Check this out:https://snmp.cloudapps.cisco.com/Support/SNMP/do/BrowseOID.do?objectInput=rttMonJitterStatsTable&translate=Translate&submitValue=SUBMIT&submitClicked=true
if ports desired to be blocked belong to specific vlan(s), you can use vlan access-map :https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-0SY/configuration/guide/15_0_sy_swcg/vlan_acls.html#pgfId-1055968
