[f-nsp] ServerIronXL 16 or 24 port questions..

[Emilia Lambros]

The way I understood it when I researched it and subsequently set up
gslb, there needed to be ServerIrons at each location.  Requests are
handled by the way DNS is handled. 

 If you're using a remote server to have one server closer to where some
of your users will be, then when they get the DNS response, they're
given the response closest to them.  If you're doing it for redundancy
and you don't want anyone to hit that site unless everything else is
down, they're given the DNS of the primary site until none of those real
servers are available, then they're given the DNS for the redundant
site. 

 Its smoke, mirrors and DNS.  The ServerIrons actually have to have DNS
behind them to see the responses and change them if necessary, or they
have to provide the DNS for that (sub)domain themselves and they change
it if necessary.  They need to have control of the DNS in some way for
glsb to work.  Hard to grasp the first time you hear it, but the
ServerIrons can do DNS.


Cheers,
Em





-----Original Message-----
From: foundry-nsp-bounces at puck.nether.net
[mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of Michael
Bellears
Sent: Wednesday, 23 June 2004 4:08 PM
To: foundry-nsp at puck.nether.net
Subject: [f-nsp] ServerIronXL 16 or 24 port questions..

We are looking at purchasing one of the above devices, and primarily
want to use it for Global Load Balancing ("real" servers will be located
in geographic disperse locations.)

How is the above achieved on the ServerIron - Eg. For load-balancing of
a webserver: If we have one "real" server directly connected to the
ServerIron, and another "real" server co-located with provider x in
another country - How are requests handled?

 - All requests for the webserver are initially handled by the
ServerIron (Virtual Server IP), requests are forwarded to Real IP
(Server directly connected), and also to remote server (Does traffic
destined for this server go back out the Server Irons default GW?)

My other question is regarding the ServerIron switch ports - Must each
backend "real" server have a dedicated port, or can I connect a layer 2
switch to one of the ServerIron ports to give me greater capacity?

Thanks in advance.

Regards,
MB


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