Unisphere-Data-DHCP-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsUnisphere-Data-DHCP-MIB

Organization: Unisphere Networks, Inc.

Last Updated: 2002-05-10

Category: Juniper Unisphere ERX Routing

Description: Manages Unisphere ERX DHCP relay and local server configuration, address pools, and lease tracking.

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What Is Unisphere-Data-DHCP-MIB?

Unisphere-Data-DHCP-MIB is the DHCP relay and local-server MIB for Unisphere Networks' ERX broadband edge routers (Unisphere was acquired by Juniper Networks, and this module is the historical basis for the later Juniper-DHCP-MIB). It exposes configuration for DHCP relay agent option-82 insertion (circuit ID, remote ID), a table of configured DHCP relay server addresses, and error counters for bad/unknown relay messages and gateway-address spoofing attempts, alongside proxy-client statistics such as unknown-server counts. This is a software/protocol-service monitoring MIB: it tracks the operational health of the router's DHCP relay and proxy service, letting an operator confirm relay servers are correctly provisioned and detect malformed or spoofed DHCP traffic at the network edge, rather than exposing any hardware sensors. It builds on standard DHCP concepts (RFC 2131, option-82/RFC 3046) but defines Unisphere-proprietary object identifiers. It was typically deployed by broadband/ISP operators on Unisphere ERX routers for subscriber DHCP relay at the network edge. Engineers can download the Unisphere-Data-DHCP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Unisphere-Data-DHCP-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

  • Unisphere Networks ERX broadband edge routers (later Juniper E-series)

Monitoring Examples

An operator would walk usdDhcpRelayServerTable/usdDhcpRelayServerEntry to confirm each configured usdDhcpRelayServerAddress has usdDhcpRelayServerRowStatus active, and monitor usdDhcpRelayBadMessages/usdDhcpRelayUnknownMessages for signs of malformed DHCP traffic reaching a relay interface. A rising usdDhcpRelayGatewayAddrSpoofs counter would flag spoofing attempts on subscriber ports, while usdDhcpProxyClientUnknownServers highlights DHCP proxy requests referencing servers the router doesn't recognize.

What Can Be Monitored

  • DHCP relay server address configuration
  • bad/unknown DHCP messages
  • gateway address spoofing counter
  • option-82 circuit/remote ID settings
  • proxy client unknown-server counter
Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

PhysAddress
RowStatus
TEXTUAL-CONVENTION
TimeInterval
TruthValue

From Unisphere-Data-MIBs

usDataMibsMODULE-IDENTITY

From Unisphere-Data-TC

UsdEnable

How to Use in IPNetwork Monitor

Example using usdDhcpRelayBadMessages OID:

Select an Unisphere Networks ERX broadband edge routers, later Juniper E-serie (DHCP relay option-82/error-counter status) 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 usdDhcpRelayBadMessages into the Find box to locate it in the OID tree, then select it and click OK. It reports the number of DHCP relay messages received by this agent, that were discarded because of apparent corruption. 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

RFC description

DHCP MIB for Unisphere Networks enterprise routing and access devices.

Start monitoring Unisphere Networks ERX broadband edge routers, later Juniper E-series (DHCP relay option-82/error-counter 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.

Download Unisphere-Data-DHCP-MIB