CISCO-IETF-IPMROUTE-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2006-08-24

Category: Cisco Devices, Routing Protocols

Description: Monitors IP multicast routing state, including multicast route tables and packet statistics for multicast protocols.

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What Is CISCO-IETF-IPMROUTE-MIB?

CISCO-IETF-IPMROUTE-MIB is a Cisco-authored, address-family-independent MIB for managing IP multicast routing state, created because no address-family-independent RFC/Internet-Draft existed at the time; it is based on RFC 2932 with extensions supporting multiple address families, independent of the specific multicast routing protocol (PIM, DVMRP, etc.) in use. It exposes the multicast routing table itself — per-(source,group) route entries with upstream neighbor, incoming interface, uptime, and expiry — plus a global multicast-routing enable flag and route-count summary. Its monitoring value is protocol/software status for multicast forwarding: tracking cIpMRouteEntryCount and per-entry cIpMRouteUpTime/ExpiryTime reveals whether multicast routes are being established and refreshed correctly, and a route nearing expiry without renewal signals a stalled multicast source or receiver. It is explicitly based on RFC 2932 (the standard IP multicast MIB) with Cisco's address-family-independent extensions, pending a stable IETF replacement. It is deployed on Cisco routers and switches performing IP multicast routing (PIM-SM/SSM, etc.). Engineers can download the CISCO-IETF-IPMROUTE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-IPMROUTE-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco router/switch (IP multicast routing)

Monitoring Examples

An admin can check cIpMRouteEnable to confirm multicast routing is globally active, then walk cIpMRouteTable keyed by cIpMRouteGroup and cIpMRouteSource to see each active multicast route's cIpMRouteUpstreamNeighbor and cIpMRouteInIfIndex. A route whose cIpMRouteExpiryTime is imminent without a corresponding refresh (reflected in cIpMRouteUpTime resetting) suggests the upstream join state is not being refreshed, indicating a multicast source or RPF path problem. cIpMRouteEntryCount trending unexpectedly high can indicate multicast route-table growth from a misbehaving source flooding many (S,G) states.

What Can Be Monitored

multicast routing enable state
active multicast route count
per-route upstream neighbor and incoming interface
route uptime and expiry time
source/group route entries

Imported Objects

From CISCO-SMI

ciscoExperiment

OBJECT-IDENTITY

From IANA-RTPROTO-MIB

IANAipMRouteProtocol
IANAipRouteProtocol

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From INET-ADDRESS-MIB

InetAddress
InetAddressPrefixLength
InetAddressType
InetVersion

From IPMROUTE-STD-MIB

LanguageTag

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks

From SNMPv2-TC

RowStatus
TruthValue

How to Use in IPNetwork Monitor

Example using cIpMRoutePkts OID:

