The Ethernet standard maximum packet size is 1500 bytes (not counting the
header).  You can use jumbo frames in GigE applications, but not in 10/100, and
not all switches support them, because there is no standard.

 


Jeff Broadwick
ImageStream
800-813-5123 x106
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Charles Wu
Sent: Wednesday, July 26, 2006 11:11 AM
To: 'WISPA General List'
Subject: RE: [WISPA] frame size and fps - Mikrotik large packets

The other day, I was trying to configure the mtu setting on a Mikrotik, and even
though the manual said it supports up to 1600-byte -- the interface
configuration won't let me set anything above 1500

Anyone? Tricks? Thoughts? Suggestions? (Tom -- you mentioned in the post that
you tested Mikrotik w/ large packets)?

-Charles

-------------------------------------------
WiNOG Wireless Roadshows
Coming to a City Near You
http://www.winog.com 



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Tom DeReggi
Sent: Tuesday, June 20, 2006 6:44 PM
To: WISPA General List
Subject: Re: [WISPA] frame size and fps - was OT: about 70Mbps for under $ 6K


I only mentioned Mikrotik as its abilty to pass large packets has been tested.
I believe we couldn't do that with StarOS as a limitation of Wifi clients
(although not positive, as I did not investigate WDS options on StarOS which

allows the large packets and full passing bridge features.) With that asside, I
guess it would be fair to consider StarOS, Ikarus, and Mikrotik as

the same class product. I actually wanted to classify it by hardware class such
as OEM Atheros products. But technically thatdefinition would include Alvarion.

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


----- Original Message -----
From: "Charles Wu" <[EMAIL PROTECTED]>
To: "'WISPA General List'" <wireless@wispa.org>
Sent: Tuesday, June 20, 2006 3:15 PM
Subject: RE: [WISPA] frame size and fps - was OT: about 70Mbps for under $ 6K


Hi Tom,

Not to add another "chink" to your debate -- but it is worth noting that
Mikrotik is more of a "jack of all trades" solution (they do routing, hotspot,
etc) than a wireless solution

While they do an ok job w/ wireless, IMO, their strength is more the convenience
coming from the integration of multiple packages and its flexibility rather than
the performance of any single feature

If you're looking at purely a "wireless" solution (in this "do-it-yourself"
genre) -- you need to include Star-OS / Ikarus in your evaluation (but then,
documentation gets a bit sparse there...)

-Charles

-------------------------------------------
CWLab
Technology Architects
http://www.cwlab.com



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Tom DeReggi
Sent: Monday, June 19, 2006 5:37 PM
To: WISPA General List
Subject: Re: [WISPA] frame size and fps - was OT: about 70Mbps for under $ 6K


Paul,

Although many have reported very high speeds with Mikrotik. Our live tests in
noisy environments (wether accepted as accurate or not) showed we were not able
to get the peak speeds out of Mikrotik where we could get them from

Alvarion. Our comparative tests were done with the Alvarion ver 3 firmware (not
4 yet). The Alvarion speeds that we got were right on the numbers with the
speeds test Alvarion tech support sent us. Actually our tested speeds were a bit
higher in some some cases.  (Take note we only got accurate speeds when we hard
set modulation to optimal (picked the best one for the
situation) modulation for testing).

I do not mean this as a negative comment on Mikrotik. Our competition to
Alvarion is NOT Trango, Trango does not yet have a 20 mbps product for PtMP.
We look at our Trango as the best choice to tackle the worse noisy environments
(for us almost everywhere :-) Our competition for Alvarion is actually Mikrotik.

Mikrotik probably has the single highest value from a feature cost perspective.
Why pay Alvarion price, when Mikrotik can do almost the same thing at a fraction
of the cost.  Mikrotik has changed this market and forced competing vendors to
look at how to be more competitive.  Mikrotik is

doing what Trango did 4 years ago to drive the price down.  (I'd argue that
Trango is still doing it also).

It will be real interesting to see how Alvarion performs side by side to
Mikrotik. The initial look show to me that Alvarion adds significant features
that make it the premium choice, possibly the leader in OFDM today,

if price not part of the consideration. However, Mikrotik's flexibilty and price
clearly will keep them a major player for many WISPs.

