Hi Philippe,
Another reason for 2 drops is resiliency. I envision connecting the
AP's 2 ports to a 2-switch stack. We rarely see the need for redundant
power supplies in an edge switch, but have seen failure on a switch ASIC
cause one or more ports to go dead. With 2 connections, one switch
having issues won't take out the AP. I think LAG'g both ports across
the stack & supporting LACP will become a future requirement.
-John
--
John Center
Villanova University
On 02/07/2014 10:21 AM, Hanset, Philippe C wrote:
Is the main justification for two drops due to power/bandwidth/the-two?
With many services and most killer apps going to the cloud, I would
suspect that the bandwidth to the WAN is so limiting,
that this excess of capacity on Wireless is a complete overkill (a
vendor driven non-sense).
Yes, those 802.11ac Phase2 APs can generate a lot more than 1 Gbps, but
that's is shared bandwidth (half-duplex),
and your uplink is 1 Gbps full-duplex (2 Gbps in Cisco math as we said
in the old days).
So, you really plan to also uplink your switches with 40 Gbps, and then
a core at many times 100 Gbps, all connected
to your ISP at a few Gbps... something doesn't add up here.
Am I alone making bad accounting here?
Philippe Hanset
www.eduroam.us <http://www.eduroam.us>
On Feb 7, 2014, at 9:58 AM, James Robert Kennon <[email protected]
<mailto:[email protected]>>
wrote:
We just made a call on a new building and decided not to incur cost of
2 cables per drop at this time. Hope we don't regret it later.
From: Lee H Badman <[email protected] <mailto:[email protected]>>
Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv
<[email protected]
<mailto:[email protected]>>
Date: Fri, 7 Feb 2014 14:56:31 +0000
To: <[email protected]
<mailto:[email protected]>>
Subject: Re: [WIRELESS-LAN] How many drops 802.11ac phase 2
We'll be running two, until some sanity emerges.
------------------------------------------------------------------------
*From:* The EDUCAUSE Wireless Issues Constituent Group Listserv
<[email protected]
<mailto:[email protected]>> on behalf of Brian David
<[email protected] <mailto:[email protected]>>
*Sent:* Friday, February 7, 2014 9:54 AM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* [WIRELESS-LAN] How many drops 802.11ac phase 2
All,
I wanted to see how many people were planning on running 2 drops to
802.11ac phase 2 access points?
Currently we are just doing a one for one swap when replacing an older
a/b/g AP’s with 802.11ac phase 1 AP’s
When you have new construction, do you plan on running 2 drops so when
phase 2 come into play you will be all set for it?
*/Brian J David/*
*/Network Systems/*
*/Boston College/*
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