[Info-vax] ES47 expansion box problem

[chris]

On 11/29/21 18:13, Martin Vorländer wrote:
> Bill Hall<bill.hall at navistar.com>  schrieb:
>> Martin Vorländer wrote:
> ...
>>> When I power up the expansion box, I see "duplicate IP address 0xa0000001"
>>> error messages in the MBM. When removing power from the ES47, powering up
>>> the expansion box, connecting my laptop to the NAT box and telnetting to
>>> 10.0.0.1 I find myself in a MBM shell, which I guess is provided by the
>>> expansion box' PBM module.
> ...
>> IP addresses are determined by drawer ID number, so each drawer must have
>> a unique ID number that is set using the ID Select switch on the front of
>> the drawer. If you are building an ES47 Model 2, the 2P drawer should have
>> an ID of 0 and the I/O drawer should have an ID number of 1.
> ...
>> Bill
>
> Thanks for the confirmation. That's exactly how I set up this ES47 M2.
>
> The fault was in the seating of the PBM module. After re-seating it, it
> did come up as an expansion box PBM with the appropriate IP address.
>
> So, a PBM module which does not "see" it's sitting in an expansion drawer
> seems to think it's an ES47 :-)
>
> cu,
> Martin

It's not a bad plan with older kit that is rarely powered down or given 
any kind of attention is to reaeat all the connectors. Ribbon cables,
memory, m/b power connectors and anything else that is unplugable.

MTBF charts tell us that connectors of any sort are the least
reliable part of any system...

Chris