[Gb-ccb] 4pm telecon

[John Ford]

>
> On Wed, 5 Oct 2005, Richard Lacasse wrote:
>> One topic that needs discussion today is what we plan to do with the
>> ID bits on the CONSOLE/JTAG front panel connector.  The original
>> idea was to use these bits to identify what the ccb was connected
>> to, Ka receiver, test fixture or 3mm.  Is the software in fact doing
>> this and if so, what logic levels should be seen on these pins when
>> we connect the CONSOLE port cable in the receiver room?
>
> Although I read these bits and return them as part of the monitoring
> data, they aren't actually used to determine the IP address as
> originally intended. This turned out to be unneeded, since the DHCP
> server here is capable of assigning fixed IP addresses to a given
> computer, based on its unique ethernet address. The DHCP method is
> also more convenient than the original scheme, because it can assign
> different addresses according to which IP address domain the computer
> is plugged into. This is important, because the IP domain in the lab
> differs from that of the GBT.

It's also inconvenient in that if you replace the CCB you'll have to
adjust the DHCP server to tell it that the new MAC address should go with
the old IP address.  The beauty of the original idea is that the IP
address remains fixed for a CCB connected to a specific receiver.  In the
new scheme, we'll have to call out computing when we replace a CPU module
or complete CCB.  That's not really what we want to do, I think.

JOhn


John

>
> Martin
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