I have four Cisco 1800 series routers and a 3750 switch. All the four routers are connected to the 3750 switch.
The first router is used for Mail traffic
The second for Citrix traffic
the third for general web browsing
The fourth router is a backup link.
I have configured HSRP on the routers and policy routing on the cisco switch.
The internet connection of router R1 went down this morning and the bacup failed to kick in.
The attached file contain the Configuration of the routers and a switch.
I would be very grateful if somebody could checked the config and help me troubleshooting this problem.
I imagine that the mail clients sit behind the 3750, which will then forward the traffic to the correct next hop.
Therefore, the problem is with the static route on the 3750 switch for the mail service.
ip route 195.x.x.Z 255.255.255.255 126.96.36.199 (MAIL Server)
The static route should be pointing to the HSRP VIP for group 2, which is 188.8.131.52, not the vlan interface for R1. Otherwise, you are always going to be forwarding traffic to one physical router, instead of the virtual gateway address, which each standby physical router can take ownership of when it becomes necessary, such as when the HSRP primary router fails or, as in your case, its serial link fails.