Hi Guys, I'm looking for some advice on redesigning our campus network.
We have around 2500 devices on our site which are spread across multiple buildings. At present the network runs on a (legacy) single flat VLAN which has caused us more than our fair share of headaches of late. Basically we are looking at 2 design options : The first option we have considered is to have a "router on a stick" at our core and trunk VLANS out to distribution switches in each building (and on to workgroup switches etc), leaving all routing to be done at the core. This would allow us to have all VLANS available in each building but I'm not sure if this is still going to be a problematic design (with VLANS extended all over the site). The other option we have been looking at (see attached) is to have L3 switches as all our distribution switches and contain VLANS to a particular building. This seems to be a neater solution to me, but I'm not sure of the best way to connect the distribution switches back to the core. I would also like to connect adjacent distribution switches together for redundancy, so I'm wondering if I should be looking at a heap of /30 links between distribution switches & the core (and run OSPF) - or just use a L2 network and let STP manage the links. I havent had much playtime on networks this size so any advice would be greatly appreciated. M.
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