s << "gbp-contract-create: " << m_hw_item.to_string()
<< " src-epg-id:" << m_src_epg_id << " dst-epg-id:" << m_dst_epg_id
<< " acl:" << m_acl;
+ s << "[ethertype:";
+ for (auto e : m_allowed_ethertypes)
+ s << " " << e;
+ s << "]";
return (s.str());
}