Select a Cisco router/switch (IP multicast routing) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type cIpMRoutePkts into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of packets which this router has received from these sources and addressed to this multicast group address. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
cIpMRoute	1.3.6.1.4.1.9.10.117.1.1
IPt cIpMRouteAddrType	1.3.6.1.4.1.9.10.117.1.1.2.1.1	InetAddressType	not-accessible	The type of InetAddress for the IP multicast group address for which this entry contains multicast routing information.
IP cIpMRouteBoundaryAddress	1.3.6.1.4.1.9.10.117.1.1.5.1.4	InetAddress	not-accessible	The group address which when combined with the corresponding value of cIpMRouteBoundaryAddressMask identifies the group range for which the scoped boundary exists.
ADR cIpMRouteBoundaryAddressMask	1.3.6.1.4.1.9.10.117.1.1.5.1.5	InetAddressPrefixLength	not-accessible	The group address mask which when combined with the corresponding value of cIpMRouteBoundaryAddress identifies the group range for which the scoped boundary exists.
IPt cIpMRouteBoundaryAddressType	1.3.6.1.4.1.9.10.117.1.1.5.1.3	InetAddressType	not-accessible	The type of InetAddress representing the cIpMRouteBoundaryAddress.
cIpMRouteBoundaryEntry	1.3.6.1.4.1.9.10.117.1.1.5.1		not-accessible	An entry (conceptual row) in the cIpMRouteBoundaryTable representing a scoped boundary.
NUM cIpMRouteBoundaryIfIndex	1.3.6.1.4.1.9.10.117.1.1.5.1.2	InterfaceIndex	not-accessible	The IfIndex value for the interface to which this boundary applies. Packets with a destination address in the associated address/mask range will not be forwarded out this interface.
STR cIpMRouteBoundaryNameString	1.3.6.1.4.1.9.10.117.1.1.5.1.6	SnmpAdminString	read-create	The textual name associated with the multicast scope. The value of this object should be suitable for displaying to end-users, such as when allocating a multicast address in this scope.
I32 cIpMRouteBoundaryScopeId	1.3.6.1.4.1.9.10.117.1.1.5.1.1	Integer32	not-accessible	The scope value in the Group address to which this boundary applies. Packets with a destination address in the address/mask range associated with this scope will not be forwarded out the interface associated with the cIpMRouteBondaryIfIndex. This object is valid only for IPv6 and should take on only values 3-15. In IPv4, the value must be set to zero.
ROW cIpMRouteBoundaryStatus	1.3.6.1.4.1.9.10.117.1.1.5.1.7	RowStatus	read-create	The status of this row, by which new entries may be created, or old entries deleted from this table.
cIpMRouteBoundaryTable	1.3.6.1.4.1.9.10.117.1.1.5		not-accessible	The (conceptual) table listing the router's scoped multicast address boundaries.
C32 cIpMRouteDifferentInIfPackets	1.3.6.1.4.1.9.10.117.1.1.2.1.10	Counter32	read-only	The number of packets which this router has received from these sources and addressed to this multicast group address, which were dropped because they were not received on the interface indicated by cIpMRouteInIfIndex.
INT cIpMRouteEnable	1.3.6.1.4.1.9.10.117.1.1.1	INTEGER	read-write	The enabled status of IP Multicast routing on this router.
cIpMRouteEntry	1.3.6.1.4.1.9.10.117.1.1.2.1		not-accessible	An entry (conceptual row) containing the multicast routing information for IP datagrams from a particular source and addressed to a particular IP multicast group address. Discontinuities in counters in this entry can be detected by observing the value of cIpMRouteUpTime.
G32 cIpMRouteEntryCount	1.3.6.1.4.1.9.10.117.1.1.7	Gauge32	read-only	The number of rows in the cIpMRouteTable. This can be used to monitor the multicast routing table size.
TIK cIpMRouteExpiryTime	1.3.6.1.4.1.9.10.117.1.1.2.1.8	TimeTicks	read-only	The minimum amount of time remaining before this entry will be aged out. The value 0 indicates that the entry is not subject to aging.
