docs: def get_event_tags_from_dn(dn):
      """
      This grabs the event tags from the dn designator. They look like this:
      uni/tn-DataDog/ap-DtDg-AP1-EcommerceApp/epg-DtDg-Ecomm/HDl2IngrPktsAg1h
      """
      tags = []
      node = get_node_from_dn(dn)
      if node:
          tags.append("node:" + node)
      app = get_app_from_dn(dn)
      if app:
          tags.append("app:" + app)
      bd = get_bd_from_dn(dn)
      if bd:
          tags.append("bd:" + bd)
      cep = get_cep_from_dn(dn)
      if cep:
          tags.append("mac:" + cep)
      ip = get_ip_from_dn(dn)
      if ip:
          tags.append("ip:" + ip)
      epg = get_epg_from_dn(dn)
      if epg:
          tags.append("epg:" + epg)
      return tags