All things related to multicast

[Alan Crosswell <>]

Well, I'm not going to look myself, but if you are interested in
volunteering that would be great.
/a

Russell M. Kaurloto wrote:
> Alan,
> 
> You should look at Enteraysys Networks and their Secure Networks model?
> 
> Contact info:
> 
> Peter Baumann
> 
> Director, Western Region Sales
> 
> Enterasys Networks
> 
> 5201 Great America Pkwy
> 
> Suite 320
> 
> Santa Clara, CA 95054
> 
> C.  650-576-8804
> 
> O. 408-850-7250
> 
> F. 408-850-7251
> 
> E. 
> 
> 
> Russ
> 
> Dale W. Carder wrote:
> 
>>
>> Hi Alan,
>>
>> Yet another datapoint: I'll follow up with Xirrus.
>>
>> Dale
>>
>> On Apr 23, 2008, at 7:38 AM, Alan Crosswell wrote:
>>
>>> Thanks, Rich.  Here's the updated list:
>>>
>>> Meru - Debbie Fligor, Paul Roberts
>>> Aruba - Doug Wilkinson
>>> Cisco - Paul Roberts, Alan Buxey
>>> HP ProCurve - Matt Davy
>>> Trapeze - Rich Ingram
>>> Ruckus - anybody have contacts? Simon Lockhart recommends talking to 
>>> them.
>>>
>>> /a
>>>
>>> Richard N. Ingram wrote:
>>>
>>>> Hello-
>>>>
>>>> I would be happy to take this up with Trapeze.  We are just beginning
>>>> our implementation and have already talked to them a bit about 
>>>> multicast.
>>>>
>>>> Best regards,
>>>> Rich
>>>>
>>>>
>>>> Alan Crosswell wrote:
>>>>
>>>>> Thanks to everyone for volunteering.  What I have so far is:
>>>>>
>>>>> Meru - Debbie Fligor (Columbia uses Meru, so let me know if I can 
>>>>> help)
>>>>> Aruba - Doug Wilkinson
>>>>> Cisco & Meru - Paul Roberts
>>>>> HP ProCurve - Matt Davy
>>>>> Ruckus - anybody have contacts? Simon Lockhart recommends talking to
>>>>> them.
>>>>>
>>>>> This is a good start.
>>>>>
>>>>> /a
>>>>>
>>>>> Alan Crosswell wrote:
>>>>>
>>>>>> At the last Joint Techs, we discussed that now that we had IP 
>>>>>> multicast
>>>>>> on wired networks all figured out(;-), it was time to start over 
>>>>>> from
>>>>>> scratch with IP multicast over WiFi.  The following rough notes
>>>>>> collected some of the questions to send to WiFi vendors to get  their
>>>>>> responses.  I'm hoping some of you will volunteer to:
>>>>>>
>>>>>> a) Review these questions and improve upon them.
>>>>>> b) Fill in the answers where you know them.
>>>>>> c) Contact your WiFi vendor(s) and ask them to respond to the 
>>>>>> questions
>>>>>> d) Report back to the group with your findings.
>>>>>>
>>>>>> Please let me know if you can help with this.
>>>>>>
>>>>>> /a
>>>>>>
>>>>>> WiFi Multicast
>>>>>>
>>>>>> driven by apps: iTunes sharing, zattoo, arootz, IPTV, etc.
>>>>>>
>>>>>> Problems:
>>>>>>
>>>>>> - flooding to all APs serving an SSID since there's no snooping.
>>>>>> - multicast sent at broadcast base rate (1 Mbps) to ensure all 
>>>>>> listeners
>>>>>> hear it
>>>>>> - unicast tunnels between lightweight APs and controller replicate
>>>>>> traffic
>>>>>>
>>>>>> ... and some hope or workarounds:
>>>>>>
>>>>>> - IPv6 support requires multicast
>>>>>> - several vendors coming out with IGMP(MLD) snooping to:
>>>>>>  - distribute between controller and APs
>>>>>>  - limit traffic to only APs that have receivers associated
>>>>>> - some vendors using known state of slowest multicast receiver to
>>>>>> dynamically set the broadcast base rate.
>>>>>>
>>>>>> Questionnaire for vendors:
>>>>>> - please improve on these questions
>>>>>> - please volunteer to take to your vendor (or potential vendors)  and
>>>>>> report back to the group
>>>>>>
>>>>>> - How is multicast sent to AP from the controller?
>>>>>> - Is multicast flooded to all APs in the SSID or just to AP with
>>>>>> interest?
>>>>>> - Is IGMP snooping implemented?  What version(s)?
>>>>>> - What about IPv6?  IPv6 requires multicast.
>>>>>> - Is MLD snooping implemented?
>>>>>> - Can multicast base rate be set higher than the broadcast rate?  
>>>>>> What
>>>>>> are the limitations?
>>>>>> - How does multicast work w/WPA2 security?  Broadcast group key?
>>>>>> Multiple unicast?
>>>>>> - How does this work with 802.11n multipath?
>>>>>> - Is multiple unicast better due to retransmissions at 802.11  layer?
>>>>>>
>>>>>>
>>>>
>>