traffic-graphs, don't stop drawing graphs when a interface is disabled
(cherry picked from commit 176c7256bd1b13f401c554faae4a6ed55950682a)
traffic-graphs, don't stop drawing graphs when a interface is disabled
traffic-graphs, don't stop drawing graphs when a interface is disabled
(cherry picked from commit 176c7256bd1b13f401c554faae4a6ed55950682a)