Cisco WAN :: 3750G - Dynamic Routing Between Private Networks

how to redistribute routes between three independently managed private networks.

Currently: See attachment The two buildings managed by Company 1 are connected by 4x1GB fibre channel ports on Cisco 3750G Standard Image switches. Static routing is used between the two building and static routes are used to direct traffic to Company 2 and Company 3 via routers managed by their respective companies. No NAT is required as all three companies use separate private address schemes.

Network Improvements: See attachment To increase network resilience Companies 2 and Company 3 are planning on installing new routers in building 2. Companies 2 and 3 use Dynamic routing protocols on their internal network.  Incoming and outgoing resilience is required in all three companies.  There is no direct connectivity between Company 2 and 3.

I would like the following questions answered:

1. Is dynamic routing needed in Company 1?

2. Given that only 4 devices are managed by Company 1 will RIPv2 work? NB. Company 2 and 3 have very large networks (3000+ sites).

3. Would route redistribution be best performed on Company 2 and 3’s CE routers?

4. How can route redistribution be controlled by Company 1?