RFC 2934
Protocol Independent Multicast MIB for IPv4
Protocol Independent Multicast MIB for IPv4 🦋
RFC 2934 is the spec for a MIB module that lets network management tools see and control PIM on IPv4 routers ✨
- Number and title: RFC 2934, Protocol Independent Multicast MIB for IPv4
- Authors: K. McCloghrie (cisco Systems), D. Farinacci (Procket Networks), D. Thaler (Microsoft), B. Fenner (AT&T Labs)
- Category: Experimental 🧪
- Date: October 2000 📅
- Obsoletes / Updates: the header doesn't list either one 🙈
Status of this Memo 🌸
Bestie, this is an Experimental Protocol for the Internet community, so it's not an Internet standard of any kind. Discussion and suggestions for improvement are requested 🗣️ Distribution of this memo is unlimited 💖
Copyright Notice 💜
Copyright (C) The Internet Society (2000). All Rights Reserved. 🔒
Abstract ✨
This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. The main focus is the managed objects used for managing the Protocol Independent Multicast (PIM) protocol for IPv4. 🦋
Table of Contents 📚
1 Introduction ................................................. 2
2 The SNMP Network Management Framework ........................ 2
3 Overview ..................................................... 3
4 Definitions .................................................. 4
5 Security Considerations ...................................... 22
6 Intellectual Property Notice ................................. 23
7 Acknowledgements ............................................. 23
8 Authors' Addresses ........................................... 24
9 References ................................................... 24
10 Full Copyright Statement .................................... 271. Introduction 💖
So this section sets the scene. The memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects used for managing the Protocol Independent Multicast (PIM) protocol [16,17,18,19]. 🌈
This MIB module is applicable to IPv4 multicast routers which implement PIM. It does not support management of PIM for other address families, including IPv6. Such management may be supported by other MIBs 🫶
2. The SNMP Network Management Framework 🧚
The SNMP Management Framework presently has five major components, and honestly it's a whole ecosystem:
- An overall architecture, described in RFC 2271 [1].
- Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and is described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The second version, called SMIv2, is described in STD 58, RFC 2578 [5], STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7].
- Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and is described in STD 15, RFC 1157 [8]. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and is described in RFC 1901 [9] and RFC 1906 [10]. The third version of the message protocol is called SNMPv3 and is described in RFC 1906 [10], RFC 2572 [11] and RFC 2574 [12].
- Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [8]. A second set of protocol operations and associated PDU formats is described in RFC 1905 [13].
- A set of fundamental applications described in RFC 2573 [14], and the view-based access control mechanism described in RFC 2575 [15]. 🔥
Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI 👑
This memo specifies a MIB module that is compliant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB must be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB 🙈
3. Overview 🍓
This MIB module contains one scalar and eight tables. Some of the objects in these tables are deprecated. This MIB contains deprecated objects since they are necessary for managing PIMv1 routers, but PIMv1 itself is obsoleted by PIMv2 [18,19]. 💅
The tables contained in this MIB are:
- The PIM Interface Table contains one row for each of the router's PIM interfaces.
- The PIM Neighbor Table contains one row for each of the router's PIM neighbors.
- The PIM IP Multicast Route Table contains one row for each multicast routing entry whose incoming interface is running PIM.
- The PIM Next Hop Table which contains one row for each outgoing interface list entry in the multicast routing table whose interface is running PIM, and whose state is pruned.
- The (deprecated) PIM RP Table contains the PIM (version 1) information for IP multicast groups which is common to all RPs of a group.
- The PIM RP-Set Table contains the PIM (version 2) information for sets of candidate Rendezvous Points (RPs) for IP multicast group addresses with particular address prefixes.
- The PIM Candidate-RP Table contains the IP multicast groups for which the local router is to advertise itself as a Candidate-RP. If this table is empty, then the local router advertises itself as a Candidate-RP for all groups.
- The PIM Component Table contains one row for each of the PIM domains to which the router is connected. 🎀
4. Definitions 🫧
PIM-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, experimental,
NOTIFICATION-TYPE,
Integer32, IpAddress, TimeTicks FROM SNMPv2-SMI
RowStatus, TruthValue FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP,
NOTIFICATION-GROUP FROM SNMPv2-CONF
ipMRouteGroup, ipMRouteSource,
ipMRouteSourceMask, ipMRouteNextHopGroup,
ipMRouteNextHopSource, ipMRouteNextHopSourceMask,
ipMRouteNextHopIfIndex,
ipMRouteNextHopAddress FROM IPMROUTE-STD-MIB
InterfaceIndex FROM IF-MIB;
pimMIB MODULE-IDENTITY
LAST-UPDATED "200009280000Z" -- September 28, 2000
ORGANIZATION "IETF IDMR Working Group."
