Are you using GUI firmware that perhaps has an IP addresses statically assigned for both the unit and the server?? If so you can clear it with a stop+c if using a Sun keyboard or Ctrl+Pause+C on a non-sun keyboard.

Michael Jinks wrote:
I have a DTU here (SunRay 270) which has somehow gotten stuck on the
idea that its IP address is 192.168.1.100; this in spite of the fact
that it's plugged in to a dedicated network with a Sun Ray server
network at 192.168.128.0/24 and no other devices present.

I know that the network is hooked up; snoop on the server sees traffic
from the DTU, like so:

  OLD-BROADCAST -> BROADCAST    DHCP/BOOTP DHCPDISCOVER
   192.168.1.1 -> (broadcast)  ARP C Who is 192.168.1.100, 192.168.1.100 ?
   192.168.1.1 -> BROADCAST    DHCP/BOOTP DHCPOFFER
  OLD-BROADCAST -> BROADCAST    DHCP/BOOTP DHCPREQUEST
   192.168.1.1 -> BROADCAST    DHCP/BOOTP DHCPACK
  192.168.1.100 -> BROADCAST    DHCP/BOOTP DHCPINFORM
   192.168.1.1 -> (broadcast)  ARP C Who is 192.168.1.100, 192.168.1.100 ?

Repeated reboots of the DTU have failed to make any difference.  Is
there some kind of hard reset trick I can do?  Or might I just have a
broken DTU?

Thanks,
--Michael
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