code: def __get_vpc_info(self, ifarr):
          '''
          If VPC is enabled,
          Return the VPC domain and interface name of the VPC peerlink.
          '''
          if (self.vpc_vbtbl == None):
              self.vpc_vbtbl = self.snmpobj.get_bulk(OID_VPC_PEERLINK_IF)
          if ((self.vpc_vbtbl == None) | (len(self.vpc_vbtbl) == 0)):
              return (None, None)
          domain = natlas_snmp.get_last_oid_token(self.vpc_vbtbl[0][0][0])
          ifidx  = str(self.vpc_vbtbl[0][0][1])
          ifname = self.snmpobj.cache_lookup(ifarr, OID_ETH_IF_DESC + '.' + ifidx)
          ifname = self.shorten_port_name(ifname)
          return (domain, ifnamef __get_vpc_info(self, ifarr):
          '''
          If VPC is enabled,
          Return the VPC domain and interface name of the VPC peerlink.
          '''
          if (self.vpc_vbtbl == None):
              self.vpc_vbtbl = self.snmpobj.get_bulk(OID_VPC_PEERLINK_IF)
          if ((self.vpc_vbtbl == None) | (len(self.vpc_vbtbl) == 0)):
              return (None, None)
          domain = natlas_snmp.get_last_oid_token(self.vpc_vbtbl[0][0][0])
          ifidx  = str(self.vpc_vbtbl[0][0][1])
          ifname = self.snmpobj.cache_lookup(ifarr, OID_ETH_IF_DESC + '.' + ifidx)
          ifname = self.shorten_port_name(ifname)
          return (domain, ifname)
docs: If VPC is enabled,
          Return the VPC domain and interface name of the VPC peerlink.