CONTACT-INFO
" Dave Thaler
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052-6399
US
Phone: +1 425 703 8835
EMail: dthaler@microsoft.com"
DESCRIPTION
"The MIB module for management of PIM routers."
REVISION "200009280000Z" -- September 28, 2000
DESCRIPTION
"Initial version, published as RFC 2934."
::= { experimental 61 }
pimMIBObjects OBJECT IDENTIFIER ::= { pimMIB 1 }
pimTraps OBJECT IDENTIFIER ::= { pimMIBObjects 0 }
pim OBJECT IDENTIFIER ::= { pimMIBObjects 1 }
pimJoinPruneInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The default interval at which periodic PIM-SM Join/Prune
messages are to be sent."
::= { pim 1 }
-- The PIM Interface Table
pimInterfaceTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the router's PIM interfaces.
IGMP and PIM are enabled on all interfaces listed in this
table."
::= { pim 2 }
pimInterfaceEntry OBJECT-TYPE
SYNTAX PimInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimInterfaceTable."
INDEX { pimInterfaceIfIndex }
::= { pimInterfaceTable 1 }
PimInterfaceEntry ::= SEQUENCE {
pimInterfaceIfIndex InterfaceIndex,
pimInterfaceAddress IpAddress,
pimInterfaceNetMask IpAddress,
pimInterfaceMode INTEGER,
pimInterfaceDR IpAddress,
pimInterfaceHelloInterval Integer32,
pimInterfaceStatus RowStatus,
pimInterfaceJoinPruneInterval Integer32,
pimInterfaceCBSRPreference Integer32
}
pimInterfaceIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of this PIM interface."
::= { pimInterfaceEntry 1 }
pimInterfaceAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the PIM interface."
::= { pimInterfaceEntry 2 }
pimInterfaceNetMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The network mask for the IP address of the PIM interface."
::= { pimInterfaceEntry 3 }
pimInterfaceMode OBJECT-TYPE
SYNTAX INTEGER { dense(1), sparse(2), sparseDense(3) }
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The configured mode of this PIM interface. A value of
sparseDense is only valid for PIMv1."
DEFVAL { dense }
::= { pimInterfaceEntry 4 }
pimInterfaceDR OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Designated Router on this PIM interface. For point-to-
point interfaces, this object has the value 0.0.0.0."
::= { pimInterfaceEntry 5 }
pimInterfaceHelloInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The frequency at which PIM Hello messages are transmitted
on this interface."
DEFVAL { 30 }
::= { pimInterfaceEntry 6 }
pimInterfaceStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry. Creating the entry enables PIM
on the interface; destroying the entry disables PIM on the
interface."
::= { pimInterfaceEntry 7 }
pimInterfaceJoinPruneInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The frequency at which PIM Join/Prune messages are
transmitted on this PIM interface. The default value of
this object is the pimJoinPruneInterval."
::= { pimInterfaceEntry 8 }
pimInterfaceCBSRPreference OBJECT-TYPE
SYNTAX Integer32 (-1..255)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The preference value for the local interface as a candidate
bootstrap router. The value of -1 is used to indicate that
the local interface is not a candidate BSR interface."
DEFVAL { 0 }
::= { pimInterfaceEntry 9 }
-- The PIM Neighbor Tableokay bestie, the neighbor table is basically the router's friend list 💖 and the multicast route table is next 🦋
pimNeighborTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimNeighborEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the router's PIM neighbors."
::= { pim 3 }
pimNeighborEntry OBJECT-TYPE
SYNTAX PimNeighborEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimNeighborTable."
INDEX { pimNeighborAddress }
::= { pimNeighborTable 1 }
PimNeighborEntry ::= SEQUENCE {
pimNeighborAddress IpAddress,
pimNeighborIfIndex InterfaceIndex,
pimNeighborUpTime TimeTicks,
pimNeighborExpiryTime TimeTicks,
pimNeighborMode INTEGER
}
pimNeighborAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the PIM neighbor for which this entry
contains information."
::= { pimNeighborEntry 1 }
pimNeighborIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of ifIndex for the interface used to reach this
PIM neighbor."
