GSS/CSS - Design Question for Hot/Standby Site

[nsurginer]

Hi,

I've been doing weeks worth of reseach without getting clear answers, so hopefully I can get a better understanding with everyone's help here.

I basically have a client that has a live web and sql server at our main data center, and wants to failover to our standby datacenter if their servers go down.

They're not doing local load balancing or anything else, so the box simply needs to redirect traffic to the standby site if the primary fails. 

I've heard so many conflicting answers about the CSS and GSS and not to use this or that, etc.

I want to install a single box inititally at the primary location that probes their server and forwards traffic to the live site.  If it fails, then it forwards traffic to their standby site.  Having said that, can I get away with a single CSS box with enchanced license, or do I need a GSS box?  Or is it necessary for me tohave two of either one?  I've been looking at the CSS 11501, and GSS 4490/4491.

The primary and standby site both have Cisco ASAs sitting on their front end.

Thanks for any input.  I can provide a basic diagram if needed.

[info]

After a log of digging, I found this post:

https://supportforums.cisco.com/thread/2010943?decorator=print&displayFullThread=true

This is basically the exact thing I'm trying to accomplish.

A new question though, is this setup supported under the standard license?  If I wish to use DNS, then I'd need enchanced correct?

Thanks,

Nathan

[litrenta]

IF you are not load balancing then a GSS is you best solution

GSS is made authoritive for the domain for the site.

create answers for servers at site 1

configure keepalives for these answers (tcp , icmp, http )

do the same for site 2

add these answers to an either a single answer group with site 1 answer having order 1 and site 2 answer having order 2 then choose ordered list as LB method, site 2 answer will only be given out if site 1 answer fails.

see:

http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/gss4400series/v3.1.1/configuration/gui/gslb/guide/gui_gslb.html

[nsurginer]

I'm still looking into possibly using a GSS.

I do currently have a CSS 11501 with the standard license.  It does what I want except I'm curious as to having a sorry server on a different subnet. 

Basically have the primary server on 10.10.10.5, but the sorry server is located on a totally different network and has an IP of 10.20.20.5.  When I tried it, the vip would just sit there awhile and then timeout forwarding to the sorry server.