[c-nsp] Access Point & 2 SSID's Trunked to Vlan's

[Dan Letkeman]

Well I just did a test two AP's about 100 feet apart and the notebook roamed
from one AP to the other without losing a ping.  We are interested in
putting in a voip system and possibly having a few wireless phones.  Will
this configuration of an access point cause calls to be dropped?

Dan.

On Dec 18, 2007 2:47 PM, Fred Reimer <freimer at ctiusa.com> wrote:

> This is incorrect.  You don't get "fast" roaming, such as may be required
> for some protocols like VoIP, but you will not get "disconnected" by the
> common use of the term.  You are of course disassociated from one AP and
> you
> need to reassociate to another AP.  However, it would depend on what kind
> of
> authentication you are doing as to whether this would "disconnect" the
> client.
>
> The client makes the decision on when to roam, but an AP can of course
> forcefully disassociate a client.  You can configure the power settings
> for
> each radio in an AP.
>
> Fred Reimer, CISSP, CCNP, CQS-VPN, CQS-ISS
> Senior Network Engineer
> Coleman Technologies, Inc.
> 954-298-1697
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> A.L.M.Buxey at lboro.ac.uk
> Sent: Tuesday, December 18, 2007 9:17 AM
> To: Dan Letkeman
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Access Point & 2 SSID's Trunked to Vlan's
>
> Hi,
>
> > If I copy this configuration to my other ap's in the building will a
> > client(notebook) automatically roam from ap to ap without getting
> > disconnected?
>
> not without using other technologies - as each AP runs the authentication
> so your client needs to reauthenticate when associating with each AP
>
> > Do you have 802.11a clients or is the 802.11a radio used for something
> else?
> > How would I setup the AP so there is a minimum signal level that is
> > allowed?  eg, if a user is outside the building and still connected that
> it
> > won't work if the users device is say past -75db...
>
> you can start off by using the 'speed' command to select the supported
> connection rates - but a decent antennae may negate the 'security' of
> such a setup. personally i feel that WPA2 is strong enough that it doesnt
> matter if the signal can be received from further away. you could also
> turn down the power of the antennae (antenna gain) - but, once again, that
> will affect how your own users will receive the wireless.  place
> a decent zinc/neodynium mesh or somesuch in your wall cavities - there
> are some papers out there describing such blocking methods.
>
> > Also, I accidentally ordered LWAPP's and I have converted them back to
> > autonomous ap's.  Is there any difference between a converted one vs a
> > bought autonomous ap?
>
> apart from how it appears in CDP, inventory lists and its bootloader?
> no functional difference as far as i'm aware.
>
> alan
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