The current value of the Endpoint Discriminator
which identifies this Multilink PPP bundle on the
local peer. When the remote 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
local 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.