::= { pimNeighborEntry 2 }
pimNeighborUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time since this PIM neighbor (last) became a neighbor
of the local router."
::= { pimNeighborEntry 3 }
pimNeighborExpiryTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The minimum time remaining before this PIM neighbor will be
aged out."
::= { pimNeighborEntry 4 }
pimNeighborMode OBJECT-TYPE
SYNTAX INTEGER { dense(1), sparse(2) }
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The active PIM mode of this neighbor. This object is
deprecated for PIMv2 routers since all neighbors on the
interface must be either dense or sparse as determined by
the protocol running on the interface."
::= { pimNeighborEntry 5 }
--
-- The PIM IP Multicast Route Table
--
pimIpMRouteTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimIpMRouteEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing PIM-specific information on
a subset of the rows of the ipMRouteTable defined in the IP
Multicast MIB."
::= { pim 4 }
pimIpMRouteEntry OBJECT-TYPE
SYNTAX PimIpMRouteEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimIpMRouteTable. There
is one entry per entry in the ipMRouteTable whose incoming
interface is running PIM."
INDEX { ipMRouteGroup, ipMRouteSource, ipMRouteSourceMask }
::= { pimIpMRouteTable 1 }
PimIpMRouteEntry ::= SEQUENCE {
pimIpMRouteUpstreamAssertTimer TimeTicks,
pimIpMRouteAssertMetric Integer32,
pimIpMRouteAssertMetricPref Integer32,
pimIpMRouteAssertRPTBit TruthValue,
pimIpMRouteFlags BITS
}
pimIpMRouteUpstreamAssertTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time remaining before the router changes its upstream
neighbor back to its RPF neighbor. This timer is called the
Assert timer in the PIM Sparse and Dense mode specification.
A value of 0 indicates that no Assert has changed the
upstream neighbor away from the RPF neighbor."
::= { pimIpMRouteEntry 1 }
pimIpMRouteAssertMetric OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The metric advertised by the assert winner on the upstream
interface, or 0 if no such assert is in received."
::= { pimIpMRouteEntry 2 }
pimIpMRouteAssertMetricPref OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The preference advertised by the assert winner on the
upstream interface, or 0 if no such assert is in effect."
::= { pimIpMRouteEntry 3 }
pimIpMRouteAssertRPTBit OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of the RPT-bit advertised by the assert winner on
the upstream interface, or false if no such assert is in
effect."
::= { pimIpMRouteEntry 4 }
pimIpMRouteFlags OBJECT-TYPE
SYNTAX BITS {
rpt(0),
spt(1)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object describes PIM-specific flags related to a
multicast state entry. See the PIM Sparse Mode
specification for the meaning of the RPT and SPT bits."
::= { pimIpMRouteEntry 5 }ngl the next hop table is giving "one entry per row, every row has a reason" 🔥
--
-- The PIM Next Hop Table
--
pimIpMRouteNextHopTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimIpMRouteNextHopEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing PIM-specific information on
a subset of the rows of the ipMRouteNextHopTable defined in
the IP Multicast MIB."
::= { pim 7 }
pimIpMRouteNextHopEntry OBJECT-TYPE
SYNTAX PimIpMRouteNextHopEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimIpMRouteNextHopTable.
There is one entry per entry in the ipMRouteNextHopTable
whose interface is running PIM and whose
ipMRouteNextHopState is pruned(1)."
INDEX { ipMRouteNextHopGroup, ipMRouteNextHopSource,
ipMRouteNextHopSourceMask, ipMRouteNextHopIfIndex,
ipMRouteNextHopAddress }
::= { pimIpMRouteNextHopTable 1 }
PimIpMRouteNextHopEntry ::= SEQUENCE {
pimIpMRouteNextHopPruneReason INTEGER
}
pimIpMRouteNextHopPruneReason OBJECT-TYPE
SYNTAX INTEGER {
other (1),
prune (2),
assert (3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates why the downstream interface was
pruned, whether in response to a PIM prune message or due to
PIM Assert processing."
::= { pimIpMRouteNextHopEntry 2 }
-- The PIM RP Table
pimRPTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimRPEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"The (conceptual) table listing PIM version 1 information
for the Rendezvous Points (RPs) for IP multicast groups.
This table is deprecated since its function is replaced by
the pimRPSetTable for PIM version 2."
