[mpls-linux-general] Q on DoD and DU interoperation in Linux?

[HariKishan <har...@er...>]

In RFC 3036 ( LDP specification) Section 3.5.3 
states that if two LSRs, one supporting DU and
the other supporting DoD try to establish a LDP
session over a NON-ATM link, they should back off
to DU. If this is not acceptable to any of the
LSRs it should send a notification message and
should not establish the session.

Where as in Section 3.5.7.1.3 states a rule, 
which, if followed, can let the above two LSRs
interoperate with each other.

What does the Linux implementation do in such
a situation? 

Thanks,
Kishan