A3COM-DVMRP-R1-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsA3COM-DVMRP-R1-MIB

Category: Routing Protocols, Vendor: 3Com

Description: Manages Distance Vector Multicast Routing Protocol (DVMRP) routing tables and interface statistics on 3Com devices.

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What Is A3COM-DVMRP-R1-MIB?

A3COM-DVMRP-R1-MIB is a vendor-specific SNMP module from 3Com covering the Distance Vector Multicast Routing Protocol (DVMRP) implementation on 3Com/H3C routing switches and brouters. It exposes multicast routing configuration and state such as prune timers, cache aging, boundary addresses, MOSPF policy interaction, and per-port and per-neighbor DVMRP tables. Rather than hardware sensors, this MIB is used to monitor the software/protocol status of the multicast routing process itself, letting an operator confirm that DVMRP neighbors, ports, and cache entries are active and updating on schedule. It is layered on the vendor's private brouterMIB tree and assumes the base IP multicast routing model, so it is typically read alongside standard IP-MIB and multicast MIBs rather than standalone. It is used in legacy 3Com/H3C enterprise campus and WAN routing deployments that still run DVMRP for IP multicast distribution, and administrators maintaining such gear can find an A3COM-DVMRP-R1-MIB download available to load into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-DVMRP-R1-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

  • 3Com/H3C multicast-capable routers and brouters

Monitoring Examples

An operator would poll a3ComDvmrpPortTable/a3ComDvmrpPortEntry to confirm which interfaces are DVMRP-enabled and check a3ComDvmrpNeighborTable to verify expected upstream/downstream neighbor adjacencies are still present. Watching a3ComDvmrpCacheTime and a3ComDvmrpUpdateTime against configured a3ComDvmrpPrune behavior can reveal a multicast forwarding cache that is aging out too quickly or a neighbor relationship that has silently dropped. The a3ComDvmrpBoundaryAddrTable is checked to ensure administrative multicast boundaries are correctly scoping traffic.

What Can Be Monitored

  • DVMRP neighbor adjacency status
  • multicast route cache aging
  • prune state per group
  • DVMRP-enabled port list
  • administrative multicast boundaries
  • MOSPF policy interaction
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

IpAddress
enterprises

From RFC1213-MIB

PhysAddress
OIDs

RFC description

Distance Vector Multicast Routing Protocol configuration for 3Com bridge routers.

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Download A3COM-DVMRP-R1-MIB