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How to Design STP Loop Free Network

Considering the impact that STP Loop can cause in the Network, I would like to know in real world whether there is granularity in configuration to fend off the loop or just set up VLANs normal way, use the VLAN Interfaces to communicate between VLANs and ignore the granular configuration.

What I mean by granular, to cite just few examples:
- Manually configure for each VLAN a specific Switch to be the Root for that VLAN
- Manually configure Access ports to be Portfast and at the same time configure the Ports with BPDUGUARD
- Manually configure on each VLAN each Blocked port with Loop Guard and UDLD
-Manually configure each VLAN with Root Guad,
Etc....
Etc...

if that's the case there should be a Config Template, that encompasses all those concerns.

Any clarifications on that ?

Thank you

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Predrag Jovic

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jskfan

ASKER

The Example of Network I will use is a Company that has a Data Center in Site A (the main Site) and has Branches in site B ,C,D,E,F . Each Branch has around 300 computer Users.
Sites are connected with WAN Connection.

All the Servers are in Site A, which means client requests will have to come to Site A to retrieve and Update the Information.

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Predrag Jovic

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jskfan

ASKER

Assuming Everything is set up properly..and we are running RPVST.
what do you do next to prevent STP loops ?
Do you have a Configuration Example that you can use on every single VLAN ?

jskfan

ASKER

Each Site is connected to the DataCenter (Core) as shown below:

jskfan

ASKER

What Configuration Template will you apply on Access /Distribution/Core Switches in order to avoid STP Loops ?

jskfan

ASKER

I will do some reading later