MCAST-FILTER-MIB

Description: D-Link multicast filter MIB defining SNMP objects for configuring IP multicast group filtering on D-Link switch ports.

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MCAST-FILTER-MIB ("Multicast Filter Common MIB") is a D-Link Corp. proprietary MIB, reused across multiple D-Link switch product lines (DES-3810, DGS-3700, DES-3528R2, and others), that models IP multicast group filtering configuration on switch ports and VLANs. Its core object, swMcastFilterProfileInfoTable, defines named multicast filter profiles (identified by an index and description) whose row lifecycle is managed via RowStatus, and companion tables (documented in the module's revision history) extend this to per-port and per-VLAN group membership, per-port/per-VLAN access control, maximum-group limits with configurable overflow actions, and parallel IPv6 variants of each of these tables. This lets an operator restrict which multicast groups a given port or VLAN is permitted to join and cap the number of simultaneous multicast groups a port can subscribe to, which is useful for preventing multicast flooding or unauthorized IPTV/streaming access on access-layer ports. It depends on DLINK-ID-REC-MIB for its enterprise OID placement and defines its own Ipv6Address textual convention for IPv6 filter variants. It is deployed on D-Link managed switches supporting IGMP/MLD snooping with filtering; administrators can download the MCAST-FILTER-MIB file to load it into their MIB browser for SNMP monitoring of these filter settings.

An operator polls swMcastFilterProfileInfoTable and the associated per-port group table to confirm a port is restricted to an approved multicast profile, then checks the corresponding max-group table's action setting; a port whose current group count reaches its configured maximum with the action set to deny would explain why a client on that port failed to join an additional multicast stream.

SNMP MIB for managing multicast filtering on bridge and network devices, extending standard bridge definitions with multicast traffic control objects as defined in RFC 4363.