old_contents: from fabric.api import env
  
  os_username = 'admin'
  os_password = 'contrail123'
  os_tenant_name = 'demo'
  
  host1 = 'root@10.84.13.30'
  
  ext_routers = []
  router_asn = 64512
  public_vn_rtgt = 10000
  
  host_build = 'nsheth@10.84.5.31'
  
  env.roledefs = {
      'all':       [host1],
      'cfgm':      [host1],
      'openstack': [host1],
      'webui':     [host1],
      'control':   [host1],
      'collector': [host1],
      'database':  [host1],
      'compute':   [host1],
      'build': [host_build],
  }
  
  env.hostnames = {
      'all': ['a6s30']
  }
  
  env.ostypes = {
      host1:'ubuntu',
  }
  
  env.passwords = {
      host1: 'c0ntrail123',
      host_build: 'c0ntrail123',
  }
  
new_contents: from fabric.api import env
  
  os_username = 'admin'
  os_password = 'contrail123'
  os_tenant_name = 'demo'
  
  host1 = 'root@10.84.13.30'
  
  ext_routers = [('mx1', '10.84.11.253'), ('mx2', '10.84.11.252')]
  router_asn = 64512
  public_vn_rtgt = 10000
  
  host_build = 'nsheth@10.84.5.31'
  
  env.roledefs = {
      'all':       [host1],
      'cfgm':      [host1],
      'openstack': [host1],
      'webui':     [host1],
      'control':   [host1],
      'collector': [host1],
      'database':  [host1],
      'compute':   [host1],
      'build': [host_build],
  }
  
  env.hostnames = {
      'all': ['a6s30']
  }
  
  env.ostypes = {
      host1:'ubuntu',
  }
  
  env.passwords = {
      host1: 'c0ntrail123',
      host_build: 'c0ntrail123',
  }
  
subject: Add MXs.