IP cIpMRouteGroup	1.3.6.1.4.1.9.10.117.1.1.2.1.2	InetAddress	not-accessible	The IP multicast group address for which this entry contains multicast routing information.
C64 cIpMRouteHCOctets	1.3.6.1.4.1.9.10.117.1.1.2.1.17	Counter64	read-only	The number of octets contained in IP datagrams which were received from these sources and addressed to this multicast group address, and which were forwarded by this router. This object is a 64-bit version of cIpMRouteOctets.
NUM cIpMRouteInIfIndex	1.3.6.1.4.1.9.10.117.1.1.2.1.6	InterfaceIndexOrZero	read-only	The value of ifIndex for the interface on which IP datagrams sent by these sources to this multicast address are received (i.e., RPF Interface).
cIpMRouteInterfaceEntry	1.3.6.1.4.1.9.10.117.1.1.4.1		not-accessible	An entry (conceptual row) containing the multicast routing information for a particular interface.
C64 cIpMRouteInterfaceHCInMOctets	1.3.6.1.4.1.9.10.117.1.1.4.1.10	Counter64	read-only	The number of octets of multicast packets that have arrived on the interface, including framing characters. This object is a 64-bit version of cIpMRouteInterfaceInMcastOctets. It is similar to ifHCInOctets in the Interfaces MIB, except that only multicast packets are counted.
C64 cIpMRouteInterfaceHCInMPkts	1.3.6.1.4.1.9.10.117.1.1.4.1.12	Counter64	read-only	The number of multicast packets that have arrived on the interfaces. This object is a 64-bit version of cIpMRouteInterfaceInMcastPkts. This object is similar to ifInPkts in the Interfaces MIB, except that only multicast packets are counted.
C64 cIpMRouteInterfaceHCOutMOctets	1.3.6.1.4.1.9.10.117.1.1.4.1.11	Counter64	read-only	The number of octets of multicast packets that have been sent on the interface. This object is a 64-bit version of cIpMRouteInterfaceOutMcastOctets.
C64 cIpMRouteInterfaceHCOutMPkts	1.3.6.1.4.1.9.10.117.1.1.4.1.13	Counter64	read-only	The number of multicast packets that have been sent on the interface. This object is a 64-bit version of cIpMRouteInterfaceOutMcastPkts.
NUM cIpMRouteInterfaceIfIndex	1.3.6.1.4.1.9.10.117.1.1.4.1.1	InterfaceIndex	not-accessible	The ifIndex value of the interface for which this entry contains information.
C32 cIpMRouteInterfaceInMcastOctets	1.3.6.1.4.1.9.10.117.1.1.4.1.8	Counter32	read-only	The number of octets of multicast packets that have arrived on the interface, including framing characters. This object is similar to ifInOctets in the Interfaces MIB, except that only multicast packets are counted.
C32 cIpMRouteInterfaceInMcastPkts	1.3.6.1.4.1.9.10.117.1.1.4.1.6	Counter32	read-only	The number of multicast packets that have arrived on the interfaces. This object is similar to ifInPkts in the Interfaces MIB, except that only multicast packets are counted.
INE cIpMRouteInterfaceIPVersion	1.3.6.1.4.1.9.10.117.1.1.4.1.2	InetVersion	not-accessible	The IP version of this row.
C32 cIpMRouteInterfaceOutMcastOctets	1.3.6.1.4.1.9.10.117.1.1.4.1.9	Counter32	read-only	The number of octets of multicast packets that have been sent on the interface.
C32 cIpMRouteInterfaceOutMcastPkts	1.3.6.1.4.1.9.10.117.1.1.4.1.7	Counter32	read-only	The number of multicast packets that have been sent on the interface.
IAN cIpMRouteInterfaceProtocol	1.3.6.1.4.1.9.10.117.1.1.4.1.4	IANAipMRouteProtocol	read-only	The routing protocol running on this interface.
I32 cIpMRouteInterfaceRateLimit	1.3.6.1.4.1.9.10.117.1.1.4.1.5	Integer32	read-write	The rate-limit, in kilobits per second, of forwarded multicast traffic on the interface. A rate-limit of 0 indicates that no rate limiting is done.
cIpMRouteInterfaceTable	1.3.6.1.4.1.9.10.117.1.1.4		not-accessible	The (conceptual) table containing multicast routing information specific to interfaces.
I32 cIpMRouteInterfaceTtl	1.3.6.1.4.1.9.10.117.1.1.4.1.3	Integer32	read-write	The datagram TTL threshold for the interface. Any IP multicast datagrams with a TTL less than this threshold will not be forwarded out the interface. The default value of 0 means all multicast packets are forwarded out the interface.
