Indicates whether the Endpoint Discriminator Option is enabled. The Endpoint Discriminator Option represents identification of the system transmitting the packet. This option advises a system that the peer on this link could be the same as the peer on another existing link. If the option distinguishes this peer from all others, a new bundle MUST be established from the link being negotiated. If this option matches the class and address of some other peer of an existing link, the new link MUST be joined to the bundle containing the link to the matching peer or MUST establish a new bundle. For more information about the Endpoint Discriminator Option - see RFC-1990 (The PPP Multilink Protocol).