How to build a fault-tolerant network on Cisco?

Question

Computer networks

I welcome the habra community. There was such task as in Cisco I am not strong I ask for the help from you.

We want the following scheme: we have 2 links from the provider, a group of ip addresses is configured on one of the routers, the second must have the same addresses, respectively, it will be a backup and it will raise them if the first router is unavailable, well, according to dynamic routing protocols they are associated with switches to which end servers are connected. The question is by what means it can be implemented and on what hardware. I would also like to know what kind of licenses we need.

Answer 1

to take backpractices from a cisco, then you need a pair of cisco 6500 vss switches, raise the entire third level on it

Under such topology? Are you kidding me? Then immediately Nexus 7k and vPC. Under ten servers, aha.

and as an accessory, you need to take pairs of catalist 3750

On them, too, it is quite possible to raise L3.
Auto RU. Take the ASA with an A/S failover. Choose the model yourself depending on the required power. Since a firewall is required anyway.
And the 3750th will perfectly cope with routing from asashek to servers, as well as between servers.

Answer 2

If you take backpractices from a cisco, then you need a pair of cisco 6500 vss switches, raise the entire third level on it, and as an accessory, you need to take pairs of catalist 3750 stacked together. then the loss of any element will not affect the overall performance.