cIpMRouteMIBBasicGroup	1.3.6.1.4.1.9.10.117.2.2.1			A collection of objects to support basic management of IP Multicast routing.
cIpMRouteMIBBoundaryGroup	1.3.6.1.4.1.9.10.117.2.2.3			A collection of objects to support management of scoped multicast address boundaries.
cIpMRouteMIBCompliance	1.3.6.1.4.1.9.10.117.2.1.1			The compliance statement for the IP Multicast Routing MIB.
cIpMRouteMIBComplianceRev1	1.3.6.1.4.1.9.10.117.2.1.2			The compliance statement for the IP Multicast Routing MIB.
cIpMRouteMIBCompliances	1.3.6.1.4.1.9.10.117.2.1
cIpMRouteMIBConformance	1.3.6.1.4.1.9.10.117.2
cIpMRouteMIBGroups	1.3.6.1.4.1.9.10.117.2.2
cIpMRouteMIBHCInterfaceGroup	1.3.6.1.4.1.9.10.117.2.2.5			A collection of objects providing information specific to high speed (greater than 20,000,000 bits/second) network interfaces.
cIpMRouteMIBHCInterfaceGroupSup1	1.3.6.1.4.1.9.10.117.2.2.8			A collection of objects providing information specific to high speed (greater than 20,000,000 bits/second) network interfaces.
cIpMRouteMIBHopCountGroup	1.3.6.1.4.1.9.10.117.2.2.2			A collection of objects to support management of the use of hop counts in IP Multicast routing.
cIpMRouteMIBObjects	1.3.6.1.4.1.9.10.117.1
cIpMRouteMIBPktsGroup	1.3.6.1.4.1.9.10.117.2.2.7			A collection of objects to support management of packet counters for each forwarding entry.
cIpMRouteMIBPktsOutGroup	1.3.6.1.4.1.9.10.117.2.2.4			A collection of objects to support management of packet counters for each outgoing interface entry of a route.
cIpMRouteMIBRouteGroup	1.3.6.1.4.1.9.10.117.2.2.6			A collection of objects providing information on the relationship between multicast routing information, and the IP Forwarding Table.
IP cIpMRouteNextHopAddress	1.3.6.1.4.1.9.10.117.1.1.3.1.6	InetAddress	not-accessible	The address of the next-hop specific to this entry. For most interfaces, this is identical to cIpMRouteNextHopGroup. NBMA interfaces, however, may have multiple next-hop addresses out a single outgoing interface.
IPt cIpMRouteNextHopAddrType	1.3.6.1.4.1.9.10.117.1.1.3.1.1	InetAddressType	not-accessible	The type of InetAddress representing the IP multicast group.
I32 cIpMRouteNextHopClosestHops	1.3.6.1.4.1.9.10.117.1.1.3.1.10	Integer32	read-only	The minimum number of hops between this router and any member of this IP multicast group reached via this next-hop on this outgoing interface. Any IP multicast datagrams for the group which have a TTL less than this number of hops will not be forwarded to this next-hop.
cIpMRouteNextHopEntry	1.3.6.1.4.1.9.10.117.1.1.3.1		not-accessible	An entry (conceptual row) in the list of next-hops on outgoing interfaces to which IP multicast datagrams from particular sources to a IP multicast group address are routed. Discontinuities in counters in this entry can be detected by observing the value of cIpMRouteUpTime.
TIK cIpMRouteNextHopExpiryTime	1.3.6.1.4.1.9.10.117.1.1.3.1.9	TimeTicks	read-only	The minimum amount of time remaining before this entry will be aged out. If cIpMRouteNextHopState is pruned(1), the remaining time until the prune expires and the state reverts to forwarding(2). Otherwise, the remaining time until this entry is removed from the table. The time remaining may be copied from cIpMRouteExpiryTime if the protocol in use for this entry does not specify next-hop timers. The value 0 indicates that the entry is not subject to aging.
IP cIpMRouteNextHopGroup	1.3.6.1.4.1.9.10.117.1.1.3.1.2	InetAddress	not-accessible	The IP multicast group for which this entry specifies a next-hop on an outgoing interface.
NUM cIpMRouteNextHopIfIndex	1.3.6.1.4.1.9.10.117.1.1.3.1.5	InterfaceIndex	not-accessible	The ifIndex value of the interface for the outgoing interface for this next-hop.
