TN-DHCP-RELAY-MIB

All MIBs › TN-DHCP-RELAY-MIB

Organization: Transition Networks, Inc.

Last Updated: 2015-04-20

Category: DHCP, Transition Networks Media Converters

Description: Manages Transition Networks DHCP relay agent forwarding configuration and server bindings.

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What Is TN-DHCP-RELAY-MIB?

TN-DHCP-RELAY-MIB is a Transition Networks enterprise MIB for configuring and monitoring the DHCP relay agent function on its managed switches, which forwards DHCP client requests to a configured DHCP server across subnet boundaries. It exposes global relay configuration (server IP address, relay mode, DHCP Option 82 information-insertion mode and policy) alongside statistics counters for packets successfully relayed and various error conditions on both the client and server sides. Its monitoring value is centered on DHCP service health and configuration correctness: rising counters like tnDhcpRelayStatusStatisticsServerPacketErrors, tnDhcpRelayStatusStatisticsClientPacketErrors, tnDhcpRelayStatusStatisticsBadCircuitId, or tnDhcpRelayStatusStatisticsMissingCircuitId/tnDhcpRelayStatusStatisticsMissingAgentOption indicate a DHCP relay misconfiguration or a malfunctioning downstream device sending malformed Option 82 data, which would otherwise cause clients to fail to obtain an IP address. It builds on the standard DHCP relay/Option 82 concepts defined in IETF RFCs (e.g. RFC 3046) though it is implemented as a vendor-specific MIB rather than importing a standard DHCP MIB. It is deployed on Transition Networks managed Ethernet switches acting as DHCP relay agents at the network edge, and administrators can download the TN-DHCP-RELAY-MIB file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in TN-DHCP-RELAY-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

Transition Networks managed Ethernet switches

Monitoring Examples

An administrator would poll tnDhcpRelayConfigGlobalsServerIpAddress and tnDhcpRelayConfigGlobalsMode to confirm the relay agent is pointed at the correct DHCP server and enabled, then watch tnDhcpRelayStatusStatisticsClientPacketsRelayed versus tnDhcpRelayStatusStatisticsClientPacketErrors to spot a rising error rate. tnDhcpRelayStatusStatisticsBadCircuitId and tnDhcpRelayStatusStatisticsMissingCircuitId climbing over time would point to an Option 82 information-insertion problem, such as a misconfigured tnDhcpRelayConfigGlobalsInformationPolicy, that is preventing clients on certain ports from being correctly identified to the DHCP server.

What Can Be Monitored

DHCP server IP configuration
relay mode enable status
packets relayed (client/server)
relay/Option 82 error counts
circuit ID/agent option errors

Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

IpAddress
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

From TRANSITION-SMI

tnProducts

OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
tnDhcpRelayMib	1.3.6.1.4.1.868.2.5.148			The mib module for DHCP settings.
tnDhcpRelayMibObjects	1.3.6.1.4.1.868.2.5.148.1
tnDhcpRelayConfig	1.3.6.1.4.1.868.2.5.148.1.2
tnDhcpRelayConfigGlobals	1.3.6.1.4.1.868.2.5.148.1.2.1
T/F tnDhcpRelayConfigGlobalsMode	1.3.6.1.4.1.868.2.5.148.1.2.1.1	TruthValue	read-write	Global mode of DHCP relay. true is to enable DHCP relay and false is to disable it.
IP tnDhcpRelayConfigGlobalsServerIpAddress	1.3.6.1.4.1.868.2.5.148.1.2.1.2	IpAddress	read-write	Server IP address. This IP address is for DHCP server where the DHCP relay will relay DHCP packets to.
T/F tnDhcpRelayConfigGlobalsInformationMode	1.3.6.1.4.1.868.2.5.148.1.2.1.3	TruthValue	read-write	Indicates the DHCP relay information mode option operation. Possible modes are - Enabled: Enable DHCP relay information mode operation. When DHCP relay information mode operation is enabled, the agent inserts specific information (option 82) into a DHCP message when forwarding to DHCP server and removes it from a DHCP message when transferring to DHCP client. It only works when DHCP relay operation mode is enabled. Disabled: Disable DHCP relay information mode operation.
TND tnDhcpRelayConfigGlobalsInformationPolicy	1.3.6.1.4.1.868.2.5.148.1.2.1.4	TNDhcpRelayInformationPolicyType	read-write	Indicates the DHCP relay information option policy. When DHCP relay information mode operation is enabled, if the agent receives a DHCP message that already contains relay agent information it will enforce the policy. The 'Replace' policy is invalid when relay information mode is disabled.
tnDhcpRelayStatus	1.3.6.1.4.1.868.2.5.148.1.3
tnDhcpRelayStatusStatistics	1.3.6.1.4.1.868.2.5.148.1.3.1
U32 tnDhcpRelayStatusStatisticsServerPacketsRelayed	1.3.6.1.4.1.868.2.5.148.1.3.1.1	Unsigned32	read-only	Packets relayed from server to client.
U32 tnDhcpRelayStatusStatisticsServerPacketErrors	1.3.6.1.4.1.868.2.5.148.1.3.1.2	Unsigned32	read-only	Errors sending packets to servers.
U32 tnDhcpRelayStatusStatisticsClientPacketsRelayed	1.3.6.1.4.1.868.2.5.148.1.3.1.3	Unsigned32	read-only	Packets relayed from client to server.
U32 tnDhcpRelayStatusStatisticsClientPacketErrors	1.3.6.1.4.1.868.2.5.148.1.3.1.4	Unsigned32	read-only	Errors sending packets to clients.
U32 tnDhcpRelayStatusStatisticsAgentOptionErrors	1.3.6.1.4.1.868.2.5.148.1.3.1.5	Unsigned32	read-only	Number of packets forwarded without agent options because there was no room.
U32 tnDhcpRelayStatusStatisticsMissingAgentOption	1.3.6.1.4.1.868.2.5.148.1.3.1.6	Unsigned32	read-only	Number of packets dropped because no RAI option matching our ID was found.
U32 tnDhcpRelayStatusStatisticsBadCircuitId	1.3.6.1.4.1.868.2.5.148.1.3.1.7	Unsigned32	read-only	Circuit ID option in matching RAI option did not match any known circuit ID.
U32 tnDhcpRelayStatusStatisticsMissingCircuitId	1.3.6.1.4.1.868.2.5.148.1.3.1.8	Unsigned32	read-only	Circuit ID option in matching RAI option was missing.
U32 tnDhcpRelayStatusStatisticsBadRemoteId	1.3.6.1.4.1.868.2.5.148.1.3.1.9	Unsigned32	read-only	Remote ID option in matching RAI option did not match any known remote ID.
U32 tnDhcpRelayStatusStatisticsMissingRemoteId	1.3.6.1.4.1.868.2.5.148.1.3.1.10	Unsigned32	read-only	Remote ID option in matching RAI option was missing.
U32 tnDhcpRelayStatusStatisticsReceiveServerPackets	1.3.6.1.4.1.868.2.5.148.1.3.1.11	Unsigned32	read-only	Receive DHCP message from server.
U32 tnDhcpRelayStatusStatisticsReceiveClientPackets	1.3.6.1.4.1.868.2.5.148.1.3.1.12	Unsigned32	read-only	Receive DHCP message from client.
U32 tnDhcpRelayStatusStatisticsReceiveClientAgentOption	1.3.6.1.4.1.868.2.5.148.1.3.1.13	Unsigned32	read-only	Receive relay agent information option from client.
U32 tnDhcpRelayStatusStatisticsReplaceAgentOption	1.3.6.1.4.1.868.2.5.148.1.3.1.14	Unsigned32	read-only	Replace relay agent information option.
U32 tnDhcpRelayStatusStatisticsKeepAgentOption	1.3.6.1.4.1.868.2.5.148.1.3.1.15	Unsigned32	read-only	Keep relay agent information option.
U32 tnDhcpRelayStatusStatisticsDropAgentOption	1.3.6.1.4.1.868.2.5.148.1.3.1.16	Unsigned32	read-only	Drop relay agent information option.
tnDhcpRelayControl	1.3.6.1.4.1.868.2.5.148.1.4
T/F tnDhcpRelayControlClearStatistics	1.3.6.1.4.1.868.2.5.148.1.4.1	TruthValue	read-write	The action to clear statistics. true is to clear the statistics data. false, then, does nothing.
tnDhcpRelayMibConformance	1.3.6.1.4.1.868.2.5.148.2
tnDhcpRelayMibCompliances	1.3.6.1.4.1.868.2.5.148.2.1
tnDhcpRelayMibCompliance	1.3.6.1.4.1.868.2.5.148.2.1.1			The compliance statement for the implementation.
tnDhcpRelayMibGroups	1.3.6.1.4.1.868.2.5.148.2.2
tnDhcpRelayConfigGlobalsInfoGroup	1.3.6.1.4.1.868.2.5.148.2.2.1			A collection of objects suitable for bulk operations.
tnDhcpRelayStatusStatisticsInfoGroup	1.3.6.1.4.1.868.2.5.148.2.2.2			A collection of objects suitable for bulk operations.
tnDhcpRelayControlInfoGroup	1.3.6.1.4.1.868.2.5.148.2.2.3			A collection of objects suitable for bulk operations.

RFC description

Configures and monitors DHCP relay operations including relay mode, server address, and DHCP Option 82 handling policies.

Start monitoring Transition Networks managed Ethernet switches (DHCP relay/Option 82 config and 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 TN-DHCP-RELAY-MIB

What Is TN-DHCP-RELAY-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description