From: Peter McCreesh (petermccreesh@gmail.com)
Date: Thu Dec 22 2005 - 13:55:28 GMT-3
Hi Tim,
My understanding is (and it may be wrong) that the access point will know
that client A and client B are both out the radio interface due to its
association table (sh dot11 assoc). The frame it receives from Client A will
have a destination mac of client B (as Client A will issue an arp for client
B's MAC before sending frame - if it doesn't already know it) so the AP
should just forward it back out the radio interface.
I may be over simplifying here but would need to dig a little more to get
the exact process.
..Pete
On 12/22/05, Tim <ccie2be@nyc.rr.com> wrote:
>
> Hey Pete,
>
>
>
> Thanks, I think I'm starting to get the idea but I'm still fuzzy on
> something
>
>
>
> Let's say there's an AP and a bunch of wireless clients that are all
> associated with the AP.
>
>
>
> wireless client 1 wants to talk to wireless client B.
>
>
>
> What does the AP do when it receives a frame wireless client A?
>
>
>
> Does it do a mac address table lookup to determine that the frame from
> client A should be re-transmitted out the radio interface?
>
>
>
> It seems like an AP has only 2 choices when it gets a frame in on it's
> radio interface: It either re-transmits it back out the radio interface or
> it transmits it out the wired interface ( assuming the AP doesn't drop the
> frame.)
>
>
>
> Am I on track with this?
>
>
>
> TIA, Tim
>
>
> ------------------------------
>
> *From:* Peter McCreesh [mailto:petermccreesh@gmail.com]
> *Sent:* Thursday, December 22, 2005 11:19 AM
> *To:* Tim
> *Cc:* Arun Arumuganainar; ccielab@groupstudy.com
> *Subject:* Re: Way OT: Aironet AP's -- Functionally more repeater or more
> bridge?
>
>
>
> Hi Tim,
>
> The BVI interface gets the IP address and the Radio interface and ethernet
> interface are just placed in the bridge group of the BVI (group 1 by
> default).
>
> It just behaves like a bridge.
>
> If vlans are required you need to enable 802.1q subinterfaces on both the
> radio and ethernet interface(int dot11radio 0.6 & int fastethernet0.6.
> these will be assigned to a different bridge group than the main interface
> (eg vlan 6 subifs are both in vlan 6) but you will still only need BVI1 to
> communicate with the AP (just like the management IP on a switch)
>
> Hope this helps,
>
> Pete
>
> On 12/22/05, *Tim* <ccie2be@nyc.rr.com> wrote:
>
> Hi Arun,
>
> Thanks for your response but I don't really understand it.
>
> Any chance you can elaborate?
>
> Is the physical ethernet port (interface), used as an uplink to the wired
> portion of the network, actually a layer 3 interface and therefore gets an
>
> ip address?
>
> And, does the AP create a mac address table for the wireless clients to
> which it's associated?
>
> TIA, Tim
>
> -----Original Message-----
> From: Arun Arumuganainar [mailto: aarumuga@hotmail.com]
> Sent: Thursday, December 22, 2005 11:06 AM
> To: Tim; ccielab@groupstudy.com
> Subject: Re: Way OT: Aironet AP's -- Functionally more repeater or more
> bridge?
>
> Functionally they are another router and bridge tied together!!!
>
> Thanks and Regards
> Arun
> ----- Original Message -----
> From: "Tim" <ccie2be@nyc.rr.com >
> To: <ccielab@groupstudy.com>
> Sent: Thursday, December 22, 2005 8:41 PM
> Subject: Way OT: Aironet AP's -- Functionally more repeater or more
> bridge?
>
>
> > Hi guys,
> >
> >
> >
> > I'm starting to refresh myself on this WLAN technology and I was
> wondering.
> >
> >
> >
> > Would an AP be considered more a repeater or more a bridge?
> >
> >
> >
> > Or, does it depend on the topology?
> >
> >
> >
> >
> >
> > For example, suppose this were our 802.11 topology (and assume no ad-hoc
> > peering between pc1 and pc2)
> >
> >
> >
> >
> >
> >
> >
> > pc 1 pc 2
> >
> >
> >
> >
> >
> > AP
> >
> > |
> >
> > |-----------------------------------------------------------|
> >
> > |
> >
> > server
> >
> >
> >
> >
> >
> > When pc 1 is talking to pc 2 via the AP, is the AP acting like a
> repeater?
> >
> >
> >
> > And, when pc 1 is talking to the server via the AP, is the AP acting
> like
> a
> > bridge (switch) and thus building a mac address table?
> >
> >
> >
> > I've been reviewing lots of WLAN material but nothing seems to discuss
> this
> > issue.
> >
> >
> >
> > If these are really dumb questions, please accept my apologies and try
> to
> > set me straight.
> >
> >
> >
> > Thanks, Tim
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Mon Jan 09 2006 - 07:07:52 GMT-3