[Server-devel] AP with fixed IP address

[Jerry Vonau]

John Watlington wrote:
> I think Jerry misunderstood your question.
> 
No, just away for my computer. The next question was to ensure that the 
AP was really for use with the XOs and not for an ISP.

> You can assign the AP an address from the range 172.18.1.1 to  
> 172.18.1.254.
> This is within the address range assigned to eth1 (in /etc/sysconfig/ 
> network-scripts/ifcfg-eth1)
> but outside of the range that DHCP is set to provide on that  
> interface (.0.2 to .0.254)
> 
> Other parameters for machines located statically on the school LAN  
> (eth1):
> NETMASK  255.255.254.0
> GATEWAY 172.18.0.1
> 
Thanks, forgot that there is a range parameter for the 0.0/23 network in 
the dhcp config.


> Cheers,
> John
>
Thanks,
Jerry


> On Aug 20, 2008, at 6:13 AM, David Leeming wrote:
>> Hi Martin,
>>
>> To clarify, I am talking about a minimal set up of a school server.  
>> Just
>> burning the image on a computer that has two network cards  
>> installed, and
>> following the instructions on the school server wiki page to change  
>> the
>> domain name and register an ejabberd admin account.
>>
>> I am then using a simple access point device like a D-Link 2100AP,  
>> set to
>> get an IP address from a DHCP server, plugged in to the second  
>> network card.
>> With this simple configuration, I have found that it then works  
>> without any
>> more changes to any config files etc.
>>
>> My question is, with a particular type of AP that I am required to  
>> use,
>> which uses a fixed IP, what config changes do I need to make in the  
>> XS? The
>> AP cannot be set to get an IP address from the XS.
>>
>> Is this clear enough?
>>
>>
>> David Leeming
>> OLPC Coordinator, SPC and Technical Advisor, People First Network
>> Honiara, Solomon Islands
>>
>>
>> -----Original Message-----
>> From: Martin Langhoff [mailto:martin.langhoff at gmail.com]
>> Sent: Wednesday, 20 August 2008 10:18 a.m.
>> To: David Leeming
>> Cc: server-devel
>> Subject: Re: [Server-devel] AP with fixed IP address
>>
>> 2008/8/20 David Leeming <leeming at pipolfastaem.gov.sb>:
>>> I am setting up a server using a outdoor access point from Rural Link
>>> (www.rurallink.co.nz) at our Patukae OLPC trial school site in  
>>> Solomon
>>> Islands. It's a type that can't get an IP address from a DHCP  
>>> server and
>> on
>>> the LAN side needs to be fixed.
>> Jerry's answer is correct. Edit ifcfg-eth0
>>
>>> Normally I have found, when setting up the XS, that if I attach a  
>>> simple
>> AP
>>> to a second NIC using eth1, with DHCP, there is no additional
>> configuration
>>> required. It works by default.
>> That sounds wrong. Maybe I'm misunderstanding what you've done but
>>
>>  - eth0 is the WAN address. Attaching something to eth1 does not solve
>> anything unless you've got eth0 and eth1 mixed up...
>>
>>  - On the LAN side (eth1) don't let the AP act as a router or give
>> DHCP leases. Set it to be a vanilla AP, no DHCP, routing or NAT'ting.
>> It is up to the XS to do routing, NAT'ting, handing out DHCP leases
>> and providing DNS services.
>>
>>> In the case of my Rural Link access point, I need to fix an IP  
>>> address
>>> within the range given by the server - which presumably it also  
>>> uses to
>>> allocate addresses to the XOs.
>> So you are talking about 2 XSs and want one of the servers to be
>> 'downstream' of the other? That'll need a bit of routing glue
>> methinks. Tell us more about the network topology you're setting up...
>>
>> cheers,
>>
>>
>> m
>> -- 
>>  martin.langhoff at gmail.com
>>  martin at laptop.org -- School Server Architect
>>  - ask interesting questions
>>  - don't get distracted with shiny stuff - working code first
>>  - http://wiki.laptop.org/go/User:Martinlanghoff
>>
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