When there is no route to host for SSH, re-establish a new connection

CHANGELOG.md

@@ -4,6 +4,7 @@ BUG FIXES:
 
   - Quote keys to StringBlockEditor so keys with spaces, parens, and
     so on work properly.
+  - When there is no route to host for SSH, re-establish a new connection.
 
 ## 1.1.0 (March 14, 2013)
 

plugins/communicators/ssh/communicator.rb

@@ -126,6 +126,9 @@ module VagrantPlugins
           # socket.
           begin
             @connection.exec!("")
+          rescue Errno::EHOSTUNREACH
+            @logger.info("No route to host for connection. Not re-using.")
+            @connection = nil
           rescue IOError
             @logger.info("Connection has been closed. Not re-using.")
             @connection = nil