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


----- Original Message -----
From: "Paul Hendry" <[EMAIL PROTECTED]>
To: "'WISPA General List'" <wireless@wispa.org>
Sent: Friday, June 16, 2006 3:45 PM
Subject: RE: [WISPA] frame size and fps - was OT: about 70Mbps for under $ 6K


> Are these figures in the lab? I have seen similar with a 
> Mikrotik/N-Streme solution.
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> On Behalf Of Patrick Leary
> Sent: 16 June 2006 19:57
> To: WISPA General List
> Subject: RE: [WISPA] frame size and fps - was OT: about 70Mbps for 
> under $ 6K
>
> So I have more data for you Matt I just received about what firmware 
> 4.0 delivers in terms of frame sizes and what it can mean to the 
> business case. Remember, this is multipoint, not PtP. All Mbps numbers 
> are NET
> throughput:
>
> Frame size Upstream Mbps/FPS Downstream Mbps/FPS
> 64 32.18/47893 40.29/59952
> 128 34.7/29308 43.79/36982
> 256 37.68/17065 45.03/20392
> 512 38.41/9025 45.51/10693
> 1024 37.02/4432 44.82/5366
> 1280 38.93/3743 45.99/4422
> 1518 36.69/2982 44.63/3627
>
> This is a dramatic improvement, first in terms of net throughput the 
> numbers are huge and I am pretty sure no other PMP system can get 
> close to them. But
> the main accomplishment is a total leveling of capacity regardless of the
> frame size. This results in much higher predictability and ability to
> capacity plan. This takes net throughput over 700% higher using small
> 64bit
> frame than the previous version. Frankly it really is an exceptional
> achievement that will enable operators to offer very high value services
> even to large enterprise. With this version of BreezeACCESS VL an operator
> could sell an 8 voice lines/6Mbps of data to 20 enterprise customers in a
> single sector with a 5:1 over subscription with a voice MOS of 4.0 or
> higher. And with a SOHO type service like 2 voice lines and 3Mbps of data
> you could have 160 customers PER sector at a 20:1 over subscription. That
> will produce some exceptional ARPU.
>
> Patrick Leary
> AVP Marketing
> Alvarion, Inc.
> o: 650.314.2628
> c: 760.580.0080
> Vonage: 650.641.1243
>
> -----Original Message-----
> From: Matt Liotta [mailto:[EMAIL PROTECTED]
> Sent: Friday, June 16, 2006 6:47 AM
> To: WISPA General List
> Subject: Re: [WISPA] OT: about 70Mbps for under $6K
>
> Patrick Leary wrote:
>
>>Matt, to further your comments that you see WISPs providing layer 2
> transort
>>for carriers.
>>
> We have multiple CLECs and non-CLECs buying layer 2 transport from us 
> now. All are used to buy alternative access from fiber providers and 
> therefore fixed wireless was a naturally next step. Further, almost 
> all indicated they would have done it sooner, but the fixed wireless 
> companies they approached weren't willing to offer them layer 2 
> transport.
>
>>How about VoIP? How many of you consider VoIP to be an important part 
>>of your service future as a WISP? If so, how do you plan to support 
>>since it cannot be done decently with the other popular 5GHz 
>>solutions. That's not my opinion so much as the opinion of many larger 
>>Trango and Motorola WISPs I have been talking to lately.
>>
>>
>>
> We are doing a significant amount of VoIP now. We have VoIP customers 
> running on top of both Trango and Canopy radios. Canopy is a 
> significantly better solution for VoIP since we can properly 
> prioritize voice with Canopy, while we cannot with Trango. We also 
> wholesale VoIP to other operators and help them --if they require it-- 
> with getting their network ready to support VoIP.
>
>>If a key goal of WISPs is growing ARPU, what are WISPs plans for doing 
>>that with whatever your current technology permits?
>>
>>
>>
> I believe VoIP is the number one way to grow ARPU and the fact that we 
> bundle VoIP is why I believe we have one of the highest ARPUs in the 
> industry.
>
> -Matt
>
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