Failover routing design help Needed

[support systemsGo]

Hello.

We are looking to have a setup like this:

                                                      User PCs

                                                            |

                                                            |

                                                            |

                                                          3750x

                                                  (stack - ip base)

                                                    /                  \

                                                   /                    \

                                                  /                      \

                     Servers---------------3750x ---------------- 3750x---------------- Servers

                                            (stack -              (stack -

                                          ip services)         ip services)

                                                 |                         |

                                                 |                         |

                                                 |                         |

                                                 |                         |

                                            Router                 Router

                                                 |                         |

                                                 |                         |

                                                 |                         |

                                              ISP1                   ISP2

We would like to have routing (and vLans) done on the switches, and have internet failover from ISP1 to ISP2 if ISP1 fails, and go back to ISP1 when it comes back up. Trunks between all switches. We also would like to have all devices on the same vLAN if possible.

What is the best approach to do this?

(Note that left and right sides [in brown and green font] are in separate site locations, and that user end [in red font] switches only have ip base, which limits eigrp functionality.)

We tried following this, but doesn't fit our site exactly:

http://www.geekmungus.co.uk/cisco-and-networking/failoverinternetconnectionusingipslatrackingandeigrproutingforinter-sitelinks

(Also ran into issue where switch in the middle would have two routes to internet - so possible issue with priority routes)

Thanks in advance

[support systemsGo]

A question for you:

We have some virtual servers on the same Vlan10 that will be cloned from Site_1 to Site_2.

If those servers are booted up in Site_2, their configuration will still be pointing to Site_1 switch stack as the gateway.

If Site_1 is completely down (switch stack and ISP1), will clients in Site_3 still be able to access them?

And would those servers still be able to access the internet via Site_2/ISP2?

If no, is there anything we can do to make that possible?

Thanks