I have multi-layer architecture of Access, Distribution, and Core Layer switches making up the HQ site; I am running EIGRP routing protocol in this network, I also have a 4500 switch connected to the distribution layer which is connecting the WAN module to the HQ site. The 4500 switch is running both EIGRP process which is used in the HQ site and is also the border of an OSPF process used in the remote sites. I am redistributing EIGRP into OSPF and static routes into EIGRP.
I would like to check on the following:
1. Do I also need to redistribute OSPF into EIGRP as I am redistributing EIGRP into OSPF?
2. Do I need to configure any default static routes on any of the switches layers or will the dynamic routing take care of the default route as it is taking care of the specific routes?
3. In the Access layer switch I know I will need to configure the ?IP helper-address? to relay DHCP broadcasts from the users to the DHCP server which is connected to the core switch; do I also need to configure the same on the Distribution and Core switches? If so, I am having L3 connectivity between the Access and the Distribution switches so on which interfaces on the distribution and core switches I should configure this command?
4. Does the L3 link I have between the Access and the Distribution layer pass VTP and STP L2 protocols information?