Switch topology design question

[TC27]

Hello,

I have a small office we are converting to Meraki switching - basically a brownfield deployment.

I will have 3 logical switches (one stack of two 250s and two standalone 225s).

There are about 60 users in the office. Traffic flow in the office is mostly North/South (very little compute actually in the office.)

Should I therefore create a switch topology whereby each logical switch connects directly to the MX100 router via Ethernet trunks? This to me would offer the best design for north south traffic. The downside is this creates an sub optimal layer 2 topology for broadcast/local traffic and wont allow me to use the SFP connections.

[alemabrahao]

Yes, you can do that.

[alemabrahao]

Just remember that MX does not support LACP so if you intend to connect an interface of each switch in the stack, you must enable STP to avoid network looping.

[TC27]

Hello - yes that makes sense. I guess I need to consider the root bridge location carefully (probably the stack).

[cmr]

I'd connect the MXes to the 250 stack and then the 225s to the 250s.  Use port channels (aggregate ports) to connect the 250s and 225s.  That way you have redundant connections without the risk of spanning tree loops.

Unless your MXs and internet connection are over 20Gbps, you will get the best of both with this design.

[PhilipDAth]

^ do this