::= { pim 5 }
pimRPEntry OBJECT-TYPE
SYNTAX PimRPEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"An entry (conceptual row) in the pimRPTable. There is one
entry per RP address for each IP multicast group."
INDEX { pimRPGroupAddress, pimRPAddress }
::= { pimRPTable 1 }
PimRPEntry ::= SEQUENCE {
pimRPGroupAddress IpAddress,
pimRPAddress IpAddress,
pimRPState INTEGER,
pimRPStateTimer TimeTicks,
pimRPLastChange TimeTicks,
pimRPRowStatus RowStatus
}
pimRPGroupAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"The IP multicast group address for which this entry
contains information about an RP."
::= { pimRPEntry 1 }
pimRPAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"The unicast address of the RP."
::= { pimRPEntry 2 }
pimRPState OBJECT-TYPE
SYNTAX INTEGER { up(1), down(2) }
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The state of the RP."
::= { pimRPEntry 3 }
pimRPStateTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The minimum time remaining before the next state change.
When pimRPState is up, this is the minimum time which must
expire until it can be declared down. When pimRPState is
down, this is the time until it will be declared up (in
order to retry)."
::= { pimRPEntry 4 }
pimRPLastChange OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The value of sysUpTime at the time when the corresponding
instance of pimRPState last changed its value."
::= { pimRPEntry 5 }
pimRPRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The status of this row, by which new entries may be
created, or old entries deleted from this table."
::= { pimRPEntry 6 }the RP-set table is where the candidate RPs live, and it's giving main character energy 👑
-- The PIM RP-Set Table
pimRPSetTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimRPSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing PIM information for
candidate Rendezvous Points (RPs) for IP multicast groups.
When the local router is the BSR, this information is
obtained from received Candidate-RP-Advertisements. When
the local router is not the BSR, this information is
obtained from received RP-Set messages."
::= { pim 6 }
pimRPSetEntry OBJECT-TYPE
SYNTAX PimRPSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimRPSetTable."
INDEX { pimRPSetComponent, pimRPSetGroupAddress,
pimRPSetGroupMask, pimRPSetAddress }
::= { pimRPSetTable 1 }
PimRPSetEntry ::= SEQUENCE {
pimRPSetGroupAddress IpAddress,
pimRPSetGroupMask IpAddress,
pimRPSetAddress IpAddress,
pimRPSetHoldTime Integer32,
pimRPSetExpiryTime TimeTicks,
pimRPSetComponent Integer32
}
pimRPSetGroupAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP multicast group address which, when combined with
pimRPSetGroupMask, gives the group prefix for which this
entry contains information about the Candidate-RP."
::= { pimRPSetEntry 1 }
pimRPSetGroupMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The multicast group address mask which, when combined with
pimRPSetGroupAddress, gives the group prefix for which this
entry contains information about the Candidate-RP."
::= { pimRPSetEntry 2 }
pimRPSetAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the Candidate-RP."
::= { pimRPSetEntry 3 }
pimRPSetHoldTime OBJECT-TYPE
SYNTAX Integer32 (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The holdtime of a Candidate-RP. If the local router is not
the BSR, this value is 0."
::= { pimRPSetEntry 4 }
pimRPSetExpiryTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The minimum time remaining before the Candidate-RP will be
declared down. If the local router is not the BSR, this
value is 0."
::= { pimRPSetEntry 5 }pimRPSetComponent OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
" A number uniquely identifying the component. Each
protocol instance connected to a separate domain should have
a different index value."
::= { pimRPSetEntry 6 }Okay so this one is the component index for the RP-Set table, and it's giving "pick a unique number per domain" energy 🧚✨ Every protocol instance hooked up to its own domain gets its own index, so nobody gets mixed up. Iconic behaviour, honestly 💅
--
-- Note: { pim 8 } through { pim 10 } were used in older versions
-- of this MIB. Since some earlier versions of this MIB have been
-- widely-deployed, these values must not be used in the future,
-- as long the MIB is rooted under { experimental 61 }.
--
-- The PIM Candidate-RP Table
pimCandidateRPTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimCandidateRPEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the IP multicast groups for
which the local router is to advertise itself as a
Candidate-RP when the value of pimComponentCRPHoldTime is
non-zero. If this table is empty, then the local router
will advertise itself as a Candidate-RP for all groups
(providing the value of pimComponentCRPHoldTime is non-
zero)."
::= { pim 11 }
pimCandidateRPEntry OBJECT-TYPE
SYNTAX PimCandidateRPEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimCandidateRPTable."
