CTRON-DECIV-ROUTER-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsCTRON-DECIV-ROUTER-MIB

Category: Routing Protocols, SNA and Legacy Protocols, Vendor: Cabletron/Enterasys

Description: Manages Cabletron DECnet IV routing protocol configuration, routing tables, and adjacency status.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

What Is CTRON-DECIV-ROUTER-MIB?

CTRON-DECIV-ROUTER-MIB is a Cabletron Systems private MIB for managing DECnet Phase IV routing protocol configuration and status on Cabletron routers/multiprotocol switches. It exposes objects covering router identity, node type, adjacency and routing limits (max nodes, max broadcast/level routing area entries, max hops, max cost, max visits), and timer configuration for broadcast and non-broadcast circuits. As a routing-protocol configuration MIB it is used mainly to confirm the software-level DECnet routing setup and scaling limits are correctly applied on a router, rather than to expose hardware sensors, though hitting configured limits (e.g., max nodes or max hops) can reveal a network that has outgrown its configured DECnet routing parameters. It is specific to the legacy DECnet Phase IV protocol and has no dependency on modern IETF routing MIBs like OSPF-MIB or BGP4-MIB. It would be encountered only when managing legacy Cabletron network equipment still running DECnet Phase IV in older DEC-centric network environments, where administrators can download the CTRON-DECIV-ROUTER-MIB file to load into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CTRON-DECIV-ROUTER-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

  • Cabletron router/multiprotocol switch (legacy DECnet Phase IV)

Monitoring Examples

An administrator can check nwDecIVSysRouterId and nwDecIVNodeType to confirm a router's DECnet identity and role (Level 1 or Level 2 router). Reviewing nwDecIVMaxNodes, nwDecIVMaxHops, and nwDecIVMaxCost against actual network size helps determine whether the DECnet area has grown beyond its configured routing limits, which would explain unreachable distant nodes; nwDecIVBroadcastTimer and nwDecIVNonBroadcastTimer settings help diagnose slow adjacency formation on broadcast versus point-to-point circuits.

What Can Be Monitored

  • DECnet router ID and node type
  • max nodes/hops/cost routing limits
  • broadcast and non-broadcast timer settings
  • adjacency/area configuration limits
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
Gauge
TimeTicks

From RFC1213-MIB

DisplayString

From ROUTER-OIDS

nwRtrProtoSuitesOBJECT-IDENTITY
OIDs

RFC description

Cabletron DECnet Phase IV router MIB defining routing services, forwarding, and network topology management.

Start monitoring Cabletron router/multiprotocol switch (legacy DECnet Phase IV) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download CTRON-DECIV-ROUTER-MIB