Yeah, this and the other reading I just googled up, certainly makes sense.
Thanks for the reply.
-bob
----- Original Message -----
From: "Brian H. Oak" <oakb@infosystems1.com>
To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Sent: Monday, February 03, 2003 4:59 PM
Subject: RE: [Karlnet] License-it site
> Bob,
>
> I'm not involved with KarlNet at all, nor with any development efforts
> at KarlNet. But, seeing as how I am at least fairly qualified in the
> "networking guy" arena, I thought I'd take a stab at answering your
> question.
>
> First, we need to take a look at what Layer 2 switching is like in the
> absence of VLANs. Layer 2 switches automatically limit the size of
> your collision domains by eliminating internal collisions. By using a
> variety of queuing techniques, the switch guarantees that frames
> passing through the switch will not collide with one another.
>
> Another benefit of Layer 2 switches is the idea of multiple concurrent
> conversations. A switch only floods unicast frames out the port to
> which it knows the destination MAC address is connected. This means
> that the only node that "hears" traffic is the node for which that
> traffic is destined. This leaves other nodes on other ports free to
> receive unicast traffic destined for them at the same time.
>
> For networks to work, however, the default behavior of a switch is to
> flood every Layer 2 broadcast frame out each of its ports. The same
> thing happens when the switch has to relay traffic to a destination,
> the MAC address of which the switch has not learned. In very large
> networks that are segmented by bridges (and a switch is just a bridge
> with more ports), and not by Layer 3 routers, this broadcast and
> unknown-destination traffic can bring the entire network to its knees.
>
> The concept of VLANs in Layer 2 switches is to add another layer of
> abstraction, to be able to limit the size of your broadcast domains.
> By identifying members of a VLAN, you can limit the flooding of
> broadcast and unknown-destination traffic to the ports associated with
> that VLAN. This can happen across the entire network, through
> multiple switches; traffic will only be sent where VLAN members are
> found.
>
> What benefit can be gained from VLANs in a wireless environment? The
> answer depends on your topology. If you are using the routing
> functionality provided by KarlNet, then the answer is no benefit. You
> are already segmenting your network at Layer 3, no Layer 2 broadcasts
> will propagate through your routers.
>
> If, however, you are bridging everything in your wireless network, the
> benefits of VLANs can be pretty significant. You can limit broadcasts
> so that they will not leave the segment serviced by a single AP,
> instead of propagating across your entire network. You might be
> surprised by the amount of bandwidth saved by doing this.
>
> TurboCell already addresses the problem of collision domain size with
> its intelligent base stations and their polling MAC. So long as there
> is only one radio interface through which traffic can be received from
> client nodes, I can't imagine any way to replicate true "multiple
> concurrent conversations" behavior in a wireless bridge. Adding VLANs
> to KarlNet software would add serious value for those who want to
> limit their broadcast domains while staying out of Layer 3 routing.
>
> I hope that, as long-winded as this was, it answered your question.
> Please let me know if you still have questions -- if I haven't scared
> you away or put you to sleep by now. :)
>
> -Brian
> ____________________________________________________________
> Brian H. Oak CISSP CCDP CCNP CCA NNCAS Datawav-IS, LLC
> Principal Engineer 109 N. Arthur Ave., Ste. 301
> (208) 232-6860 Pocatello, ID 83204
> (208) 232-0185 fax brian@infosystems1.com
>
>
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Bob Hrbek
> Sent: Monday, February 03, 2003 14:50
> To: Karlnet Mailing List
> Subject: Re: [Karlnet] License-it site
>
>
> can somebody explain to me the point of wireless vlans? I'm not a
> huge
> networking guy but my understanding of vlan is a virtual lan in a
> switching
> environment. The purpose being to segment the switch to create
> multiple
> logical switches. I know of two ways to divide the switch, (MAC based
> and
> Port based) but how would this benefit a wireless network? Your AP
> cannot
> be a controlled medium unless you are talking about making it so only
> CPEA
> and CPEB and the AP can talk to each other, etc. (hmm)
>
> Just wondering what your take on it was.
>
> -bob
> ----- Original Message -----
> From: "Dan Metcalf" <dan.metcalf@wbsysnet.com>
> To: "'Karlnet Mailing List'" <karlnet@WISPNotes.com>
> Sent: Monday, February 03, 2003 3:41 PM
> Subject: RE: [Karlnet] License-it site
>
>
> > Kevin,
> >
> > How soon can we expect the "auto-roam" and vlan updates?
> >
> > Dan Metcalf
> > Wireless Broadband Systems
> > http://www.wbsysnet.com/
> > 781-577-2780
> > dan.metcalf@wbsysnet.com
> >
> >
> > > -----Original Message-----
> > > From: karlnet-bounces@WISPNotes.com
> > [mailto:karlnet-bounces@WISPNotes.com]
> > > On Behalf Of Kevin Knuth
> > > Sent: Sunday, February 02, 2003 10:16 PM
> > > To: Karlnet Mailing List
> > > Subject: RE: [Karlnet] License-it site
> > >
> > > I will forward this to the appropriate people!
> > >
> > > Kevin
> > >
> > > -----Original Message-----
> > > From: karlnet-bounces@WISPNotes.com
> > > [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of andrew
> > > Sent: Saturday, February 01, 2003 9:44 PM
> > > To: Karlnet Mailing List
> > > Subject: RE: [Karlnet] License-it site
> > >
> > >
> > > kewl, since you are making all these changes, would it be
> possible
> > to
> > > have a page that returns a tab delimited file of all the licenses
> that
> > you
> > > have on your account? They want me to write a script here to
> track
> > all
> > > our licenses and match them to stuff that is in use. If there was
> a
> > way
> > > to
> > > get that from the site in an easy to parse way rather than having
> to
> > > script
> > > out the HTML that would be really handy!
> > >
> > > thanks!
> > > andrew
> > >
> > > At 12:18 PM 1/31/2003, you wrote:
> > > >As Karlnet moves to a distribution model we will continue making
> > changes
> > > to
> > > >the site.
> > > >
> > > >One of those improvements will allow you to combine your
> accounts.
> > > >
> > > >Kevin
> > >
> > > --
> > > andrew
> > >
> > >
> >
> /---------------------------------------------------------------------
> \
> > > | ICQ# | Proud Member of Mad-Techies.org
> > |
> > > | 253198 | http://www.mad-techies.org
> > |
> > >
> >
> |---------------------------------------------------------------------
> |
> > > | When you open Windows, bugs get in!
> > |
> > >
> >
> \---------------------------------------------------------------------
> /
> > >
> > > _______________________________________________
> > > Karlnet mailing list
> > > Karlnet@WISPNotes.com
> > > http://lists.wispnotes.com/mailman/listinfo/karlnet
> > >
> > > _______________________________________________
> > > Karlnet mailing list
> > > Karlnet@WISPNotes.com
> > > http://lists.wispnotes.com/mailman/listinfo/karlnet
> > > ---
> > > [This E-mail scanned for viruses by Declude Virus]
> >
> >
> > ---
> > [This E-mail scanned for viruses by Declude Virus]
> >
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> >
>
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
>
> _______________________________________________
> Karlnet mailing list
> Karlnet@WISPNotes.com
> http://lists.wispnotes.com/mailman/listinfo/karlnet
>
|