RAD-HDLC-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › RAD-HDLC-MIB

Description: RAD Data Communications HDLC serial interface MIB managing protocol type, clock source, loopback, and line-rate settings for V.35, X.21, and RS-530 WAN links

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 RAD-HDLC-MIB?

RAD-HDLC-MIB is a RAD Data Communications proprietary MIB configuring and monitoring HDLC (High-level Data Link Control) WAN interfaces. Its configuration table, keyed by interface, records protocol, rate resolution, TX clock source/polarity, terminal mode, loopback state, flow control, line rate, RX clock mode/polarity, and loss-of-frame flag, a current-status table records operational status, LOF, inbound/outbound frames, inbound errors, aborted frames, and length errors, and an interval table extends the same over historical windows. As a configuration/performance MIB it lets an administrator confirm HDLC line-rate/clocking settings and watch frame-error trends on a RAD Data Communications device. It is deployed on RAD Data Communications HDLC WAN access equipment. Engineers can download the RAD-HDLC-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in RAD-HDLC-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

  • RAD Data Communications HDLC WAN access equipment

Monitoring Examples

An administrator checks hdlcCurrentInErrors and hdlcCurrentAbortedFrames to diagnose a degraded HDLC WAN link on a RAD Data Communications device.

What Can Be Monitored

  • HDLC line configuration and frame-error statistics
Imported Objects

From IF-MIB

InterfaceIndex

From RAD-MIB

diverseIfWanGenOBJECT-IDENTITY
fileNameOBJECT-TYPE
radAtmOBJECT-IDENTITY
radRouterOBJECT-IDENTITY
radSysRtrEventsOBJECT-IDENTITY
rtrBridgeOBJECT-IDENTITY

From SNMPv2-SMI

Gauge32
Integer32
IpAddress
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using hdlcLOF OID:

Select a RAD Data Communications HDLC WAN access equipment 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 hdlcLOF 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. It reports the total number of seconds the port is in Loss Of Frame state. 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 Gauge32-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

RFC description

RAD HDLC protocol configuration for V35, X21, and RS530 WAN interfaces.

Start monitoring RAD Data Communications HDLC WAN access equipment 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 RAD-HDLC-MIB