Best Strategy for Adding a New Network (LAN) to Existing Network?

[David Rodriguez]

Hello Everyone,

I was looking to get some advice and tactics to adding a new LAN to an exsting network. Currently our subnet is 192.168.100.0/22 and includes several VLANs (i.e. VoIP, etc) spread over a campus consisting of 3 buildings that are connected via fiber. I have been tasked with adding a new network (192.168.150.0/24) that will need to be spread (accessible via configured ports on switches for new VLAN 150) across the entire campus.  The network must be isolated from other networks, because the new network will be used by outside vendors to update firmware on equipment we have purchased from them and we do not want vendors to have access to any other portion of the network.  Hope that makes sense.   Any advice would be greatly appreciated.

[Gregory Snipes]

What kind of equipment are you currently using? Where is your routing taking place? Would it be possible to see a diagram of the network?

[David Rodriguez]

Gregory,

Thanks for your response! 

• Currently all cisco equipment mainly WS-C3750X-48P-S, WS-C3750G-48P-S,WS-C2950, 2851 ISR, ASA5510.
  

• Routing is taking place on 2851 locted in each building (pretty sure, fairly new to environment - only 7 wks).
  
• I will try to provide a diagram, but I have remove company info first.
  

[Gregory Snipes]

1) Your equipment all seams pretty current witch bodes well for maximum flexibility here.

2) Routing in each building when you have a large shared subnet in all of them would be a bit odd, please confirm this. If you do not have layer 2 connectivity between the buildings using a single subnet in all of them would get complicated.

3) More people should be so cautious, and by more I mean all. Please do provide it whenever you have a chance.

[David Rodriguez]

Gregory,

Sorry for the delayed response. I have implemented a solution and is working well.  Just wanted to thank you for you time and responses.

Regards,

David