BAS-IP-MIB

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Organization: Broadband Access Systems

Last Updated: 1998-10-07

Category: DOCSIS and Cable, IP and Core Protocols

Description: Covers IP address assignment, ARP table entries, and IP protocol settings on BAS broadband access systems.

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What Is BAS-IP-MIB?

BAS-IP-MIB is a vendor extension to the standard IP MIB for Broadband Access Systems equipment, tracking IP address assignment and addressing details per chassis, slot, interface, and logical port. It exposes an IP address table with entries for address, subnet mask, broadcast address, reassembly size limits, and per-entry row status, mirroring and extending the standard ipAddrTable concept. Its monitoring value is primarily configuration verification rather than hardware sensors: confirming an interface's assigned IP address, mask, and administrative status is correct, and catching stale or invalid rows via basIpAdEntStatus. It explicitly extends the standard IETF IP MIB's addressing objects with BAS-specific chassis/slot/port indexing. It is deployed by broadband access operators managing IP addressing across multi-slot BAS platforms. Engineers can download the BAS-IP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BAS-IP-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

BAS (Broadband Access Systems) chassis-based broadband access platform

Monitoring Examples

An operator would check basIpAddrTable/basIpAddrEntry fields such as basIpAdEntAddr, basIpAdEntNetMask, and basIpAdEntBcastAddr against the expected addressing plan for a given basIpAdEntChassis/basIpAdEntSlot/basIpAdEntLPort combination to catch a misconfigured interface. An unexpected basIpAdEntStatus value (e.g., not active) on an interface that should be in service would flag a provisioning or hardware fault on that slot.

What Can Be Monitored

assigned IP address
subnet mask
broadcast address
reassembly maximum size
address row status
chassis/slot/port IP mapping

Imported Objects

From BAS-MIB

BasCardClass
BasChassisId
BasInterfaceId
BasLogicalPortId
BasSlotId
basExtIp	OBJECT-IDENTITY

From IANAifType-MIB

IANAifType

From SNMPv2-SMI

IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
basIpMib	1.3.6.1.4.1.3493.2.3.1			This module defines extensions to the IP MIB objects for Broadband Access Systems.
basIp	1.3.6.1.4.1.3493.2.3.1.1
basIpAddrTable	1.3.6.1.4.1.3493.2.3.1.1.1		not-accessible	The table of addressing information relevant to this entity's IP addresses.
basIpAddrEntry	1.3.6.1.4.1.3493.2.3.1.1.1.1		not-accessible	The addressing information for one of this entity's IP addresses.
BAS basIpAdEntChassis	1.3.6.1.4.1.3493.2.3.1.1.1.1.1	BasChassisId	not-accessible	The BAS Chassis ID of the Route Server.
BAS basIpAdEntSlot	1.3.6.1.4.1.3493.2.3.1.1.1.1.2	BasSlotId	not-accessible	The BAS Slot ID of the Route Server.
NUM basIpAdEntIf	1.3.6.1.4.1.3493.2.3.1.1.1.1.3	BasInterfaceId	not-accessible	The BAS interface ID of the Route Server.
BAS basIpAdEntLPort	1.3.6.1.4.1.3493.2.3.1.1.1.1.4	BasLogicalPortId	not-accessible	The BAS logical port ID of the Route Server.
IP basIpAdEntAddr	1.3.6.1.4.1.3493.2.3.1.1.1.1.5	IpAddress	read-create	The IP address to which this entry's addressing information pertains.
INT basIpAdEntIfIndex	1.3.6.1.4.1.3493.2.3.1.1.1.1.6	INTEGER	read-create	The index value which uniquely identifies the interface to which this entry is applicable. The interface identified by a particular value of this index is the same interface as identified by the same value of RFC 1573's ifIndex.
IP basIpAdEntNetMask	1.3.6.1.4.1.3493.2.3.1.1.1.1.7	IpAddress	read-create	The subnet mask associated with the IP address of this entry. The value of the mask is an IP address with all the network bits set to 1 and all the hosts bits set to 0.
INT basIpAdEntBcastAddr	1.3.6.1.4.1.3493.2.3.1.1.1.1.8	INTEGER	read-create	The value of the least-significant bit in the IP broadcast address used for sending datagrams on the (logical) interface associated with the IP address of this entry. For example, when the Internet standard all-ones broadcast address is used, the value will be 1. This value applies to both the subnet and network broadcasts addresses used by the entity on this (logical) interface.
INT basIpAdEntReasmMaxSize	1.3.6.1.4.1.3493.2.3.1.1.1.1.9	INTEGER	read-only	The size of the largest IP datagram which this entity can re-assemble from incoming IP fragmented datagrams received on this interface.
ROW basIpAdEntStatus	1.3.6.1.4.1.3493.2.3.1.1.1.1.10	RowStatus	read-create	The row status object used to create and delete a conceptual row according to RowStatus conventions.
BAS basIpAdEntCardType	1.3.6.1.4.1.3493.2.3.1.1.1.1.11	BasCardClass	read-only	The card type inserted in a particular slot
INT basIpAdEntPriority	1.3.6.1.4.1.3493.2.3.1.1.1.1.12	INTEGER	read-write	IP address priority, 1 = primary, 2 and above secondary. Cannot be set to 0.

RFC description

Manages IP address assignment, ARP tables, and IP protocol parameters on BAS broadband access systems.

Start monitoring Broadband Access Systems (BAS) CMTS (legacy) 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 BAS-IP-MIB

What Is BAS-IP-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description