Hi Qamrul

LLDs are part of your IP, so most will not share. Cisco has some good templates for partners, especially for VoIP deployments.

If you are doing your own include some of the following topics with specific relevance to your design

- Technology

     i.e. OSPF works like this and that is why it was chosen for the core IGP. The following enhancements will be deployed and a typical core router wil have the following ospf config applied
- Hardware used

- Network topology (Physical and Logical)

- Deployment/Implementation plan

Cheers