[PLUG] WRT54G DHCP - always serve the same IP address to a particular device?

[Richard C. Steffens]

Is it possible to tell my WRT54G to always serve the same IP address to 
a particular device?

I have a ReplayTV 4080 (hereinafter referred to as RTV) digital video 
recorder. It is no longer in production although there is a community of 
users providing some support. I am using software provided by a segment 
of that community to allows me to sit at any of the computers in the 
house and manage the RTV. It depends on knowing where to find the RTV. I 
set the RTV to use a static IP address but there is a bug in the RTV's 
firmware. When first started up it uses the assigned IP address. But 
after some indeterminate amount of time it ignores the fact that it has 
a static IP address and goes looking for one supplied by a DHCP server, 
which in this case is my WRT54G router.

The support group offers two solutions. One is to have the DHCP server 
reserve an IP address for the RTV. Can I do that with my WRT54G?

The other is to change the lease time to longer than a week. I'm not 
sure how this helps, but that was what was recommended. I think it has 
to do with the RTV rebooting itself more than once a week. But why the 
lease duration would make any difference to the RTV when it's DHCP bug 
kicks in isn't clear to me.

The better, longer term solution will be to build a Myth box. But until 
then I'm stuck with trying to make this RTV work.

Any ideas will be appreciated.

-- 
Regards,

Dick Steffens