ref: c7bffb66735df8ea01e268bc906695ee04f007ae
parent: 736128e4e372bc026019b6a1169619ca6cc97a7b
parent: 8652028620269cb9f3415cc405c67e5af1492621
author: huili2 <huili2@cisco.com>
date: Tue Dec 20 04:27:13 EST 2016
Merge pull request #2623 from ruil2/lrt1
modify LTR interface and support LTR request for each layer