Wi-Fi Standard: IEEE 802.11a/b/g/n/ac/ax (Wi-Fi 6 R2 and Wi-Fi 6E certified; no Wi-Fi 7)
Spatial Streams (MIMO): 4x4 on each radio (2.4 GHz, 5 GHz, 6 GHz); 4x4 UL/DL MU-MIMO
Aggregate Throughput: Up to 7.78 Gbps PHY per radio (6 GHz 4x4 160 MHz peak); Cisco publishes no combined tri-radio total
Radios (bands): Three 4x4 radios: 2.4 GHz, 5 GHz, 6 GHz (LPI); dual-band XOR radio (6 GHz or secondary 5 GHz); integrated BLE 5.1 and IoT radios; dedicated scanning radio for security and RF management
Uplink Port Speed: 1x multigigabit RJ-45 at 100M/1G/2.5G/5G; management console RJ-45; USB 2.0 (4.5 W)
Max Clients: Not stated by Cisco; some reseller listings cite about 1200 for the CW9166D1 (unverified)
PoE Requirement: 802.3bt (UPOE) 30.5 W max for full functionality with USB; 802.3at (PoE+) 25.5 W max without USB; 802.3af (14 W) for staging only with radios off; optional 54 V DC input (MA-PWR-50WAC)
Dimensions and Weight: CW9166I: 9.5 x 9.5 x 2.2 in, 3.54 lb; CW9166D1: 9.5 x 9.5 x 2.28 in, 3.50 lb
Models: CW9166I-x and CW9166D1-x (on-premises, IOS-XE); CW9166I-MR and CW9166D1-MR (Meraki cloud-managed)
Minimum Software: IOS-XE 17.9.1 (CW9166I) and 17.12.1 (CW9166D1), per third-party sources
Curation Review
✔ Pros:Tri-band Wi-Fi 6E with 4x4 on 2.4, 5 and 6 GHz; 6 GHz access adds clean spectrum for high-density deployments; Dedicated scanning radio supports continuous RF monitoring, security and WIPS; Choice of internal omnidirectional (CW9166I) or directional (CW9166D1) antennas; Supports Cloud management via Meraki (-MR SKUs) or on-premises IOS-XE; WPA3-R3, WPA3 Suite B and Enhanced Open security; Single 2.5G multigigabit uplink works with standard 802.3at/bt PoE
✘ Cons:Wi-Fi 6E only, with no Wi-Fi 7 (802.11be) support; Full feature set needs 802.3bt (UPOE), so 802.3at switches cannot power every feature; Only one uplink port, with no link aggregation or redundancy; Cisco publishes no max client count, so capacity planning relies on estimates; Regional suffixes and regulatory approvals vary, so some SKUs may not be approved for every country; Premium price, with list MSRP about $2,500 and reseller prices often well below it
Est. Price:
$1,299 - $2,694
Compare Against
Cisco Catalyst 9178i
★ 4.3 Value Score
Technical Specifications
Wi-Fi Standard: Wi-Fi 7 (802.11be)
Spatial Streams (MIMO): 4x4 MU-MIMO per client-serving radio (4 spatial streams per radio)
Radios (bands): 4 client-serving radios: tri-band 2.4 GHz / 5 GHz / 6 GHz with a 4th radio (quad-radio design)
Uplink Port Speed: 2x 10 Gbps mGig ports (multi-gigabit Ethernet)
Max Clients: 1200 (400 per radio)
PoE Requirement: 802.3bt (PoE++) required for full operation; 802.3at/af supports reduced functionality; draws approx. 30-52 W
Curation Review
✔ Pros:Wi-Fi 7 with tri-band 2.4/5/6 GHz and 4x4 MU-MIMO on every radio; 24 Gbps aggregate throughput for high-density environments; dual 10 Gbps mGig uplinks avoid a 1 Gbps bottleneck; rated for up to 1200 clients; supports 802.3bt PoE on the mGig ports with at/af fallback; manageable from Catalyst 9800 WLC/Catalyst Center or Meraki cloud depending on SKU
✘ Cons:Requires 802.3bt PoE for full functionality, which raises switch and injector cost; needs Catalyst 9800 controller running IOS XE 17.15.2 or later for the Catalyst SKU; Wi-Fi 7 benefits need Wi-Fi 7 clients to be realized; list pricing varies widely by reseller and SKU (CFG vs Global vs RTG), and reseller spec figures differ in places; cloud-managed (Meraki) deployment requires separate licensing; premium cost compared with Wi-Fi 6E alternatives
