This MIB describes objects used for managing IP multicast function,
including IP multicast routing. These objects are independent of the
specific multicast routing protocol in use. Managed objects specific
to particular multicast protocols are defined elsewhere.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
This document obsoletes [RFC2932]. The MIB module defined by this
document is a re-working of the MIB module from [RFC2932], with
changes that include the following:
o This MIB module includes support for IPv6 addressing and the IPv6
scoped address architecture. [RFC2932] supported only IPv4.
o This MIB module allows several multicast protocols to perform
routing on a single interface, where [RFC2932] assumed each
interface supported at most one multicast routing protocol.
Multicast routing protocols are now per-route, see
o This MIB module includes objects that are not specific to
multicast routing. It allows management of multicast function on
systems that do not perform routing, whereas [RFC2932] was
restricted to multicast routing.
o This MIB module includes a table of Source-Specific Multicast
(SSM) address ranges to which SSM semantics [RFC3569] should be
o This MIB module includes a table of local applications that are
receiving multicast data.
o This MIB module includes a table of multicast scope zones.
3. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
([RFC2578], [RFC2579] and [RFC2580]).
This MIB module contains two scalars and eight tables. The tables
1. The IP Multicast Interface Table, which contains multicast
information specific to interfaces.
2. The IP Multicast SSM Range Table, which contains one row per
range of multicast group addresses to which Source-Specific
Multicast semantics [RFC3569] should be applied.
3. The IP Multicast Route Table, which contains multicast routing
information for IP datagrams sent by particular sources to the IP
multicast groups known to a system.
4. The IP Multicast Routing Next Hop Table, which contains
information about next-hops for the routing of IP multicast
datagrams. Each entry is one of a list of next-hops on outgoing
interfaces for particular sources sending to a particular
multicast group address.
5. The IP Multicast Scope Boundary Table, which contains the
boundaries configured for multicast scopes [RFC2365].
6. The IP Multicast Scope Name Table, which contains human-readable
names for multicast scopes.
7. The IP Multicast Local Listener Table, which contains identifiers
for local applications that are receiving multicast data.
8. The IP Multicast Zone Table, which contains an entry for each
scope zone known to a system, and maps each zone to the multicast
address range that is the corresponding scope.
This MIB module uses textual conventions defined in the IF-MIB
[RFC2863], the INET-ADDRESS-MIB [RFC4001] and the IANA-RTPROTO-MIB.
5. IMPORTed MIB Modules and REFERENCE Clauses
The MIB modules defined in this document IMPORTs definitions
normatively from the following MIB modules, beyond [RFC2578],
[RFC2579], and [RFC2580]: HCNUM-TC [RFC2856], IF-MIB [RFC2863], IANA-
RTPROTO-MIB, SNMP-FRAMEWORK-MIB [RFC3411], INET-ADDRESS-MIB
[RFC4001], and LANGTAG-TC-MIB [RFC5131].
This MIB module also includes REFERENCE clauses that make normative
references to Administratively Scoped IP Multicast [RFC2365],
Unicast-Prefix-based IPv6 Multicast Addresses [RFC3306], IPv6 Scoped
Address Architecture [RFC4007], and IPv6 Addressing Architecture
Finally, this MIB module makes informative references to several RFCs
in the text of DESCRIPTION clauses, including sysApplMIB [RFC2287],
IP-MIB [RFC4293], Source-Specific Multicast [RFC3569], Protocol
Independent Multicast-Sparse Mode version 2 (PIM-SMv2) Protocol
Specification [RFC4601], Bidirectional Protocol Independent Multicast
(BIDIR-PIM) [RFC5015], and Tags for Identifying Languages [RFC4646].