INDEX { pimCandidateRPGroupAddress,
pimCandidateRPGroupMask }
::= { pimCandidateRPTable 1 }
PimCandidateRPEntry ::= SEQUENCE {
pimCandidateRPGroupAddress IpAddress,
pimCandidateRPGroupMask IpAddress,
pimCandidateRPAddress IpAddress,
pimCandidateRPRowStatus RowStatus
}
pimCandidateRPGroupAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP multicast group address which, when combined with
pimCandidateRPGroupMask, identifies a group prefix for which
the local router will advertise itself as a Candidate-RP."
::= { pimCandidateRPEntry 1 }
pimCandidateRPGroupMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The multicast group address mask which, when combined with
pimCandidateRPGroupMask, identifies a group prefix for which
the local router will advertise itself as a Candidate-RP."
::= { pimCandidateRPEntry 2 }
pimCandidateRPAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The (unicast) address of the interface which will be
advertised as a Candidate-RP."
::= { pimCandidateRPEntry 3 }
pimCandidateRPRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row, by which new entries may be
created, or old entries deleted from this table."
::= { pimCandidateRPEntry 4 }Okay the Candidate-RP table is literally a guest list 🎀 It's the groups your router is willing to be the RP for, and if the list is empty, it just says yes to everyone (main character energy, no notes 👑). The Note up top is also a little time-capsule moment: those old { pim 8 } through { pim 10 } numbers are off-limits forever because older versions got widely deployed 🙈
-- The PIM Component Table
pimComponentTable OBJECT-TYPE
SYNTAX SEQUENCE OF PimComponentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table containing objects specific to a PIM
domain. One row exists for each domain to which the router
is connected. A PIM-SM domain is defined as an area of the
network over which Bootstrap messages are forwarded.
Typically, a PIM-SM router will be a member of exactly one
domain. This table also supports, however, routers which
may form a border between two PIM-SM domains and do not
forward Bootstrap messages between them."
::= { pim 12 }
pimComponentEntry OBJECT-TYPE
SYNTAX PimComponentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the pimComponentTable."
INDEX { pimComponentIndex }
::= { pimComponentTable 1 }
PimComponentEntry ::= SEQUENCE {
pimComponentIndex Integer32,
pimComponentBSRAddress IpAddress,
pimComponentBSRExpiryTime TimeTicks,
pimComponentCRPHoldTime Integer32,
pimComponentStatus RowStatus
}
pimComponentIndex OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A number uniquely identifying the component. Each protocol
instance connected to a separate domain should have a
different index value. Routers that only support membership
in a single PIM-SM domain should use a pimComponentIndex
value of 1."
::= { pimComponentEntry 1 }
pimComponentBSRAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the bootstrap router (BSR) for the local
PIM region."
::= { pimComponentEntry 2 }
pimComponentBSRExpiryTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The minimum time remaining before the bootstrap router in
the local domain will be declared down. For candidate BSRs,
this is the time until the component sends an RP-Set
message. For other routers, this is the time until it may
accept an RP-Set message from a lower candidate BSR."
::= { pimComponentEntry 3 }
pimComponentCRPHoldTime OBJECT-TYPE
SYNTAX Integer32 (0..255)
UNITS "seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The holdtime of the component when it is a candidate RP in
the local domain. The value of 0 is used to indicate that
the local system is not a Candidate-RP."
DEFVAL { 0 }
::= { pimComponentEntry 4 }
pimComponentStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry. Creating the entry creates
another protocol instance; destroying the entry disables a
protocol instance."
::= { pimComponentEntry 5 }The Component Table is where a router keeps track of each PIM domain it's plugged into 🌸 One row per domain, and most routers just live in one domain, which is so relatable. Creating a row literally spins up a new protocol instance, and deleting one shuts it down, so it's giving very dramatic power move ✨
-- PIM Traps
pimNeighborLoss NOTIFICATION-TYPE
OBJECTS {
pimNeighborIfIndex
}
STATUS current
DESCRIPTION
"A pimNeighborLoss trap signifies the loss of an adjacency
with a neighbor. This trap should be generated when the
neighbor timer expires, and the router has no other
neighbors on the same interface with a lower IP address than
itself."
