[rescue] Looking for servers and net equip in Ireland/UK

[Chris Byrne]

The phrase comes from the way a network diagram drawn to represent the
configuration looks.

Basically a layer three switch allows you to create logically segmented
(common signal isolated) virtual LAN's commonly called VLANs. The problem
with that is if machines one vlan need to talk to machines on another vlan,
even on the same switch, they can't without a little extra going on.

The solution is to provide some kind of routing between vlans. There are two
ways of doing that, either internal to the switch, which is fast, reliable,
all is good and holy etc... etc... or you can send the packets out to a
router, either by having a port of the router connected to each vlan, or by
having a single trunked (or isl) port sending data up to the router, hence
router on a stick. It's slow, resource inefficient, wastes at least one port
on the switch and one on the router, and is generally bad and unholy etc...
etc...

Oh and of course it means you need to buy a router that can do it anyway,
thus increasing the overall cost to the point where you should have just
bought a switch that can do it itself.


Chris Byrne

-----Original Message-----
From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On
Behalf Of Joshua D. Boyd
Sent: 03 July 2001 16:02
To: rescue at sunhelp.org
Subject: RE: [rescue] Looking for servers and net equip in Ireland/UK


What exactly does the phrase router on a stick mean?  Obviously it is a
derogotory term for a type of router, but beyond that...

--
Joshua Boyd

On Tue, 3 Jul 2001, Chris Byrne wrote:

> Well eventually I would like to make the 2600's go away, unfortunately
they
> are what the funding would pay for. My personal choice would be to do the
> whole thing with a pair of Big Iron 8000's or summat, but our funding
wants
> us to use cisco, and won't buy 3600's for some reason (or 4006, or 6509,
or
> anything alse of any use for that matter).
>
> Oh and I heartily agree, router on a stick is an utter waste of
> time/resources/money etc... etc...
>
>
>
> Chris
>
> -----Original Message-----
> From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On
> Behalf Of James Fogg
> Sent: 03 July 2001 13:59
> To: rescue at sunhelp.org
> Subject: RE: [rescue] Looking for servers and net equip in Ireland/UK
>
>
> Cool, but if these are just colo sites you probably don't need the layer
3.
> I
> am a huge advocate of using layer 3 switching with VLAN's and I get angry
> with
> "router on a stick" designs, so you won't find any argument from me. But,
if
> every box talks to the 2600 and they don't communicate heavilly amongst
> themselves then you can do this without the Cat2948gl3's and save tons
(and
> keep your vlans too).
>
> http://www.sunhelp.org/mailman/listinfo/rescue
>
> _______________________________________________
> rescue maillist  -  rescue at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/rescue
>

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