 0 Tx Packets: 0 / 0
Rx Bytes: 16561 / 0 Tx Bytes: 0 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a4.2-2
Rx Packets: 5 / 0 Tx Packets: 0 / 0
Rx Bytes: 777 / 0 Tx Bytes: 0 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a5.2-2
Rx Packets: 3870 / 0 Tx Packets: 4765 / 0
Rx Bytes: 1878752 / 0 Tx Bytes: 1747426 / 0
RTS Retries: 0 / 0 Data Retries: 9526 / 0

RATE a6.2-2
Rx Packets: 6 / 0 Tx Packets: 0 / 0
Rx Bytes: 446 / 0 Tx Bytes: 0 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a7.2-2
Rx Packets: 39 / 0 Tx Packets: 51 / 0
Rx Bytes: 3979 / 0 Tx Bytes: 4013 / 0
RTS Retries: 0 / 0 Data Retries: 1 / 0

RATE a8.2-2
Rx Packets: 7197 / 0 Tx Packets: 7753 / 0
Rx Bytes: 1324993 / 0 Tx Bytes: 1467957 / 0
RTS Retries: 0 / 0 Data Retries: 115 / 0

RATE a9.2-4
Rx Packets: 835386 / 3 Tx Packets: 1373690 / 14
Rx Bytes: 178333832 / 605 Tx Bytes: 914395408 / 7351
RTS Retries: 0 / 0 Data Retries: 51599 / 0

Here it is for the non-root side:

DOT11 Statistics (Cumulative Total/Last 5 Seconds):
RECEIVER TRANSMITTER
Host Rx K Bytes: 1982515 / 73 Host Tx K Bytes: 141763 / 3
Unicasts Rx: 1023433 / 49 Unicasts Tx: 639797 / 39
Unicasts to host: 1023433 / 49 Unicasts by host: 634961 / 39
Broadcasts Rx: 5825661 / 284 Broadcasts Tx: 72 / 0
Beacons Rx: 5788324 / 282 Beacons Tx: 0 / 0
Broadcasts to host: 5825661 / 284 Broadcasts by host: 72 / 0
Multicasts Rx: 0 / 0 Multicasts Tx: 0 / 0
Multicasts to host: 0 / 0 Multicasts by host: 0 / 0
Mgmt Packets Rx: 37357 / 2 Mgmt Packets Tx: 86 / 0
RTS received: 0 / 0 RTS transmitted: 13248 / 0
Duplicate frames: 0 / 0 CTS not received: 953 / 0
CRC errors: 758869 / 16 Unicast Fragments Tx: 639869 / 39
WEP errors: 0 / 0 Retries: 30031 / 1
Buffer full: 0 / 0 Packets one retry: 23074 / 1
Host buffer full: 0 / 0 Packets > 1 retry: 3139 / 0
Header CRC errors: 0 / 0 Protocol defers: 0 / 0
Invalid header: 0 / 0 Energy detect defers: 0 / 0
Length invalid: 0 / 0 Jammer detected: 0 / 0
Incomplete fragments: 0 / 0 Packets aged: 0 / 0
Rx Concats: 0 / 0 Tx Concats: 0 / 0
R2H Buffer full: 0 / 0

Tx Watchdog stats:
Tx SW Watchdog 0 / 0
Tx HW Watchdog 0 / 0

LOST PARENT COUNTS ASSOCIATION STATISTICS
Maximum retries: 0 / 0 SSID mismatched: 0 / 0
No beacons: 0 / 0 Not specified AP: 0 / 0
Average retry level: 0 / 0 Rates mismatched: 0 / 0
Deauthenicated: 1 / 0 Privacy mismatched: 0 / 0
Disassociated: 0 / 0 Authentication rejects: 0 / 0
Time base lost: 0 / 0 Association timeout: 0 / 0
Host request: 0 / 0 LEAP successes: 3 / 0
Better parent found: 0 / 0 LEAP failures: 0 / 0
LEAP timeouts: 0 / 0
LEAP key len fails: 0 / 0
PHY element mismatch: 0 / 0
WPA IE mismatch: 0 / 0

