Description: The identifier, usually in the form of a Domain Name (full or partial), describing a single tunnel endpoint or a domain of tunnel endpoints. This is typically used as a 'handle' to identify the tunnel configuration requirements for both incoming and outgoing tunnel connection attempts. Both the LAC and LNS could use information provided in the Host Name AVP attribute however the tunnel initiator could use other means not specified to identify the domain's tunnel configuration requirements. For example; three rows in this table have l2tpDomainConfigId values of 'lac1.isp.com', 'isp.com' and 'com'. A tunnel endpoint then identifies itself as 'lac1.isp.com' which would match the 'lac1.isp.com' entry in this table. A second tunnel endpoint then identifies itself as 'lac2.isp.com'. This endpoint is then associated with the 'isp.com' entry of this table.