From: David Prall (dcp@dcptech.com)
Date: Fri Sep 12 2003 - 11:55:21 GMT-3
Brian,
Actually Distributed Director is what Alex asked for:
"How do I config routers(located in HQ) so that upon detecting web
server(located in HQ) failure,incoming http request is directed to another
web server with same content located in branch office?"
Distributed Director configured as an HTTP Agent, or as DNS server will do
it perfectly. Configuring as DNS server will allow for redundant
configuration at multiple sites should the connection fail as well.
David
Brian McGahan <mailto:bmcgahan@internetworkexpert.com> wrote:
> David,
>
> You're thinking of Local Director. Distributed Director is when
> you have mirrored servers that are in difference geographic locations.
> Local Director is when you have mirrored servers that are on the same
> local segment. The Local Director feature is now supported in IOS as
> 'Server Load Balancing'.
>
> As the name implies, server load balancing is used to distribute
> traffic between multiple servers. Usually these servers would be on
> the same logical segment (ip subnet), but you can also use NAT with
> SLB so that the servers can be on separate segments. With the
> 'Automatic Server Failure Detection' feature, the device running SLB
> monitors how many TCP sessions fail to connect to a particular server
> in the farm. If the failed sessions exceed a certain threshold, the
> server is declared down and taken out of service.
>
> For syntax and more info:
>
> 'Configuring Server Load Balancing'
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/product
> s_configur ation_guide_chapter09186a00800ca75d.html
>
>
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 708-362-1418 (Outside the US and Canada)
>
>
>> -----Original Message-----
>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>> Of David Prall Sent: Friday, September 12, 2003 7:55 AM
>> To: 'Alex Hsieh'; 'CCIE R&S Mailing list'
>> Subject: RE: Web server redundancy
>>
>> nobody@groupstudy.com <mailto:nobody@groupstudy.com> wrote:
>>> hi gangs:
>>>
>>> How do I config routers(located in HQ) so that upon
>>>
>>> detecting web server(located in HQ) failure,incoming http
>>>
>>> request is directed to another web server with same content
>>>
>>> located in branch office?Thanks.
>>>
>>> regards
>>> Alex
>>>
>> This is the old Distributed Director platform. This was integrated
>> into IOS recently on other platforms 2600/3700/7200.
>>
>> Here is configuration
>> http://makeashorterlink.com/?N297521E5
>>
>> David
>>
-- David C Prall dcp@dcptech.com http://dcp.dcptech.com
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