Does the server room already have some cabling in it? If so there be a transceiver that will match the preexisting cables. There are also some direct attach cables ranging from 0.5m to 50m. Here is an example of a direct attach cable: [URL] the best course of action would be to contact your sales rep and let them know what your needs are. They can get you quoted for the right connection hardware. both VLT and stacking both have the same goal of redundancy, but go about it in different methods with different caveats for both. In both scenarios the redundancy is reliant on each connecting device connecting to both switches. If you do not plan on doing this, then it may be best to leave the switches independent. Here is a good blog that compares VLT and stacking.  [URL] Hope this helps.  
 Hi everyone, We have just bought two Force10 S4810P network switches and we want to install them on two adjacent racks. They will be used to interconnect compute and NAS storage installed across both racks so mainly serving local connections. We are planning to use the QSFP+ ports to connect both switches and I have two questions. 1. Hardware configuration: what are the best transceivers and cables to use in this case? 2. Software configuration: should we use stacking or virtual link trunking? the information I have been reading so far does not give me a definite answer. Many thanks in advance for your help! 
How to connect two Force10 S4810P network switches