[cisco-voip] Network Change Recommendations

[Voll, Scott]

1.  if your router is "Max out" why not route the vlan's at a layer 3 switch.  your going to have better through put anyway.  If your simply routing vlan's this can be done at wire speed in hardware with a switch.  let a router interface your PSTN and bigger routing protocols ie. BGP
 
2.  Seperating out into more vlan's gives you more options to secure and protect.  Good Idea.
 
3.  Less host per subnet equals less arp and better performance.
 
They are telling you right.
 
So tell management your doing it for Better performance, Security, and reliablity.  That makes my management buy off ;-)
 
Scott

________________________________

From: cisco-voip-bounces at puck.nether.net on behalf of TechGuy
Sent: Wed 11/23/2005 4:04 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Network Change Recommendations


We have some engineers in helping with a new callmanager and IPCC implementation at a secondary company of ours.
 
They have made some recommendations on some network changes and I wanted to ask others about the changes and what you think would be the pro's and con's of doing so and why do you think they are suggesting these changes. 
 
1.  Move the inter-VLAN routing to the switches.  (This office has a maxed out 3845 acting as the core router and voice gateway, it currently does all routing)
 
2.  Seperate VLANs for servers, pc's, callmanagers, phones  (Currently we have one vlan for servers and pc's, and one VLAN for callmanagers and phones)
 
3.  Remove class B addressing and utilize Class C addressing (The internal network was originally configured with Class B addressing throughout)
 
Thats the bigger changes that I really just want to understand the various pro's for why they would recommend them.  They make sense and I don't question that these are not best practices but I want to really understand why the changes to sell it to management.  Their philosophy is "if its not broke dont fix it" and feel that the network has been working fine so why all the changes. 
 
Thanks for your time!
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