::= { pimTraps 1 }
-- conformance information
pimMIBConformance OBJECT IDENTIFIER ::= { pimMIB 2 }
pimMIBCompliances OBJECT IDENTIFIER ::= { pimMIBConformance 1 }
pimMIBGroups OBJECT IDENTIFIER ::= { pimMIBConformance 2 }
-- compliance statements
pimV1MIBCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The compliance statement for routers running PIMv1 and
implementing the PIM MIB."
MODULE -- this module
MANDATORY-GROUPS { pimV1MIBGroup }
::= { pimMIBCompliances 1 }
pimSparseV2MIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for routers running PIM Sparse
Mode and implementing the PIM MIB."
MODULE -- this module
MANDATORY-GROUPS { pimV2MIBGroup }
GROUP pimV2CandidateRPMIBGroup
DESCRIPTION
"This group is mandatory if the router is capable of being a
Candidate RP."
OBJECT pimInterfaceStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { pimMIBCompliances 2 }
pimDenseV2MIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for routers running PIM Dense Mode
and implementing the PIM MIB."
MODULE -- this module
MANDATORY-GROUPS { pimDenseV2MIBGroup }
OBJECT pimInterfaceStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { pimMIBCompliances 3 }
-- units of conformance
pimNotificationGroup NOTIFICATION-GROUP
NOTIFICATIONS { pimNeighborLoss }
STATUS current
DESCRIPTION
"A collection of notifications for signaling important PIM
events."
::= { pimMIBGroups 1 }
pimV2MIBGroup OBJECT-GROUP
OBJECTS { pimJoinPruneInterval, pimNeighborIfIndex,
pimNeighborUpTime, pimNeighborExpiryTime,
pimInterfaceAddress, pimInterfaceNetMask,
pimInterfaceDR, pimInterfaceHelloInterval,
pimInterfaceStatus, pimInterfaceJoinPruneInterval,
pimInterfaceCBSRPreference, pimInterfaceMode,
pimRPSetHoldTime, pimRPSetExpiryTime,
pimComponentBSRAddress, pimComponentBSRExpiryTime,
pimComponentCRPHoldTime, pimComponentStatus,
pimIpMRouteFlags, pimIpMRouteUpstreamAssertTimer
}
STATUS current
DESCRIPTION
"A collection of objects to support management of PIM Sparse
Mode (version 2) routers."
::= { pimMIBGroups 2 }
pimDenseV2MIBGroup OBJECT-GROUP
OBJECTS { pimNeighborIfIndex,
pimNeighborUpTime, pimNeighborExpiryTime,
pimInterfaceAddress, pimInterfaceNetMask,
pimInterfaceDR, pimInterfaceHelloInterval,
pimInterfaceStatus, pimInterfaceMode
}
STATUS current
DESCRIPTION
"A collection of objects to support management of PIM Dense
Mode (version 2) routers."
::= { pimMIBGroups 5 }
pimV2CandidateRPMIBGroup OBJECT-GROUP
OBJECTS { pimCandidateRPAddress,
pimCandidateRPRowStatus
}
STATUS current
DESCRIPTION
"A collection of objects to support configuration of which
groups a router is to advertise itself as a Candidate-RP."
::= { pimMIBGroups 3 }
pimV1MIBGroup OBJECT-GROUP
OBJECTS { pimJoinPruneInterval, pimNeighborIfIndex,
pimNeighborUpTime, pimNeighborExpiryTime,
pimNeighborMode,
pimInterfaceAddress, pimInterfaceNetMask,
pimInterfaceJoinPruneInterval, pimInterfaceStatus,
pimInterfaceMode, pimInterfaceDR,
pimInterfaceHelloInterval,
pimRPState, pimRPStateTimer,
pimRPLastChange, pimRPRowStatus
}
STATUS deprecated
DESCRIPTION
"A collection of objects to support management of PIM
(version 1) routers."
::= { pimMIBGroups 4 }
pimNextHopGroup OBJECT-GROUP
OBJECTS { pimIpMRouteNextHopPruneReason }
STATUS current
DESCRIPTION
"A collection of optional objects to provide per-next hop
information for diagnostic purposes. Supporting this group
may add a large number of instances to a tree walk, but the
information in this group can be extremely useful in
tracking down multicast connectivity problems."
