Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

Hi All,

I have an issue with the Cisco 1231G wireless access points.

I have to provide access for clients with 802.11b cards and also
clients with 802.11g cards.

The documentation at the following URL's indicate that this is
possible using the access point that I have mentioned.

http://www.cisco.com/en/US/products/...0800937a6.html

http://www.cisco.com/en/US/products/...430/index.html

I also find the same information on the linksys site regarding their
WAP54G wireless G access point.

http://www.linksys.com/products/prod...id=35&prid=608

I have trolled through the cisco website but I cannot find any
information on how this can be achieved.

I rang our suppliers and the engineer I spoke to informed me that this
is not the case, you CANNOT enable 802.11b client card connections to
a Cisco 1231G you have to buy the Cisco 1231b.

I understood that the 802.11g standard allowed for backwards
compatibility with 802.11b clients ?

If anyone can help me out here I would be grateful ?

Cheers ...
Drop the ZZZ to reply

Cheers ...

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

Chris Davies <z400d3ZZZ@yahoo.co.uk> wrote in message news:<gh6rc0lhr9u1adpncb6abhtkulgoq4raoh@4ax.com>. ..
> Hi All,
>
> I have an issue with the Cisco 1231G wireless access points.
>
> I have to provide access for clients with 802.11b cards and also
> clients with 802.11g cards.
>
> The documentation at the following URL's indicate that this is
> possible using the access point that I have mentioned.
>
> http://www.cisco.com/en/US/products/...0800937a6.html
>
> http://www.cisco.com/en/US/products/...430/index.html
>
> I also find the same information on the linksys site regarding their
> WAP54G wireless G access point.
>
> http://www.linksys.com/products/prod...id=35&prid=608
>
> I have trolled through the cisco website but I cannot find any
> information on how this can be achieved.
>
> I rang our suppliers and the engineer I spoke to informed me that this
> is not the case, you CANNOT enable 802.11b client card connections to
> a Cisco 1231G you have to buy the Cisco 1231b.
>
> I understood that the 802.11g standard allowed for backwards
> compatibility with 802.11b clients ?
>
> If anyone can help me out here I would be grateful ?
>
> Cheers ...
> Drop the ZZZ to reply
>
> Cheers ...

I use Cisco 1100 WAPs, 802.11g variety. I have 802.11g and 802.11b
clients connecting to the same WAP at the same time with no problems
at all.

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

I have not been able to get caught up on the 802.11g specs not sure if the
same behaivor of the 802.11b & a.

I thought that with access points that are able to run both the 802.11b & a
modes, that if any lower speed device makes a valid attempted connection
that the entire access point reverts to the lower speed, all higher speed
cards then connect at a lower speed.

If operates the same, then even with a 802.11g capable card that also can do
802.11b and the access point doing the same then they would most likely
pick the 802.11g mode. However if a 802.11b only device comes along then
all will reduce their rates down to the 802.11b mode, hence everyone
operating at the same time.

Is this the case ?

MC

"Richard Field" <rfield@hepn.com> wrote in message
news:4c1ce46.0406140946.540325@posting.google.com. ..
> Chris Davies <z400d3ZZZ@yahoo.co.uk> wrote in message
news:<gh6rc0lhr9u1adpncb6abhtkulgoq4raoh@4ax.com>. ..
> > Hi All,
> >
> > I have an issue with the Cisco 1231G wireless access points.
> >
> > I have to provide access for clients with 802.11b cards and also
> > clients with 802.11g cards.
> >
> > The documentation at the following URL's indicate that this is
> > possible using the access point that I have mentioned.
> >
> >
http://www.cisco.com/en/US/products/..._data_sheet091
86a00800937a6.html
> >
> > http://www.cisco.com/en/US/products/...430/index.html
> >
> > I also find the same information on the linksys site regarding their
> > WAP54G wireless G access point.
> >
> > http://www.linksys.com/products/prod...id=35&prid=608
> >
> > I have trolled through the cisco website but I cannot find any
> > information on how this can be achieved.
> >
> > I rang our suppliers and the engineer I spoke to informed me that this
> > is not the case, you CANNOT enable 802.11b client card connections to
> > a Cisco 1231G you have to buy the Cisco 1231b.
> >
> > I understood that the 802.11g standard allowed for backwards
> > compatibility with 802.11b clients ?
> >
> > If anyone can help me out here I would be grateful ?
> >
> > Cheers ...
> > Drop the ZZZ to reply
> >
> > Cheers ...
>
> I use Cisco 1100 WAPs, 802.11g variety. I have 802.11g and 802.11b
> clients connecting to the same WAP at the same time with no problems
> at all.

