All MIBs › JUNIPER-JDHCP-MIB
Organization: Juniper Networks, Inc.
Last Updated: 2015-03-03
Category: Protocol: DHCP, Vendor: Juniper
Description: Provides managed objects for the Juniper Networks JDHCP local DHCP server, supporting pool allocation and lease management.
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What Is JUNIPER-JDHCP-MIB?
JUNIPER-JDHCP-MIB is a Juniper Networks enterprise MIB for the JDHCP local DHCP server component of JUNOS, the operating system running on Juniper routers and switches. It exposes counters and objects related to local DHCP server operation and DHCP relay behavior, focusing on address pool allocation, lease handling, and packet-level error/drop conditions. It is primarily a fault and performance monitoring module: rather than exposing hardware sensors, it tracks software-level health of the DHCP service by counting dropped requests due to bad hardware addresses, malformed BOOTP opcodes, bad options, missing addresses, or missing routing instances, letting an operator infer service degradation or misconfiguration. As a Juniper enterprise MIB it typically complements the standard IETF DHCP-related MIBs and Juniper's own interface and chassis MIBs rather than replacing them. It is deployed on Juniper routers, switches, and security appliances running JUNOS that are configured as local DHCP servers or DHCP relay agents for subscriber or branch-office address assignment. Network engineers evaluating or troubleshooting this functionality can download the JUNIPER-JDHCP-MIB file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in JUNIPER-JDHCP-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
- Juniper router
- Juniper switch
- JUNOS-based network device
Monitoring Examples
An administrator would poll jnxJdhcpLocalServerStatistics objects such as jnxJdhcpLocalServerTotalDropped alongside the more specific drop counters like jnxJdhcpLocalServerBadHardwareDropped, jnxJdhcpLocalServerNoAddressDropped, and jnxJdhcpLocalServerNoRoutingInstanceDropped. A steady rise in jnxJdhcpLocalServerNoAddressDropped would reveal that the configured address pool is exhausted, while growth in jnxJdhcpLocalServerBadOptionsDropped could indicate misbehaving client devices sending malformed DHCP option fields. jnxJdhcpRelayObjects would be checked in parallel when the router is acting as a relay rather than a full local server.
What Can Be Monitored
- total dropped DHCP requests
- drops due to bad hardware address
- drops due to bad BOOTP opcode
- drops due to bad DHCP options
- drops due to address pool exhaustion
- drops due to missing routing instance
Imported Objects
From IF-MIB
| InterfaceIndex | |
| ifIndex | OBJECT-TYPE |
From JUNIPER-SMI
| jnxJdhcpMibRoot | OBJECT-IDENTITY |
From SNMPv2-SMI
| Counter32 | |
| IpAddress | |
| MODULE-IDENTITY | |
| NOTIFICATION-TYPE | |
| OBJECT-TYPE | |
| Unsigned32 |
From SNMPv2-TC
| DateAndTime | |
| DisplayString | |
| MacAddress | |
| TEXTUAL-CONVENTION |
How to Use in IPNetwork Monitor
Example using jnxJdhcpLocalServerTotalDropped OID:
OIDs
RFC description
Monitors DHCP local server and relay statistics on Juniper JUNOS network platforms.
Start monitoring Juniper router/switch, JUNOS (local DHCP server/relay) 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.