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Community Member

3702i and Port Speeds

Hello all,

 

Other than not being able to get 802.11ac speeds are there any issues in plugging an autonomous 3702i into a FastEthernet port and not a GigEthernet port?  A new switch is coming soon but the AP will be there first.

 

 

 

Thanks in advance!  All replies rated.

5 REPLIES
Hall of Fame Super Blue

You want to enable 802.11ac

You want to enable 802.11ac wave 1 and connect is to a FastEthernet port?

 

I mean, 802.11ac wave 1 is 1.3 Gbps.  Sticking it into a FastEthernet port assures you won't get beyond 100 Mbps.  If you really, really want 802.11ac wave 1 speed, the AP needs to be connected to a 3650 or 3850 or a 4500R+E with Sup8E installed.  Otherwise, the "highest" speedtest.net you'll probably get is 1 Gbps (if your AP is connected to a 1 Gbps port with 1- or 10 Gbps uplink).

Community Member

Thanks to you both.  The

Thanks to you both.  The speed restriction is what I expected.  The entire location is due for an AP and switch upgrade.  All APs will be the 3702i but it is a few months down the road.  The AP for part of the building is needed now and I didn't want to get something other than the model that was coming.

Hall of Fame Super Blue

Forgot one important thing:

Forgot one important thing:  The current native 802.11ac AP will require 20.0w PoE.  

 

So when choosing your switch, make sure you do not over-draw the power the the PoE.  You can, however, operate the APs with 15.4w PoE but this means you'll get only 802.11n speed at best.  

Community Member

Yep scott it should work fine

Yep scott it should work fine, below is the snippet from data sheet for reference.

 

Power draw

* This is the power required at the PSE, which is a switch or injector.

Description

AP Functionality

PoE Budget*

(Watts)

802.3af

E-PoE

802.3at PoE+

PWRINJ4

PoE+

802.3at

3700 - No external module installed

4x4:3 on 2.4/5 GHz

16.1

x

ü

ü

3700 + Wireless Security Module

4x4:3 on 2.4/5 GHz + WSM

19.6

x

ü

ü

PoE

802.3af

3700 - No external module installed

3x3:3 on 2.4/5 GHz

15.4

ü

n/a

n/a

3700 + Wireless Security Module

2x2:2 on 2.4/5 GHz + WSM

15.4

ü

n/a

n/a

 

http://www.cisco.com/c/en/us/products/collateral/wireless/3700-series-access-point/data_sheet_c78-729421.html

Cisco Employee

Will I need to buy new

Will I need to buy new switches to support 802.11ac?

802.11ac APs will perform very well when plugged into gigabit ports that support POE+
(802.11at). While the standard supports data rates up to almost 7 gigabits per second (gbps),
those rates will not be supported in early products. Early 802.11ac APs are likely to only
support up to 3 streams and 80 MHz channels. That puts theoretical radio throughput around
1.3 gbps. Actually throughput will be lower and
adequately served by agigabit port. 802.11ac APs are likely to require POE+ (AT) power due to increased
power draws of the faster CPUs and radios.Additionally,even if the AP infrastructure is upgraded, it will take
time for the client population to migrate to 802.11ac and for the traffic density to increase. While the APs have to be upgraded
to support the first 11ac connection, the controllers and switch upgrades can
coincide with the client distribution switch to 802.11ac

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