Good guess I am thinking. Thanks Jason. On 16 September 2011 06:36, Jason Boyers <[email protected]> wrote:
> Let me preface this with the fact that this is a complete guess. But, it > is based on the nature of infrastructure versus client multicast modes for > the workgroup-bridge. > > The "mobile station" command is used to allow workgroup bridges to scan for > and roam to another access point before losing its previous association. > With the infrastructure mode, if the WGB doesn't send an acknowldgement that > it received a multicast or broadcast packet, the transmitting AP retransmits > the frame. > > So, let's imagine a scenario where a WGB in "mobile station" mode is moving > between root APs. The AP that it had been connected to doesn't yet sense > that the AP is no longer associated. So, it sends a multicast/broadcast > frame. Since the WGB is no longer associated, it won't send an > acknowledgement that it received the frame. Thus, the AP will continue to > retransmit until it reaches the max retransmit value for the frame. Until > then, it is using RF unnecessarily, potentially degrading the performance of > other devices in its area. > > > Jason Boyers - CCIE #26024 (Wireless) > Senior Technical Instructor - IPexpert, Inc. > Mailto: *[email protected] > * > > On Thu, Sep 15, 2011 at 6:14 AM, Leigh Jewell <[email protected]>wrote: > >> I was reading the WGB section again: >> >> >> http://www.cisco.com/en/US/customer/docs/wireless/access_point/12.3_7_JA/configuration/guide/s37hot.html#wp1040354 >> >> >>> You should use a workgroup bridge as a client device if these conditions >>> are true: >>> >>> • More than 20 workgroup bridges associate to the same access point or >>> bridge >>> >>> • The workgroup bridge associates using an SSID that is not an >>> infrastructure SSID >>> >>> • *The workgroup bridge is mobile * >>> >> The first one I understand. >> >> The 2nd one I can confirm with testing it to be the case that if the WGB >> isn't on the native VLAN you can't do reliable multicast (i.e >> infrastructure-client can't be used on the root). >> >> The 3rd one I don't understand. I can configure it fine but it says not to >> do it. >> >> Any thoughts on why you wouldn't use reliable multicast with a mobile WGB >> ? >> >> Cheers, >> Leigh >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com <http://www.platinumplacement.com/> >> >> >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