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

>
>I use Cisco 1100 WAPs, 802.11g variety. I have 802.11g and 802.11b
>clients connecting to the same WAP at the same time with no problems
>at all.

Hi Richard,

Any chance you could post an example of the config you use please ?

Drop the ZZZ to reply

Cheers ...

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

> I thought that with access points that are able to run both the 802.11b & a
> modes, that if any lower speed device makes a valid attempted connection
> that the entire access point reverts to the lower speed, all higher speed
> cards then connect at a lower speed.
>
> If operates the same, then even with a 802.11g capable card that also can do
> 802.11b and the access point doing the same then they would most likely
> pick the 802.11g mode. However if a 802.11b only device comes along then
> all will reduce their rates down to the 802.11b mode, hence everyone
> operating at the same time.
>
> Is this the case ?

> "Richard Field" <rfield@hepn.com> wrote in message
> news:4c1ce46.0406140946.540325@posting.google.com. ..
> > Chris Davies <z400d3ZZZ@yahoo.co.uk> wrote in message
> news:<gh6rc0lhr9u1adpncb6abhtkulgoq4raoh@4ax.com>. ..
> > > Hi All,
> > >
> > > I have an issue with the Cisco 1231G wireless access points.
> > >
> > > I have to provide access for clients with 802.11b cards and also
> > > clients with 802.11g cards.
> > >
> > > The documentation at the following URL's indicate that this is
> > > possible using the access point that I have mentioned.
> > >
> > >
> http://www.cisco.com/en/US/products/..._data_sheet091
> 86a00800937a6.html
> > >
> > > http://www.cisco.com/en/US/products/...430/index.html
> > >
> > > I also find the same information on the linksys site regarding their
> > > WAP54G wireless G access point.
> > >
> > > http://www.linksys.com/products/prod...id=35&prid=608
> > >
> > > I have trolled through the cisco website but I cannot find any
> > > information on how this can be achieved.
> > >
> > > I rang our suppliers and the engineer I spoke to informed me that this
> > > is not the case, you CANNOT enable 802.11b client card connections to
> > > a Cisco 1231G you have to buy the Cisco 1231b.
> > >
> > > I understood that the 802.11g standard allowed for backwards
> > > compatibility with 802.11b clients ?
> > >
> > > If anyone can help me out here I would be grateful ?
> > >
> > > Cheers ...
> > > Drop the ZZZ to reply
> > >
> > > Cheers ...
> >
> > I use Cisco 1100 WAPs, 802.11g variety. I have 802.11g and 802.11b
> > clients connecting to the same WAP at the same time with no problems
> > at all.


Hi,

Cisco, and no less others, seem to have a policy of not making
such clashes clear. The documentation is full of statements that
a device does this and a device does that however some obvious
things like, 'it doesn't do this and that' at the same time are
missing.

The words "no" and "not", seem missing from the authors' vocabulary.
It must be fun at home:)

Anyway the documents do seem pretty clear(ish):-

http://www.cisco.com/en/US/products/hw/wireless/ps430/
products_data_sheet09186a00800937a6.html

There are two radio modules available:-

1. IEEE 802.11a
2. IEEE 802.11b *or* IEEE 802.11g

HOWEVER the 1200 series can apparently take two radios and if
you want 802.11a support as well as b/g you need to install both.

Maybe it can take two b/g radios and you can have a 'b' and a 'g'?