C32 cIpMRouteNextHopPkts	1.3.6.1.4.1.9.10.117.1.1.3.1.12	Counter32	read-only	The number of packets which have been forwarded using this route.
IAN cIpMRouteNextHopProtocol	1.3.6.1.4.1.9.10.117.1.1.3.1.11	IANAipMRouteProtocol	read-only	The routing mechanism via which this next-hop was learned.
IP cIpMRouteNextHopSource	1.3.6.1.4.1.9.10.117.1.1.3.1.3	InetAddress	not-accessible	The network address which when combined with the corresponding value of cIpMRouteNextHopSourceMask identifies the sources for which this entry specifies a next-hop on an outgoing interface.
ADR cIpMRouteNextHopSourceMask	1.3.6.1.4.1.9.10.117.1.1.3.1.4	InetAddressPrefixLength	not-accessible	The network mask which when combined with the corresponding value of cIpMRouteNextHopSource identifies the sources for which this entry specifies a next-hop on an outgoing interface.
INT cIpMRouteNextHopState	1.3.6.1.4.1.9.10.117.1.1.3.1.7	INTEGER	read-only	An indication of whether the outgoing interface and next- hop represented by this entry is currently being used to forward IP datagrams. The value 'forwarding' indicates it is currently being used; the value 'pruned' indicates it is not.
cIpMRouteNextHopTable	1.3.6.1.4.1.9.10.117.1.1.3		not-accessible	The (conceptual) table containing information on the next- hops on outgoing interfaces for routing 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.
TIK cIpMRouteNextHopUpTime	1.3.6.1.4.1.9.10.117.1.1.3.1.8	TimeTicks	read-only	The time since the multicast routing information represented by this entry was learned by the router.
C32 cIpMRouteOctets	1.3.6.1.4.1.9.10.117.1.1.2.1.11	Counter32	read-only	The number of octets contained in IP datagrams which were received from these sources and addressed to this multicast group address, and which were forwarded by this router.
C32 cIpMRoutePktsEx	1.3.6.1.4.1.9.10.117.1.1.2.1.9	Counter32	read-only	The number of packets which this router has received from these sources and addressed to this multicast group address.
IAN cIpMRouteProtocol	1.3.6.1.4.1.9.10.117.1.1.2.1.12	IANAipMRouteProtocol	read-only	The multicast routing protocol via which this multicast forwarding entry was learned.
IP cIpMRouteRtAddress	1.3.6.1.4.1.9.10.117.1.1.2.1.14	InetAddress	read-only	The address portion of the route used to find the upstream or parent interface for this multicast forwarding entry.
ADR cIpMRouteRtMask	1.3.6.1.4.1.9.10.117.1.1.2.1.15	InetAddressPrefixLength	read-only	The mask associated with the route used to find the upstream or parent interface for this multicast forwarding entry.
IAN cIpMRouteRtProto	1.3.6.1.4.1.9.10.117.1.1.2.1.13	IANAipRouteProtocol	read-only	The routing mechanism via which the route used to find the upstream or parent interface for this multicast forwarding entry was learned. Inclusion of values for routing protocols is not intended to imply that those protocols need be supported.
INT cIpMRouteRtType	1.3.6.1.4.1.9.10.117.1.1.2.1.16	INTEGER	read-only	The reason the given route was placed in the (logical) multicast Routing Information Base (RIB). A value of unicast means that the route would normally be placed only in the unicast RIB, but was placed in the multicast RIB (instead or in addition) due to local configuration, such as when running PIM over RIP. A value of multicast means that the route was explicitly added to the multicast RIB by the routing protocol, such as Multiprotocol BGP or DVMRP.
IP cIpMRouteScopeNameAddress	1.3.6.1.4.1.9.10.117.1.1.6.1.2	InetAddress	not-accessible	The group address which when combined with the corresponding value of cIpMRouteScopeNameAddressMask identifies the group range associated with the multicast scope.
ADR cIpMRouteScopeNameAddressMask	1.3.6.1.4.1.9.10.117.1.1.6.1.3	InetAddressPrefixLength	not-accessible	The group address mask which when combined with the corresponding value of cIpMRouteScopeNameAddress identifies the group range associated with the multicast scope.
