I am looking into making our (rather small) network more resiliant.
The attached files show the current network (CN.jpg) and the proposed network (PN.jpg). In the current network, the core switch is a CE500-12TC and the access switches are 3Com 4400-SEs with two CE500-24TTs.
I plan to implement 4 VLANs, for servers, printers, staff, and network management, so would want the distribution switches to be layer 3.
Firstly I am after any positive/negative comments about this design.
Secondly, what model of switch would you use for the core/distribution?
The access switches are being standardised as CE500-24TTs, except for the ones needing fiber connections with will be the 24-PC model.
I think that you network is too small to have 3 layers. You can consider a collapsed design where a single layer will function as core and distribution.
I would recommend a L3 switch in the collapsed core such as Catalyst 3650 or Catalyst 3750 ... A 4500 or 6500 will be very expensive for your implementation.
So 2 x 3650/3750 with standard multilayer image (you dont the enhanced image) and please get rid of the crap 3Com switches :-) ... an Express500 would be a good access switch for you or you can use the Catalyst 2960 instead.
Connect each of your access switches with two gig trunks to both core switches and interconnect both core switches with a multiple-gig ports and use EtherChannel. Configure HSRP on your core switches and you should have a nice running network after that.
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