The problem is that I suspect that 'g' is required to support 'b'
as well and so Cisco can say that you can have 'b' and 'g' at the
same time when you are really running on 'b'. It is true but
maybe not exactly all that we might want to know.

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

On 15 Jun 2004 01:53:46 -0700, anybody43@hotmail.com (AnyBody43)
wrote:

I suspect that your last paragraph covers it really.

It seems that you can have B and G clients connected as long as you
limit the speed so that you only have the B range enabled.

This does of course mean that any G clients connecting will only get a
maximum speed of 11M.

I have included some of the IOS config ...

interface Dot11Radio0
no ip address
no ip route-cache
!
ssid tsunami
authentication open
guest-mode
!
speed basic-1.0 basic-2.0 basic-5.5 basic-11.0
rts threshold 2312
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
end

Now to see if 802.11b cards will support LEAP.

>Hi,
>
>Cisco, and no less others, seem to have a policy of not making
>such clashes clear. The documentation is full of statements that
>a device does this and a device does that however some obvious
>things like, 'it doesn't do this and that' at the same time are
>missing.
>
>The words "no" and "not", seem missing from the authors' vocabulary.
>It must be fun at home:)
>
>Anyway the documents do seem pretty clear(ish):-
>
>http://www.cisco.com/en/US/products/hw/wireless/ps430/
>products_data_sheet09186a00800937a6.html
>
>There are two radio modules available:-
>
>1. IEEE 802.11a
>2. IEEE 802.11b *or* IEEE 802.11g
>
>HOWEVER the 1200 series can apparently take two radios and if
>you want 802.11a support as well as b/g you need to install both.
>
>Maybe it can take two b/g radios and you can have a 'b' and a 'g'?
>
>The problem is that I suspect that 'g' is required to support 'b'
>as well and so Cisco can say that you can have 'b' and 'g' at the
>same time when you are really running on 'b'. It is true but
>maybe not exactly all that we might want to know.

Drop the ZZZ to reply

Cheers ...

Re: Providing services for 802.11b and 802.11g on the cisco 1200 access points
 

It seems I may have a small bug in my IOS software ..

Quote from cisco site ..

"On the 802.11g radio, the default option sets data rates 1, 2, 5.5,
and 11 to basic, and data rates 6, 9, 12, 18, 24, 36, 48, and 54 to
enabled. These data rate settings allow both 802.11b and 802.11g
client devices to associate to the access point's 802.11g radio. "

Although this looked to be set, after manually setting all the G
speeds to default and the B speeds to basic all seems to be ok.

One warning to anyone heading down this path .. make sure that any G
cards you are working with have the latest drivers and that any B
cards have the latest firmware as well.

Thank you to everyone who helped out with this problem.



On Mon, 14 Jun 2004 13:40:26 +0100, Chris Davies
<z400d3ZZZ@yahoo.co.uk> wrote:

>Hi All,
>
>I have an issue with the Cisco 1231G wireless access points.
>
>I have to provide access for clients with 802.11b cards and also
>clients with 802.11g cards.
>
>The documentation at the following URL's indicate that this is
>possible using the access point that I have mentioned.
>
>http://www.cisco.com/en/US/products/...0800937a6.html
>
>http://www.cisco.com/en/US/products/...430/index.html
>
>I also find the same information on the linksys site regarding their
>WAP54G wireless G access point.
>
>http://www.linksys.com/products/prod...id=35&prid=608
>
>I have trolled through the cisco website but I cannot find any
>information on how this can be achieved.
>
>I rang our suppliers and the engineer I spoke to informed me that this
>is not the case, you CANNOT enable 802.11b client card connections to
>a Cisco 1231G you have to buy the Cisco 1231b.
>
>I understood that the 802.11g standard allowed for backwards
>compatibility with 802.11b clients ?
>
>If anyone can help me out here I would be grateful ?
>
>Cheers ...
>Drop the ZZZ to reply
>
>Cheers ...

Drop the ZZZ to reply

Cheers ...