Hoping to get some advice on network design and best practice... We inherited a small and simple flat network that has steadily increased in terms of PC's (400) on the network and sites (8).
It consists of a single class B network with subnet mask 255.255.252.0 with a VLAN for data and a VLAN for voice.
The main site has a single Catalyst 4500 switch connected via gigabit fiber to the 8 smaller sites. The smaller sites mostly consist of either a single 24 or 48 port switch (Catalyst 3550 or 2950).
My question is, in terms of best practice and performance should we be implementing additional VLAN's or subnets? e.g at the smaller sites? Also, if we were wanting to implement redundancy in our switches, what should we be doing in terms of design?
Any advice you can give would be most appreciated.