::= { pimMIBGroups 6 }Heads up bestie: the traps and compliance statements are where the router promises what it actually supports, so the names and group numbers have to match exactly 🫶
pimAssertGroup OBJECT-GROUP
OBJECTS { pimIpMRouteAssertMetric, pimIpMRouteAssertMetricPref,
pimIpMRouteAssertRPTBit }
STATUS current
DESCRIPTION
"A collection of optional objects to provide extra
information about the assert election process. There is no
protocol reason to keep such information, but some
implementations may already keep this information and make
it available. These objects can also be very useful in
debugging connectivity or duplicate packet problems,
especially if the assert winner does not support the PIM and
IP Multicast MIBs."
::= { pimMIBGroups 7 }
END5. Security Considerations 🔐
Okay bestie, this MIB has readable objects whose values spill info about multicast routing, including the network topology 👀. There are also a bunch of objects with a MAX-ACCESS of read-write and/or read-create, which let an admin configure PIM on the router 🛠️.
Reading the readable objects is pretty innocuous, but unauthorized access to the writable objects could cause a denial of service 💀. So supporting SET operations in a non-secure environment without proper protection can seriously mess with network operations 😭.
SNMPv1 on its own is such an insecure vibe 🙃. Even if the network itself is secure (for example by using IPSec), there is still zero control over who on that secure network is allowed to access and SET (change/create/delete) the objects in this MIB.
It is recommended that the implementers consider the security features provided by the SNMPv3 framework 🛡️. Specifically, the use of the User-based Security Model RFC 2274 [12] and the View-based Access Control Model RFC 2275 [15] is recommended.
It is then a customer/user responsibility to make sure the SNMP entity giving access to this MIB is properly configured, so those objects are only accessible to the principals (users) who have legitimate rights to them 💖.
6. Intellectual Property Notice 🦋
The IETF doesn't take a position on the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology in this document, or on whether any license under those rights might or might not be available. It also doesn't claim it has made any effort to identify such rights. Info on the IETF's procedures for rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claimed rights made available for publication, any assurances of licenses to be made available, or the result of an attempt to get a general license or permission for implementers or users of this specification to use such proprietary rights can be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology required to practice this standard. Please send that info to the IETF Executive Director 📬.
7. Acknowledgements 🫶
This MIB module has been updated based on feedback from the IETF's Inter-Domain Multicast Routing (IDMR) Working Group. The people in that group are literally the reason this module is as good as it is 🌈.
8. Authors' Addresses ✨
Keith McCloghrie
cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
Phone: +1 408 526 5260
EMail: kzm@cisco.com
Dino Farinacci
Procket Networks
3850 North First Street
San Jose, CA 95134
Phone: +1 408-954-7909
Email: dino@procket.com
Dave Thaler
Microsoft Corporation
One Microsoft Way
Redmond, WA 98052-6399
Phone: +1 425 703 8835
EMail: dthaler@microsoft.com
Bill Fenner
AT&T Labs - Research
75 Willow Rd.
Menlo Park, CA 94025
Phone: +1 650 330 7893
EMail: fenner@research.att.com9. References 📚
- [1] Wijnen, B., Harrington, D. and R. Presuhn, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999.
- [2] Rose, M. and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
- [3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991.
- [4] Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991.
- [5] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
- [6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999.
- [7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999.
- [8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990.
- [9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996.
- [10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996.
- [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999.
- [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999.
- [13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996.
- [14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC 2573, April 1999.
- [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999.
- [16] Deering, S., Estrin, D., Farinacci, D., Jacobson, V., Liu, G. and L. Wei, "Protocol Independent Multicast (PIM): Motivation and Architecture", Work in Progress.
- [17] Deering, S., Estrin, D., Farinacci, D., Jacobson, V., Liu, G. and L. Wei, "Protocol Independent Multicast (PIM): Protocol Specification", Work in Progress.
- [18] Estrin, D., Farinacci, D., Helmy, A., Thaler, D., Deering, S., Handley, M., Jacobson, V., Liu, C., Sharma, P. and L. Wei, "Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification", RFC 2362, June 1998.
- [19] Deering, S., Estrin, D., Farinacci, D., Jacobson, V., Helmy, A. and L. Wei, "Protocol Independent Multicast Version 2, Dense Mode Specification", Work in Progress.
- [20] McCloghrie, K., Farinacci, D. and D. Thaler, "IPv4 Multicast Routing MIB", RFC 2932, October 2000.
10. Full Copyright Statement ⚖️
Copyright (C) The Internet Society (2000). All Rights Reserved.
This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.
The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns.
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Acknowledgement 🌸
Funding for the RFC Editor function is currently provided by the Internet Society. 💅
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