From: Jason Madsen (madsen.jason@gmail.com)
Date: Wed Jul 16 2008 - 14:00:51 ART
the semi-bootleg option if you can't do the preferred SLB option is to use
an IP Nat rotary group. With it you can assign all of your servers one
common virtual IP address. Here's some of the syntax if you aren't familiar
with this technology:
*ip nat pool WEBSERVERS 192.168.0.11 192.168.0.13 netmask 255.255.255.0 type
rotary (defines your server IPs)
ip nat inside destination list 1 pool WEBSERVERS (assigns a virtual address
to your server address pool)*
*access-list 1 permit 192.168.0.100 (here's your virtual IP address to
assign to your server group)*
you can do "show ip nat trans" to see that each request made by clients to
the virtual IP address uses the next server address in the rotary group.
keep in mind that SBL is preferred, but this solution most certainly does
work...test it out in GNS3 / Dynamips...just use the http server feature of
your routers if you want.
Jason
On Wed, Jul 16, 2008 at 9:50 AM, Joseph Brunner <joe@affirmedsystems.com>
wrote:
> This sounds like a good scenario for IP SLB, and or a CSM card...
>
> With a project this big, why are you not working with your local Cisco SE?
>
> that's what we pay them for.
>
> I would make a layer 2 trunk between the switches, keep the servers in the
> same vlan, and get a load balancers (if you cant afford the CSM blades, the
> css11500 is still an affordable option)
>
> -Joe
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> john
> white
> Sent: Wednesday, July 16, 2008 11:42 AM
> To: Cisco certification
> Subject: Help! Redundancy between two Layer 3 Switches
>
> Hi Gents,
>
> I have a situation here and would like your assistance. I am preparing for
> my ccie lab and this problem is killing me.
>
>
> I have two Cisco 6506 switches which i would like to configure for high
> availability (preferably both active at the same time). I also would like
> to
> run OSPF between the two switches
>
> I have servers that will be connecting to these switches. These servers are
> in pairs ( i.e two servers both providing the same service to the same
> clients and with same IP address)
>
> I plan to connect each server in a pairing to a different 6506 switch to so
> that in case of failure of one switch or one server, users can still access
> this service via the second server.
>
> The problem is ,
>
> If a server fails , how do the switches route / switch to the second
> server
> ( in the pairing)
> How do i connect these servers to the network bearing in mind they will be
> accessed with the same IP Address
>
> Please advice
>
>
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