[conspire] corrected to HP LaserJet4M Plus Re: HP LaserJet4 - CUPS lists printer twice
ruben at mrbrklyn.com
Sat Aug 29 22:48:08 PDT 2009
On Sat, Aug 29, 2009 at 10:29:18PM -0700, Rick Moen wrote:
> Quoting Ruben Safir (ruben at mrbrklyn.com):
> > It used to be at NYU when I was trying to keep track of 400 devices and
> > my crack tech support guys would decide on their own to give static IP
> > addresses to printers and MS boxes in the deans office.
> Oh, I've lived the headache of dimwits badly handling IP assignments.
> (Don't get me started.) However, that doesn't change the fact that
> competently assigning static IPs to network-service-providing hosts --
> which includes printers -- reduces hassles on balance by decomplicating
> your network and reducing the number of failure modes to worry about
> (as cited upthread). Yes, you do need to keep track -- though there are
> also not-difficult ways to find statically-assigned hosts you've
> forgotten about or aren't aware of.
> > I forgot about that.
> Glad to help. ;->
> I forgot to mention: If you are using switches rather than hubs, the
> MAC addresses in any single machine's ARP cache will be limited to what
> the switch allows it to see. Of course, if you're just trying to find
> out a single device's MAC, then a crossover ethernet cable with _no_
> hub or switch does the trick.
> > Why is RARP dead?
> Because DHCP obsoleted it.
>  In fact, with most machines' ethernet ports these days being
> autoswitching, a regular straight-through cable will be fine, too.
> However, personally, I like to keep an old hub around, specifically
> because it's too dumb and simple to cause problems when I'm doing
> network exploration and diagnosis.
I have all these old switches around and they are set to do no
firewalling and to allow all traffic, including broadcast. What is
weird is that every once in a while, usually at an installfest, one of
them goes haywire and suddenly decides to block port 80 or some other
such stupidity. I pull it out and throw another Synoptics spare in and
all is fine...and then a few months later if I put the old one back, it
works fine. I should just replace them all with hubs. I hate
switching. JUST ROUTE and PASS THE PACKETS and get out of my way..
I'm gonna go crash...signing off from the east coast..
Happy Birthday Schmuel-Lieb Eliezar... and work tomorrow pushing
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"> I'm an engineer. I choose the best tool for the job, politics be damned.<
You must be a stupid engineer then, because politcs and technology have been attached at the hip since the 1st dynasty in Ancient Egypt. I guess you missed that one."
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