Date   : Wed, 19 Oct 2005 21:29:03 +0100
From   : Matthew Fullerton <mf131@...>
Subject: Re: BBC TCP/IP

Phil Blundell wrote:

>On Wed, 2005-10-19 at 20:22 +0100, Matthew Fullerton wrote:
>  
>
>>Are there any restrictions on what addresses I can use? You can't specify a
>>netmask on the BBC, so I'm wondering if it wants an (AUN style?) class A
>>address.
>>    
>>
>
>My recollection is that the BBC expects classful addressing.  That is,
>it will look at the first octet of your local address, decide whether it
>is class A, B or C, and pick an "appropriate" netmask based on that.
>Admittedly, even ten years ago that was a bit of an anachronism, and
>today it doesn't really make any sense at all.
>
>So, in your case, it will almost certainly think that anything 10.*.*.*
>is on-link, and not use the gateway.  It's a bit unfortunate that *ROUTE
>doesn't diagose that.
>
>  
>
Yes, although right now I've made things very simple - telnet server on 
the A3000, so no routing should be necessary, for the moment.

>It'd probably be easy enough to change the code so that you could
>specify an explicit netmask.  Or, if you select a "class C" 192.168.x.x
>address, I imagine that would clear it up too.
>
>  
>
That might be a change worth looking into at some point. I've just tried 
changing the addresses. I configured the A3000 to not TCP/IP its 
ethernet interface, just the econet, with adress 192.168.0.89. I ran 
*IPADDR on the BBC again to make it 192.168.0.90. Unfortunately it still 
just sits there 'Trying...'. What test set up did you use when you were 
developing this? Maybe I can try and start from something close.

Matt

>p.
>
>
>
>  
>