CISCO-P2P-IF-MIB

All MIBs › CISCO-P2P-IF-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2008-08-12

Category: Cisco Devices, IP and Core Protocols, Network Interfaces

Description: Manages point-to-point interfaces including configuration and operational status for serial and leased-line connections.

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What Is CISCO-P2P-IF-MIB?

CISCO-P2P-IF-MIB manages generic point-to-point network interfaces on Cisco devices -- serial links or SONET/SDH-like circuits -- running PPP, HDLC, or Cisco's cHDLC framing. It exposes configuration objects (CRC mode, scrambling mode, transmit delay) per interface as well as statistics objects capturing frame-level errors. It directly supports hardware/link-health monitoring: cp2pIfStatsInCrcErrors and related statistics reveal physical-layer or framing problems on a serial/point-to-point link, while configuration objects confirm the interface is set up with the expected CRC/scrambling mode. It works alongside the standard IF-MIB (ifTable) for base interface identity and counters, extending it with PPP/HDLC/cHDLC-specific detail. It is deployed on Cisco routers with serial or SONET/SDH interfaces using PPP, HDLC, or cHDLC encapsulation, common in WAN edge and leased-line connectivity. Engineers can download the CISCO-P2P-IF-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-P2P-IF-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 with serial/SONET-SDH point-to-point interface (PPP/HDLC/cHDLC)

Monitoring Examples

cp2pIfCfgTable/cp2pIfCfgEntry rows expose cp2pIfCfgCrcMode, cp2pIfCfgScramblingMode, and cp2pIfCfgTransmitDelay so an administrator can confirm a serial/point-to-point interface's framing configuration matches the far end. The companion cp2pIfStatsTable/cp2pIfStatsEntry provides cp2pIfStatsInCrcErrors, and a rising counter here on an otherwise-up interface points to a physical-layer or clocking problem on the link. Comparing CRC mode settings against the error counters helps isolate whether a mismatch in cp2pIfCfgCrcMode is causing the errors.

What Can Be Monitored

CRC error count
CRC mode configuration
scrambling mode configuration
transmit delay setting

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using cp2pIfStatsInCrcErrors OID:

Select a Cisco router with serial/SONET-SDH point-to-point interface 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 cp2pIfStatsInCrcErrors 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 accumulated number of CRC errors that are detected on the received packets via the Point to Point interface since system startup. 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 between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoP2PIfMIB	1.3.6.1.4.1.9.9.668			The Point to Point Interface MIB module. This MIB manages the generic objects for Serial link or SONET/SDH like point to point network interfaces with the encapsulations of PPP (Point to Point Protocol), HDLC (High Level Data Link Control) or cHDLC (CIsco extension to High Level Data Link Control) framing. Acronyms and terms: FCS - Frame Check Sequence. The frame check sequence is used to ensure that the data received is actually the data sent. CRC - Cyclic Redundancy Check. The transmitting system processes the frame check sequence portion of the frame through an algorithm called a CRC (Cyclic Redundancy Check). One of the usages of CRC is in the following PPP/HLDC over SONET/SDH example. +----+ \| PPP\| FCS Bit SONET/SDH \|HDLC\|=> Generation => Stuffing => Scrambling => Framing +----+ CRC 16,32
ciscoP2PIfMIBNotifs	1.3.6.1.4.1.9.9.668.0
ciscoP2PIfMIBObjects	1.3.6.1.4.1.9.9.668.1
cp2pIfGeneralObjects	1.3.6.1.4.1.9.9.668.1.1
cp2pIfCfgTable	1.3.6.1.4.1.9.9.668.1.1.1		not-accessible	The Point to Point generic Configuration Table. It contains the standard configuration information of the Point to Point interface.
cp2pIfCfgEntry	1.3.6.1.4.1.9.9.668.1.1.1.1		not-accessible	An entry in the configuration table for each Point to Point interface. The entry is created when the Point to Point related interface is created in ifTable. The possible ifType of point to point interface are listed as follows: [1] ppp(23) [2] hdlc(118) [3] propPointToPointSerial(22)
CP2 cp2pIfCfgCrcMode	1.3.6.1.4.1.9.9.668.1.1.1.1.1	Cp2pIfCrcMode	read-write	Specifies the CRC mode for the FCS generation of a packet sending via the Point to point interface.
CP2 cp2pIfCfgScramblingMode	1.3.6.1.4.1.9.9.668.1.1.1.1.2	Cp2pIfScramblingMode	read-write	Specifies the scrambling encryption mode of the point to point interface.
U32 cp2pIfCfgTransmitDelay	1.3.6.1.4.1.9.9.668.1.1.1.1.3	Unsigned32	read-write	Specified the minimum delay after sending a packet via the point to point interface. The value of '0' indicates the transmit delay of packet is disabled.
cp2pIfStatsTable	1.3.6.1.4.1.9.9.668.1.1.2		not-accessible	The Point to Point Interface Statistics Table. It contains statistics information of a Point to Point interface including the error statistics.
cp2pIfStatsEntry	1.3.6.1.4.1.9.9.668.1.1.2.1		not-accessible	An entry in the statistics table for each Point to Point interface.
C32 cp2pIfStatsInCrcErrorsEx	1.3.6.1.4.1.9.9.668.1.1.2.1.1	Counter32	read-only	Accumulated number of CRC errors that are detected on the received packets via the Point to Point interface since system startup.
ciscoP2PIfMIBConformance	1.3.6.1.4.1.9.9.668.3
ciscoP2PIfMIBCompliances	1.3.6.1.4.1.9.9.668.3.1
ciscoP2PIfMIBCompliance	1.3.6.1.4.1.9.9.668.3.1.1			The compliance statement for entities which implement the Cisco Point to Point interface MIB
ciscoP2PIfMIBGroups	1.3.6.1.4.1.9.9.668.3.2
ciscoP2PIfMIBGeneralGroup	1.3.6.1.4.1.9.9.668.3.2.1			The collection of objects providing general information about the Cisco Point to Point interfaces.

RFC description

Cisco point-to-point interface management for serial links, SONET/SDH with PPP, HDLC, and cHDLC encapsulation.

Start monitoring Cisco router with serial/SONET-SDH point-to-point interface 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 CISCO-P2P-IF-MIB