When pulling Bridge Table Information on a Cisco Devices using SNMPv3, one must enable the SNMPv3 group to access to the VLAN contexts. This used to have to be done per VLAN, but with newer IOS versions it can be done with one command:
snmp-server group <SNMP Security Group> v3 auth context vlan- match prefix
The above will assign the group <SNMP Security Group> to permit using contexts with the prefix “vlan-“ on it.
To Verify the SNMPv3 Info in the Configuration:
Switch>enable
Switch#show running-config | include snmp-server
snmp-server group <SNMP Security Group> v3 priv read PSv3view write PSv3view
snmp-server group <SNMP Security Group> v3 auth context vlan- match prefix
snmp-server view PSv3view internet included
snmp-server community public RO
Switch#