Host 1.2.3.4 someswitch1
   User carl
   IdentityFile ~/.ssh/mysshkey
   IdentitiesOnly yes
   Hostname someswitch1.bogus.com
   Port 1234

Host someswitch?
   User notcarl
   IdentityFile ~/.ssh/mysshkey
   IdentitiesOnly yes
   Hostname someswitch1.bogus.com
   Port 1234

Host scrapli
   User scrapli

Host *
   User somebodyelse
   IdentityFile ~/.ssh/lastresortkey
