code: def cli(env, context_id, friendly_name, remote_peer, preshared_key,
          phase1_auth, phase1_crypto, phase1_dh, phase1_key_ttl, phase2_auth,
          phase2_crypto, phase2_dh, phase2_forward_secrecy, phase2_key_ttl):
      
      manager = SoftLayer.IPSECManager(env.client)
      succeeded = manager.update_tunnel_context(
          context_id,
          friendly_name=friendly_name,
          remote_peer=remote_peer,
          preshared_key=preshared_key,
          phase1_auth=phase1_auth,
          phase1_crypto=phase1_crypto,
          phase1_dh=phase1_dh,
          phase1_key_ttl=phase1_key_ttl,
          phase2_auth=phase2_auth,
          phase2_crypto=phase2_crypto,
          phase2_dh=phase2_dh,
          phase2_forward_secrecy=phase2_forward_secrecy,
          phase2_key_ttl=phase2_key_ttl
      )
      if succeeded:
          env.out('Updated context #{}'.format(context_id))
      else:
          raise CLIHalt('Failed to update context #{}'.format(context_id))
docs: Update tunnel context properties.
  
      Updates are made atomically, so either all are accepted or none are.
  
      Key life values must be in the range 120-172800.
  
      Phase 2 perfect forward secrecy must be in the range 0-1.
  
      A separate configuration request should be made to realize changes on
      network devices.