Hello Dipesh,
I've opened the documents you have attached to your last post.
Before answering to your questions let me write some notes:
1) I see you have a single management vlan 1 that spans on all the site.
You could consider two possible changes:
to use a per switch block management vlan to avoid to have a single vlan that spans in all campus
and to avoid to use vlan1 that is not recommended for security reasons in L2 security best practices.
2) your picture shows two distribution switches per switch block: my understanding was you have only one distribution for switch block and you provide part of configuration of only one.
Again if distribution switches were two this redundancy should be managed by using HSRP also on the client vlans.
In the following I suppose you have only one distribution node per switch block
Answers follow:
Q1) STP and VTP
if all devices are in VTP mode transparent mode you need to manually create vlans in all devices.
Example
! create L2 vlan vlan2
conf t
vlan 2
name backbone
about STP: you should enforce STP root bridge election not only on cores but also on each distribution
switch block1
spanning-tree vlan 3,4 priority 16384
switch block2
spanning-tree vlan 5,6 priority 16384
and so on. Each distrib should be root for client vlans of its block.
Q2) HSRP
your configuration could be tuned with some tracking action, but note that HSRP would be not used if OSPF is deployed.
As noted above if there are two distrib nodes per block HSRP should be deployed for each client Vlan of the block.
Q3) OSPF
here I suppose you still have vlan1 that spans in the whole campus, if you implement per block management vlan minor changes are needed.
core
router ospf 10
network 10.0.2.0 0.0.0.255 area 0
network 10.0.1.0 0.0.0.255 area 101
! to propagate knowledge of static routes of other non OSPF speaking sites:
redistribute static subnets
!
Edit:
this was a point I had left unclear core switches can inject in OSPF routes equivalent to static routes to distribution devices
to access the internet a default route is needed, also this has to be addressed
default-information originate
! end of ospf config on core devices
Note:
on core you can remove only static routes pointing to OSPF speaking devices
distrib block1
router ospf 10
network 10.0.2.0 0.0.0.255 area 0
network 10.0.3.0 0.0.0.255 area 101
network 10.0.4.0 0.0.0.255 area 101
(same config in second distrib node if any)
distrib block2
router ospf 10
network 10.0.2.0 0.0.0.255 area 0
network 10.0.5.0 0.0.0.255 area 101
network 10.0.6.0 0.0.0.255 area 101
Hope to help
Giuseppe
