[CentOS] Extending Network - OT

Fri Jan 6 22:16:09 UTC 2006
Bryan J. Smith <thebs413 at earthlink.net>

> Thanks for suggestions, have been very useful
> I would select:
> 1. Pay for a network engineer.

um-ahem.  ;->

> 2. Pay for new routers and make a more complex design for
> departments.

Nah, a good layer-3 stack would do nicely.  Of course, for
400 systems, that would be $5+K.

Heck, if cost is a real issue, even a layer-3 tier-1 and a
layer-2 tier-2 is doable.  That would be far less costly.

Remember, managed switches give you a lot of control over
your network, especially routing with layer-3.  It's cheaper
than you think.

> 3. just specify your network to be bigger than that. For
> example
> gives you 510 hosts

Yep, supernetting.

> router-------PC with 2NICS--------Institute LAN
>       real IP         
> Is supernetting available this way or can be used only
> between routers?

You don't need any routing if you're supernetting, other than
to get to the Internet.

If you're going to supernet, you might as well do 4+ class
Cs, or move to a class B.  I recommended supernetting because
I assume you don't want to have to change IPs (only subnet

> Actually I am with the third, because of financial issues.

Well, if you're buying equipment, you'd be surprised how
little it costs to put a layer-3 GbE switch at the top.  A
layer-3 twelve (12) port GbE is sub-$1,000 these days.

Underneath it you can use "dumb" layer-2 switches (just FE)
with GbE uplinks and at least localize somethings.  That's if
you're trying to do it on the cheap.

Bryan J. Smith     Professional, Technical Annoyance                      b.j.smith at ieee.org      http://thebs413.blogspot.com
*** Speed doesn't kill, difference in speed does ***