release-20.1:Backport!3454

Merged Andrey Vertiprahov requested to merge cherry-pick-a74784fe into release-20.1

Qtech.QSW.get_chassis_id. Add render_mac to SNMP method.

See merge request !3454 (merged)

(cherry picked from commit a74784fe)

bbdcc952 Qtech.QSW.get_chassis_id. Add render_mac to SNMP method.

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