IPt cIpMRouteScopeNameAddressType	1.3.6.1.4.1.9.10.117.1.1.6.1.1	InetAddressType	not-accessible	The type of InetAddress representing cIpMRouteScopeNameAddress.
T/F cIpMRouteScopeNameDefault	1.3.6.1.4.1.9.10.117.1.1.6.1.6	TruthValue	read-create	If true, indicates a preference that the name in the following language should be used by applications if no name is available in a desired language.
cIpMRouteScopeNameEntry	1.3.6.1.4.1.9.10.117.1.1.6.1		not-accessible	An entry (conceptual row) in the cIpMRouteScopeNameTable representing a multicast scope name.
LAN cIpMRouteScopeNameLanguage	1.3.6.1.4.1.9.10.117.1.1.6.1.4	LanguageTag	not-accessible	The RFC 1766-style language tag associated with the scope name.
ROW cIpMRouteScopeNameStatus	1.3.6.1.4.1.9.10.117.1.1.6.1.7	RowStatus	read-create	The status of this row, by which new entries may be created, or old entries deleted from this table.
STR cIpMRouteScopeNameString	1.3.6.1.4.1.9.10.117.1.1.6.1.5	SnmpAdminString	read-create	The textual name associated with the multicast scope. The value of this object should be suitable for displaying to end-users, such as when allocating a multicast address in this scope.
cIpMRouteScopeNameTable	1.3.6.1.4.1.9.10.117.1.1.6		not-accessible	The (conceptual) table listing the multicast scope names.
IP cIpMRouteSource	1.3.6.1.4.1.9.10.117.1.1.2.1.3	InetAddress	not-accessible	The network address which when combined with the corresponding value of cIpMRouteSourceMask identifies the sources for which this entry contains multicast routing information. The address of 0:: indicates shared-tree entry.
ADR cIpMRouteSourceMask	1.3.6.1.4.1.9.10.117.1.1.2.1.4	InetAddressPrefixLength	not-accessible	The network mask which when combined with the corresponding value of cIpMRouteSource identifies the sources for which this entry contains multicast routing information.
cIpMRouteTable	1.3.6.1.4.1.9.10.117.1.1.2		not-accessible	The (conceptual) table containing multicast routing information for IP datagrams sent by particular sources to the IP multicast groups known to this router.
IP cIpMRouteUpstreamNeighbor	1.3.6.1.4.1.9.10.117.1.1.2.1.5	InetAddress	read-only	The address of the upstream neighbor (e.g., RPF neighbor) from which IP datagrams from these sources to this multicast address are received, or 0:: if the upstream neighbor is unknown.
TIK cIpMRouteUpTime	1.3.6.1.4.1.9.10.117.1.1.2.1.7	TimeTicks	read-only	The time since the multicast routing information represented by this entry was learned by the router.
ciscoIetfIpMRouteMIB	1.3.6.1.4.1.9.10.117			Address family independent MIB module for management IP Multicast routing, but independent of the specific multicast routing protocol in use. This MIB module is based on RFC 2932 with additional MIB objects to make it a address family independent MIB. This Cisco MIB was created due to non availability of RFC or an Internet Draft which can provide address family independent MIB for IP Multicast Routing. This MIB may later be deprecated with a stable RFC or an Internet Draft This MIB module contains two scalars and five tables. The tables are: (1) The IP Multicast Route Table containing multicast routing information for IP datagrams sent by particular sources to the IP multicast groups known to a router. (2) The IP Multicast Routing Next Hop Table containing information on the next-hops for the routing 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. (3) The IP Multicast Routing Interface Table containing multicast routing information specific to interfaces. (4) The IP Multicast Scope Boundary Table containing the boundaries configured for multicast scopes. (5) The IP Multicast Scope Name Table containing human-readable names of multicast scope.

RFC description

Address-family independent IP multicast routing management for multiple routing protocols.

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