I got a complex issue with link redundancy in my core network. As shown in diagram, I have four 6513 (A,B,C,D) switch with CatOs and MSFC IOS in hybrid mode and two 6509 switch. Switch E has MSFC but Switch F doesn't have it. There are more than two hundred vlans and each 6500 switch are working as VTP servers with more than 70 4000 and 4500 series switch.
Switch A,B,C,D, E are configured to intervlan routing with EIGRP routing protocols. Switch A and B are HSRP pair for 30 vlan and switch C and D are working as HSRP pair for rest of 100 vlans, and switch E have inter-vlan routing for 50 and more vlans with out hsrp configuration.
Switch A, B, c, D, E are in RAPID PVST + mode and switch F and rest of the access layer switch are in PVST + mode of Spanning Tree.
My concern is the effect of connecting all the redundant link as shown in proposed diagram.
Does STP will come on the way of EIGRP shortest path possibly blocking a port on the way ?
I just wanted to know issues that come along with my proposed connectionbefore going live.
MOST IMPORTANT : I MUST HAVE NO DOWN TIME.
PLEASE HELP ! ! !