RATE 24.0
Rx Packets: 1 / 0 Tx Packets: 2 / 0
Rx Bytes: 129 / 0 Tx Bytes: 128 / 0
RTS Retries: 0 / 0 Data Retries: 15 / 0

RATE 54.0
Rx Packets: 145301 / 48 Tx Packets: 6 / 0
Rx Bytes: 34144289 / 11280 Tx Bytes: 487 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a0.1-2
Rx Packets: 0 / 0 Tx Packets: 63 / 0
Rx Bytes: 0 / 0 Tx Bytes: 14432 / 0
RTS Retries: 0 / 0 Data Retries: 341 / 0

RATE a3.1-2
Rx Packets: 0 / 0 Tx Packets: 46 / 0
Rx Bytes: 0 / 0 Tx Bytes: 11227 / 0
RTS Retries: 0 / 0 Data Retries: 184 / 0

RATE a5.1-2
Rx Packets: 0 / 0 Tx Packets: 150 / 0
Rx Bytes: 0 / 0 Tx Bytes: 42866 / 0
RTS Retries: 0 / 0 Data Retries: 450 / 0

RATE a6.1-2
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 388 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a7.1-2
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 356 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a8.1-2
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 945 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a9.1-4
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 1019 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a0.2-2
Rx Packets: 40 / 0 Tx Packets: 0 / 0
Rx Bytes: 9712 / 0 Tx Bytes: 0 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a2.2-2
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 316 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a3.2-2
Rx Packets: 48 / 0 Tx Packets: 5 / 0
Rx Bytes: 17549 / 0 Tx Bytes: 333 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a4.2-2
Rx Packets: 0 / 0 Tx Packets: 5 / 0
Rx Bytes: 0 / 0 Tx Bytes: 777 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a5.2-2
Rx Packets: 8559 / 0 Tx Packets: 2403 / 0
Rx Bytes: 8326604 / 0 Tx Bytes: 901888 / 0
RTS Retries: 0 / 0 Data Retries: 4806 / 0

RATE a6.2-2
Rx Packets: 0 / 0 Tx Packets: 1 / 0
Rx Bytes: 0 / 0 Tx Bytes: 58 / 0
RTS Retries: 0 / 0 Data Retries: 0 / 0

RATE a7.2-2
Rx Packets: 44 / 0 Tx Packets: 33 / 0
Rx Bytes: 3537 / 0 Tx Bytes: 3559 / 0
RTS Retries: 0 / 0 Data Retries: 1 / 0

RATE a8.2-2
Rx Packets: 6511 / 0 Tx Packets: 6621 / 0
Rx Bytes: 1164024 / 0 Tx Bytes: 1241634 / 0
RTS Retries: 0 / 0 Data Retries: 92 / 0

RATE a9.2-4
Rx Packets: 1008185 / 49 Tx Packets: 625554 / 39
Rx Bytes: 653672283 / 5094 Tx Bytes: 141137609 / 3801
RTS Retries: 0 / 0 Data Retries: 23875 / 1

Couple of questions...

1. Why all of the Data Retries?  What exactly are Data Retries?

2. Why can I not make use of the 80 MHz channel width.  The highest I get is a9.2-4 which from my research is 2 spatial streams at 40 MHz.  In the configuration of the radio, I have specified channel width 80.  Carrier busy test show very little interference on the 5 GHz band.

Here is root bridge configuration for Do1:

interface Dot11Radio1
no ip address
no ip route-cache
!
encryption vlan 253 mode ciphers aes-ccm
!
ssid BRIDGE_MGMT
!
antenna gain 10
peakdetect
no dfs band block
stbc
speed basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15. m16. m17. m18. m19. m20. m21. m22. m23. a1ss9 a2ss9 a3ss9
channel width 80
channel dfs
station-role root bridge

Here is non-root bridge configuration for Do1:

interface Dot11Radio1
no ip address
no ip route-cache
!
encryption vlan 253 mode ciphers aes-ccm
!
ssid BRIDGE_MGMT
!
antenna gain 10
peakdetect
stbc
speed basic-6.0 basic-9.0 basic-12.0 basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15. m16. m17. m18. m19. m20. m21. m22. m23. a1ss9 a2ss9 a3ss9
station-role non-root bridge

Thanks,

Andrew