PS: In our enterprise, we never have stacking w/c involves the switch located on another room. Most of the switches are on one IDF. For example, enterprise level switches e.g., 3850 switches. They never are in another room that is almost, as you said 450meters away from each other. What's the difference you may ask? Well, for your SG500(assume you are using copper), the stack speed is 1Gbps/stack hence total of 2Gbps stack speed. The 3850 can reach 480Gbps stack speed.
If you want Layer 2 redundancy on w/c you desire that the devices are in separate rooms, above 100m, you need L2 redundancy supported device w/c can only be found on Nexus switches through their VPC feature. Of course, this is on the enterprise level, but your goal on having them separated 450m away is achievable through this. Besides that, because of portchannel feature, you can group the peer-link ports. If you have 10Gbps of ports, hence you get a total of 80Gbps of speed on the peer link
Introduction:Topology Diagram:Configuration Overview:Related
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