MCS Index Varies Widely When Connected to AC vs N

Discussion in 'Mac OS X Server, Xserve, and Networking' started by jyyz, Jan 29, 2016.

  1. jyyz macrumors newbie

    Joined:
    Oct 17, 2014
    #1
    Hi all. My broadband connect was recently upgraded to 250Mbps, and my old reliable AEBS (2nd gen) couldn't transmit at that level.

    Replaced the AEBS with a new 6th gen model.

    So AEBS (6th) + rMBP (late 2013) within feet of each other. This is what I am getting when connected to ac vs n:

    PHY Mode: 802.11ac
    Channel: 132
    Country Code: CA
    Network Type: Infrastructure
    Security: WPA2 Personal
    Signal / Noise: -42 dBm / -93 dBm
    Transmit Rate: 1300
    MCS Index: 9

    PHY Mode: 802.11n
    Channel: 11
    Country Code: CA
    Network Type: Infrastructure
    Security: WPA2 Personal
    Signal / Noise: -28 dBm / -98 dBm
    Transmit Rate: 217
    MCS Index: 23

    Does that make sense - that the n network would be using more streams than the ac? Want to be sure there are no issues with the AEBS - on n it is underperforming compared to the way old AEBS it replaced. On AC the TX rate varies widely from 800 to 1300 sitting right next to the router.

    Thanks!
     
  2. satcomer macrumors 603

    satcomer

    Joined:
    Feb 19, 2008
    Location:
    The Finger Lakes Region
    #2
    It's because you were using wireless N on wireless G channels on the old router!
     

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