release-20.2:Backport!3855

Merged Andrey Vertiprahov requested to merge cherry-pick-e15610f1 into release-20.2

Fix invalid vlan number in Generic.get_mac_address_table script

See merge request !3855 (merged)

(cherry picked from commit e15610f1)

453165a5 Fix invalid vlan number in Generic.get_mac_address_table script 25299edb Fix 4a945f65 Add comments

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