802.11ac Module - Clients report lower speed

[tresdodi]

I just set up a 3602I AP with an RM3000AC 802.11ac module and a WLC 2504. Now my ac capable clients are reporting 400 mbps connected to the 5 GHz ac. The thing is these same devices reported more than 800 mbps before when connected to an ac consumer router Netgear R7000.

I am using the same channels and automatic radio power now. Am I missing something here?

[Leo Laohoo]

Post the complete output to the command "sh client detail <802.11ac wireless client MAC address>".

[tresdodi]

Here's the output:

(R01k_WLC) >show client detail F8:16:54:DB:8F:62
Client MAC Address............................... f8:16:54:db:8f:62
Client Username ................................. N/A
AP MAC Address................................... 58:97:1e:b2:8c:e0
AP Name.......................................... R01k_AP
AP radio slot Id................................. 2
Client State..................................... Associated
Client NAC OOB State............................. Access
Wireless LAN Id.................................. 2
Hotspot (802.11u)................................ Not Supported
BSSID............................................ 58:97:1e:b2:8c:e6
Connected For ................................... 816 secs
Channel.......................................... 153
IP Address....................................... 192.168.1.110
Gateway Address.................................. Unknown
Netmask.......................................... Unknown
IPv6 Address..................................... fe80::40b7:c647:3442:ade0
Association Id................................... 1
Authentication Algorithm......................... Open System
Reason Code...................................... 1
Status Code...................................... 0
Session Timeout.................................. 1800
Client CCX version............................... 4
Client E2E version............................... 1
QoS Level........................................ Silver
Avg data Rate.................................... 0
Burst data Rate.................................. 0
Avg Real time data Rate.......................... 0
Burst Real Time data Rate........................ 0
802.1P Priority Tag.............................. disabled
CTS Security Group Tag........................... Not Applicable
KTS CAC Capability............................... No
WMM Support...................................... Enabled
  APSD ACs.......................................  BK  BE  VI  VO
Power Save....................................... OFF
Current Rate..................................... m9/400.0
Supported Rates.................................. 6.0,9.0,12.0,18.0,24.0,36.0,
    ............................................. 48.0,54.0
Mobility State................................... Local
Mobility Move Count.............................. 0
Security Policy Completed........................ Yes
Policy Manager State............................. RUN
Policy Manager Rule Created...................... Yes
Audit Session ID................................. c0a801030000000f567f7d64
AAA Role Type.................................... none
Local Policy Applied............................. none
IPv4 ACL Name.................................... none
FlexConnect ACL Applied Status................... Unavailable
IPv4 ACL Applied Status.......................... Unavailable
IPv6 ACL Name.................................... none
IPv6 ACL Applied Status.......................... Unavailable
Layer2 ACL Name.................................. none
Layer2 ACL Applied Status........................ Unavailable
mDNS Status...................................... Enabled
mDNS Profile Name................................ default-mdns-profile
No. of mDNS Services Advertised.................. 0
Policy Type...................................... WPA2
Authentication Key Management.................... PSK
Encryption Cipher................................ CCMP (AES)
Protected Management Frame ...................... No
Management Frame Protection...................... No
EAP Type......................................... Unknown
Interface........................................ management
VLAN............................................. 0
Quarantine VLAN.................................. 0
Access VLAN...................................... 0
Client Capabilities:
      CF Pollable................................ Not implemented
      CF Poll Request............................ Not implemented
      Short Preamble............................. Not implemented
      PBCC....................................... Not implemented
      Channel Agility............................ Not implemented
      Listen Interval............................ 250
      Fast BSS Transition........................ Not implemented
Client Wifi Direct Capabilities:
      WFD capable................................ No
      Manged WFD capable......................... No
      Cross Connection Capable................... No
      Support Concurrent Operation............... No
Fast BSS Transition Details:
Client Statistics:
      Number of Bytes Received................... 866230
      Number of Bytes Sent....................... 1235826
      Total Number of Bytes Sent................. 1235826
      Total Number of Bytes Recv................. 866230
      Number of Bytes Sent (last 90s)............ 447079
      Number of Bytes Recv (last 90s)............ 344915
      Number of Packets Received................. 3759
      Number of Packets Sent..................... 3081
      Number of Interim-Update Sent.............. 0
      Number of EAP Id Request Msg Timeouts...... 0
      Number of EAP Id Request Msg Failures...... 0
      Number of EAP Request Msg Timeouts......... 0
      Number of EAP Request Msg Failures......... 0
      Number of EAP Key Msg Timeouts............. 0
      Number of EAP Key Msg Failures............. 0
      Number of Data Retries..................... 10970877236
      Number of RTS Retries...................... 0
      Number of Duplicate Received Packets....... 0
      Number of Decrypt Failed Packets........... 0
      Number of Mic Failured Packets............. 0
      Number of Mic Missing Packets.............. 0
      Number of RA Packets Dropped............... 0
      Number of Policy Errors.................... 0
      Radio Signal Strength Indicator............ -58 dBm
      Signal to Noise Ratio...................... 35 dB
Client Rate Limiting Statistics:
      Number of Data Packets Recieved............ 0
      Number of Data Rx Packets Dropped.......... 0
      Number of Data Bytes Recieved.............. 0
      Number of Data Rx Bytes Dropped............ 0
      Number of Realtime Packets Recieved........ 0
      Number of Realtime Rx Packets Dropped...... 0
      Number of Realtime Bytes Recieved.......... 0
      Number of Realtime Rx Bytes Dropped........ 0
      Number of Data Packets Sent................ 0
      Number of Data Tx Packets Dropped.......... 0
      Number of Data Bytes Sent.................. 0
      Number of Data Tx Bytes Dropped............ 0
      Number of Realtime Packets Sent............ 0
      Number of Realtime Tx Packets Dropped...... 0
      Number of Realtime Bytes Sent.............. 0
      Number of Realtime Tx Bytes Dropped........ 0
Nearby AP Statistics:
      R01k_AP(slot 0)
        antenna0: 215 secs ago................... -37 dBm
        antenna1: 215 secs ago................... -31 dBm
      R01k_AP(slot 1)
        antenna0: 212 secs ago................... -60 dBm
        antenna1: 212 secs ago................... -50 dBm
      R01k_AP(slot 2)
        antenna0: 212 secs ago................... -59 dBm
        antenna1: 212 secs ago................... -54 dBm
DNS Server details:
      DNS server IP ............................. 0.0.0.0
      DNS server IP ............................. 0.0.0.0
Assisted Roaming Prediction List details:

 Client Dhcp Required:     False
Allowed (URL)IP Addresses


(R01k_WLC) >

[Leo Laohoo · Accepted solution]

Current Rate..................................... m9/400.0

This is what I'm looking for.  

MCS rate of m9 means the wireless client can only support 2 spatial-stream (and 40 Mhz channel-width instead of 802.11ac standard 80 Mhz), hence 400 Mbps ONE-WAY-TRAFFIC.  Netgear "fudges" the value by showing 800 Mbps which means the sum of the upload & download traffic.  

[tresdodi]

That was very helpful. Based on your explanation and chart, I remembered that my set channel width for the ac radio currently was 40 MHz. I bumped it  to 80 MHz and got the expected 867 Mbps back on both clients. Looks like the Netgear R7000 does that automatically because it's nowhere in it's GUI.