i'm not sure that I understand your situation correctly. The only thing I can say, is that it is hard requirement there are enough Switch ports if you install VxRail. If it's with 4 * 10GbE option, TOR switch must have at least 4 ports available for each node. if it's with 2 * 10GbE option, TOR switch must have at least 2 ports available for each node. So, If there are only 10 ports available on TOR, you cannot configure 3-node VxRail with 4 * 10 GbE option because that require 12 ports available in total. Whereas, you can deploy VxRail with 2 * 10GbE (remaining 2 ports are free for future use) because it only requires 6 ports in total for installation..   TOR Switch can be replaced after VxRail deployment unless it is using Smart Fabric.
HI Vxrail folks We plan to install a Vxrail 3 nodes cluster with 04 10 Gbe SFP+ ports each , the 02 TORS switches are not   yet  purchased and will take some time to be on site , in the mane time  I have one switch  that meet the requirements and  want to  configure  it as a temporary TOR  and replace it by the 02  official TORs when they will be  ready , of course with a down time  , My first  question is their any risk  when replacing the  temporary switche later supposing that the configuration  of vlan ports , STP, interlink , uplink  etc on the official switches will   be donne properly  with nochange?  My second question , I  dont have suffisant ports to connect all the  03 nodes ports  to the temporary TOR  (have only 10 SFP+  instead of the 12 needed with a 04 port deployment ,  can I deploy the cluster with 02 missing uplinks  ?   Hope that someone can help me on this scenario   Have a good day  Regads    
Deploying a Vxrail cluster with a temporary TOR switch