pantheon.aliases.drushrc.php

$aliases['sitename.dev'] = array(
  'uri' => '${env-name}-sitename.pantheonsite.io',
  'remote-host' => 'appserver.${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa.drush.in',
  'remote-user' => '${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa',
  'ssh-options' => '-p 2222 -o "AddressFamily inet"',
  'path-aliases' => array(
    '%files' => 'files',
   ),
);
$aliases['sitename.test'] = array(
  'uri' => '${env-name}-sitename.pantheonsite.io',
  'remote-host' => 'appserver.${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa.drush.in',
  'remote-user' => '${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa',
  'ssh-options' => '-p 2222 -o "AddressFamily inet"',
  'path-aliases' => array(
    '%files' => 'files',
   ),
);
$aliases['sitename.live'] = array(
  'uri' => '${env-name}-sitename.pantheonsite.io',
  'remote-host' => 'appserver.${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa.drush.in',
  'remote-user' => '${env-name}.aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa',
  'ssh-options' => '-p 2222 -o "AddressFamily inet"',
  'path-aliases' => array(
    '%files' => 'files',
   ),
);