Question about setting up a highly redundant small network for one mission critical application running on a single server with a dual nic.
Posted on 2004-04-02
Hi I am trying to make a complete highly redundant small network for one mission critical application running on a single server. I want to use one server with dual network cards using the same IP, 2 Cisco switch and 2 Cisco routers each connected via separate T1s to the same provider (direct connection – separate POP (loops))
I need to have it so that if one of the server’s network cards, a switch and a router fail I will still have network connectivity to my destination.
Cisco 26xx router = router1
Cisco 26xx router = router2
Catalyst 29xx = switch1
Catalyst 29xx = switch2
ServerA dual nic port1 = ServerAnic1
ServerA dual nic port2 = ServerAnic2
ServerAnic1—switch1—router1—direct connection same location as router2-PROVIDERa
ServerAnic2—switch2—router2—direct connection same location as router1- PROVIDERa
I need to see if I can get redundancy for the following. (if it not possible for both I need at least #1.)
1. ServerAnic1 and router2 FAIL, both switches up.
2. ServerAnic1, switch1 and router2 FAIL.
Is this possible? If so, what Cisco switches and routers models would I need?
Briefly, what would the configuration of the switch and router look like?
Would I use a 2621 and plug one of the Ethernet ports into each switch?
Would I hook one of routers Ethernet ports to the other router?
Would it be the switch or the router which the failure would be resolved with?
What would be the HSRP configuration?
Would I need a switch that does internal routing?
Would I need to just have 1 cross-over between each switch?
Would there be a problem caused by having one IP address for the server (set by Load balanced or fault tolerance) and plugging each network card into a different switch?
Thanks you for your help.