tree d058943454d23689936d8306bcd6c8b0573309aa
parent 63a0ac99fedb017a6450c4484620ac29b0462dee
author Saurav Das <sauravdas@alumni.stanford.edu> 1516306053 -0800
committer Charles Chan <rascov@gmail.com> 1516322306 -0800

Take down edge ports on a leaf switch when all uplinks are gone

- Bug fix for case when all uplinks are gone, but dual-homed host continues to send packets to switch;
  We now administratively take down the host port to force the host to use the other leaf in the pair.
- Restructured SR manager by creating a LinkHandler
- fixed/added some log messages

Change-Id: I3722cd364dc8798b16891519bec165627e92bd87