Re: OT: Wireless Signal Strength

I just checked waseem, The APs on floors tht are running fine (i.e. having 3
or more APs) are using same channel. Channel 1.... very few of the APs are
using channel 6. but majority on channel 1.

Saalam

On Mon, Dec 27, 2010 at 4:48 PM, Mohammad Saeed <mzsaeed_at_gmail.com> wrote:

> Its actually desired to use different channels for AP's which are
> close to each other that will avoid two AP's using same channel and
> having interference because of it. So, if two AP's are close to each
> other and you reset them one by one, you shall see that if one will
> start using Channel 1, orger will select channel 6 automatically to
> avoide interference.
>
> Wassalam
>
>
>
> On Mon, Dec 27, 2010 at 12:14 AM, Khurram Noor
> <engr.khurramnoor_at_googlemail.com> wrote:
> > Yes, this is an important point. As i calculated, 18 out of 24 Aps are
> using
> > channel 1 and the rest of 6 are using channel 6. The first floor and
> eight
> > floor are the one which has most problems, both have only 2 APs convering
> > the whole floors and both APs are in different channels, i.e. 1 and 6
> > respectively. Again this is dynamic assignment by RRM.
> >
> > Regards,
> > Khurram
> >
> > On Sun, Dec 26, 2010 at 8:46 PM, Mohammad Saeed <mzsaeed_at_gmail.com>
> wrote:
> >>
> >> Also try resetting the AP's one by one, what it will possibally do
> >> that once w=one AP is UP and its using channel 1, the 2nd AP will
> >> startup, detetct that other AP is using channel 1 and will start using
> >> channel 6 or other non-overlapping channel.
> >>
> >> Wassalam,
> >>
> >> Mohammad Zahid Saeed
> >>
> >> On Sun, Dec 26, 2010 at 10:17 AM, Khurram Noor
> >> <engr.khurramnoor_at_googlemail.com> wrote:
> >> > Salam Saeed,
> >> >
> >> > I checked your idea. I used one D-link wireless router for Wi-Fi
> >> > connectivity on the same machine where signal strength problem was
> >> > encountered, but it is working fine. even on greater distance.
> >> >
> >> > The thing with WLC managed AP which is very surprising is that the
> users
> >> > even sitting very close to the APs are encountring this problem. There
> >> > are
> >> > two WLCs, each has 12 APs connected. This problem is particular in
> areas
> >> > of
> >> > floor were are only two APs on the whole floor. By the way those APs
> are
> >> > not
> >> > properly placed so i will try changing the position to see if
> >> > convergance
> >> > for wireless network improves.
> >> >
> >> > Regards,
> >> > Khurram
> >> > On Sun, Dec 26, 2010 at 4:48 PM, Mohammad Saeed <mzsaeed_at_gmail.com>
> >> > wrote:
> >> >>
> >> >> Assalamualaikum,
> >> >>
> >> >> If this is problem with all AP's, then its highly unlikely that all
> >> >> AP's have started having HW problem at once. I would suspect most
> >> >> likely there is some interference problem, check if something has
> been
> >> >> changed/added in the building?
> >> >> I would recommend installing a standalone AP (not registering with
> >> >> WLC) and connect to that AP to eliminate WLC's are not causing the
> >> >> issue. If cleint clnnecting to that AP does not suffer similar signal
> >> >> strength issue, then check whats been changed in WLC?
> >> >>
> >> >> Wassalam,
> >> >>
> >> >> Mohammad Zahid Saeed
> >> >>
> >> >> On Sun, Dec 26, 2010 at 1:18 AM, Khurram Noor
> >> >> <engr.khurramnoor_at_googlemail.com> wrote:
> >> >> > Dear all,
> >> >> >
> >> >> >
> >> >> >
> >> >> > I am having a strange problem with a client. He has around 25
> access
> >> >> > points
> >> >> > installed in a 8 floor building. They are using cisco AP 1140 with
> 2
> >> >> > WLCs
> >> >> > 5508 for management. Things were fine in the beginning but now the
> >> >> > problem
> >> >> > is with the signal strength. The signal bars on any system before
> >> >> > connection
> >> >> > shows excellent strength, but as soon as the system gets connected,
> >> >> > the
> >> >> > signal strength starts to decrease and becomes poor. this causes
> >> >> > latency
> >> >> > and
> >> >> > timeout. Browsing becomes really slow and wireless users are
> >> >> > suffering.
> >> >> >
> >> >> >
> >> >> >
> >> >> > Wireless Lan controller runs an algorithm called RRM, which
> >> >> > automatically
> >> >> > adjust Tx power, channel assignment and many other parameter. If
> >> >> > there
> >> >> > is
> >> >> > someone in this group who know can tell what settings on WLC need
> to
> >> >> > change.
> >> >> > Could this be a result of some power issue on the catalyst 4500
> >> >> > switch
> >> >> > which
> >> >> > is a POE supported? Or is this some malware kind of thing?
> >> >> >
> >> >> >
> >> >> > By the way wired users have no such problem (latency, delay etc)
> >> >> >
> >> >> > --
> >> >> > Khurram Noor
> >> >> >
> >> >> >
> >> >> > Blogs and organic groups at http://www.ccie.net
> >> >> >
> >> >> >
> >> >> >
> _______________________________________________________________________
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> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >
> >> >
> >
> >
> >
> > --
> > Khurram Noor
> > CCIE # 24419
> >
> > http://www.linkedin.com/in/khurramnoor
> >
>

-- 
Khurram Noor
CCIE # 24419
http://www.linkedin.com/in/khurramnoor
Blogs and organic groups at http://www.ccie.net