I'm having 4 no.s 3750 as Distribution switching connecting as per standard Cisco Layer Architechture to Core1 & Core2, HSRP is running over there. Both Core Switch are 4506. Now we want a DR site for my DC outside ( within 10KM), and it will simply extending my LAN through Ethernet Over Fiber Channel. I want othe FO connectivity from all Distribution switch to a 3rd Core ( Core_3) switch 4506.
Please let me know if it is possible to have 3 switch pointing towards single gateway ( standby ) IP, as normal we do the with 2nos. Core switch. I'm not sure it can be done with 3no.s of switch also.
If Core_1 & Core_2 both will go down then Core_3 will come in the picture...is it also require any link to be conneced from Core_1 & Core_2 to Core_3 ?