The current value of the Endpoint Discriminator which
identifies this Multilink PPP bundle on the remote
peer. When the local peer desires to add a new link
to this Multilink PPP bundle, it will include this
value during link establishment of the new link. This
value will indicate to the remote peer that the new
link is intended to join this existing Multilink PPP
bundle.
The first byte in the string identifies the Class of
the Endpoint Discriminator. The remaining bytes in
the string contain the actual Endpoint Discriminator
value.