[ogf20pc] Network question

[Geoffrey Fox]

There are many times I have needed real IP's for demos as NATs do not 
support all connection models but I'm not giving a demo! Often it 
requires special tweaks of the client and/or good NAT configuration to 
enable connections. UDP can be especially hard for server side messages 
to get back to client

Stephen M Pickles wrote:
> Hi Massimo,
>
> In general, I would have thought that demos would not
> require inbound connectivity. I'm trying to flush out
> any exceptions to the general case now.
>
> We are already planning on wired connections to the 
> demonstrations. There will be some cost implications due
> to cabling and ducting and getting wires to each demonstration
> and each exhibition booth that needs it. (The cost is not
> negligible if the venues' default costing model -- per each --
> is applied, so we'll have to work on that.)
>
> We're negotiating on the basis of 1 Gbps.
> This is consistent with scaling up usage traces from
> OGF19 last week, and assuming that GGF16 was over-provisioned
> at 2 x 1 Gbps.
>
> Stephen
>
>   
>> -----Original Message-----
>> From: Massimo Lamanna [mailto:Massimo.Lamanna at cern.ch] 
>> Sent: 08 February 2007 16:49
>> To: Kristina Ulrika Gunne; Stephen.Pickles at manchester.ac.uk; 
>> ogf20pc at ogf.org; Steven Newhouse
>> Cc: Erwin Laure; Massimo Lamanna
>> Subject: RE: Network question
>>
>>  Hi Stephen et al.,
>> In general we do not require inbound connectivity.
>> The typical pattern is connecting and driving the demo via a 
>> web service
>> located elsewhere.
>>
>> I would like that the connection for demo (~20) could be 
>> copper instead
>> of wifi to protect them from network instabilities. Since anyway a
>> "cable" has to pulled to the exhibition room, this should not 
>> add to the
>> complexity (and cost) in any significant way.
>>
>> I agree on the assumption of IPv4 only.
>>
>> What is the uplink capacity you are negotiating?
>>
>> With my best regards,
>> Massimo
>>
>> -----Original Message-----
>> From: Kristina Ulrika Gunne 
>> Sent: Thursday, February 08, 2007 14:31
>> To: Stephen.Pickles at manchester.ac.uk; ogf20pc at ogf.org; Steven Newhouse
>> Cc: Massimo Lamanna; Erwin Laure
>> Subject: RE: Network question
>> Importance: High
>>
>>  Hi Stephen,
>>
>> I forward this request to the more technical people who I hope can
>> answer  your questions.
>>
>> Best regards,
>>
>> Kristina
>>
>> -----Original Message-----
>> From: Stephen M Pickles [mailto:Stephen.Pickles at manchester.ac.uk]
>> Sent: 08 February 2007 14:29
>> To: ogf20pc at ogf.org; Kristina Ulrika Gunne; Steven Newhouse
>> Subject: Network question
>>
>> All,
>>
>> A question has arisen regarding the network provision at OGF20 and
>> EGEE-UF 2.
>>
>> Is anyone likely to be running a demonstration in the exhibition that
>> will involve incoming connections?
>>
>> We need to be able to provide up to 900 or so IP addresses.
>> If all connections will be outgoing, it should be possible to do this
>> using Network Address Translation. If some connections will 
>> be incoming,
>> then it is likely that real IP addresses will be needed.
>>
>> An early response will be very helpful. Obtaining 900+ real 
>> IP addresses
>> will require some negotiation and cannot be guaranteed at this stage.
>> Adopting a hybrid solution of NAT for wireless and real IP 
>> addresses for
>> wired ethernet to the booths is possible, but would add complexity to
>> the network design and configuration.
>>
>> Stephen
>>
>> PS We're assuming IPV6 will not be required.
>>
>> ==================== Stephen M. Pickles ====================
>>
>> Technical Director, National Grid Service Manchester Computing Room
>> G49.1, Kilburn Building
>> The University of Manchester           tel: +44 161 275 5974
>> Oxford Road                            fax: +44 161 275 6800
>> Manchester M13 9PL          stephen.pickles at manchester.ac.uk 
>>
>>
>>
>>     
>
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>   

-- 
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