DHCP-RELAY-MGMT-MIB

All MIBs › DHCP-RELAY-MGMT-MIB

Organization: D-Link Corp.

Last Updated: 2010-05-28

Category: Protocol: DHCP, Standard: IETF

Description: DHCP relay agent management MIB providing objects to configure relay policies, helper addresses, and monitor relay statistics.

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What Is DHCP-RELAY-MGMT-MIB?

This is a private enterprise MIB (vendor not identified in the available source) providing management objects for a DHCP relay agent running on a router or Layer 3 switch. It exposes relay policy configuration, configured DHCP helper/server addresses, and relay operation statistics. As a monitoring module its main value is confirming that the relay agent's software configuration is correctly forwarding DHCP requests to the intended helper addresses, and that relay statistics counters are incrementing as expected -- a stalled counter can indicate a broken relay path even though the device itself is otherwise up. It builds on standard DHCP/BOOTP relay concepts (as in RFC 2131/3046) implemented as a vendor-specific management extension. It is deployed on routers or Layer 3 switches that sit between DHCP clients and a centralized DHCP server across subnet boundaries, monitored via SNMP. Engineers can download the DHCP-RELAY-MGMT-MIB file directly to load it into their MIB browser.

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

D-Link Corp. router/Layer 3 switch (DHCP relay agent) — Identified as D-Link Corp. via the module's own ORGANIZATION field, not 'vendor not identified' as previously described.

Monitoring Examples

No specific object or table names were included in the source excerpt for this module; based on its description, an administrator would poll relay policy/helper-address configuration objects to confirm DHCP requests from a given VLAN or interface are being forwarded to the correct server address, and relay statistics counters to detect whether request/reply forwarding is actually occurring -- a helper address misconfiguration would typically show up as clients failing to obtain a lease while the relay statistics stay flat.

What Can Be Monitored

DHCP relay policy configuration
configured DHCP helper/server addresses
relay forwarding statistics/counters

Imported Objects

From DLINK-ID-REC-MIB

dlink-common-mgmt

From Q-BRIDGE-MIB

VlanId

From RFC1213-MIB

DisplayString

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
swDHCPRelayMIB	1.3.6.1.4.1.171.12.42			The structure of DHCP relay management for the proprietary enterprise.
swDHCPRelayCtrl	1.3.6.1.4.1.171.12.42.1
INT swDHCPRelayState	1.3.6.1.4.1.171.12.42.1.1	INTEGER	read-write	This object indicates whether the DHCP relay function is enabled or disabled.
INT swDHCPRelayHopCount	1.3.6.1.4.1.171.12.42.1.2	INTEGER	read-write	This object indicates the maximum number of router hops that the BOOTP packets can cross.
INT swDHCPRelayTimeThreshold	1.3.6.1.4.1.171.12.42.1.3	INTEGER	read-write	This object indicates the minimum time in seconds within which the switch must relay the DHCP request. If this time is exceeded, the switch will drop the DHCP packet.
swDHCPRelayInfo	1.3.6.1.4.1.171.12.42.2
swDHCPRelayMgmt	1.3.6.1.4.1.171.12.42.3
swDHCPRelayCtrlTable	1.3.6.1.4.1.171.12.42.3.1		not-accessible	This table indicates the IP address as a destination to forward (relay) DHCP packets to.
swDHCPRelayCtrlEntry	1.3.6.1.4.1.171.12.42.3.1.1		not-accessible	A list of information indicates the IP address as a destination to forward (relay) DHCP packets to.
STR swDHCPRelayCtrlInterfaceName	1.3.6.1.4.1.171.12.42.3.1.1.1	DisplayString	read-only	This object indicates the name of the IP interface.
IP swDHCPRelayCtrlServer	1.3.6.1.4.1.171.12.42.3.1.1.2	IpAddress	read-only	This object indicates the DHCP server IP address.
ROW swDHCPRelayCtrlRowStatus	1.3.6.1.4.1.171.12.42.3.1.1.3	RowStatus	read-create	This object indicates the status of this entry.
swDHCPRelayOption82	1.3.6.1.4.1.171.12.42.3.2
INT swDHCPRelayOption82State	1.3.6.1.4.1.171.12.42.3.2.1	INTEGER	read-write	This object indicates whether the DHCP relay option 82 function is enabled or disabled.
INT swDHCPRelayOption82CheckState	1.3.6.1.4.1.171.12.42.3.2.2	INTEGER	read-write	This object indicates whether the DHCP relay option 82 check function is enabled or disabled.
INT swDHCPRelayOption82Policy	1.3.6.1.4.1.171.12.42.3.2.3	INTEGER	read-write	This object indicates the DHCP relay option 82 policy.
INT swDHCPRelayOption82RemoteIDType	1.3.6.1.4.1.171.12.42.3.2.4	INTEGER	read-write	This object indicates the type of remote ID. If the type is default, the remote ID will be the MAC address of the device. Otherwise, the remote ID can be defined by writing to the swDHCPRelayOption82RemoteID object.
STR swDHCPRelayOption82RemoteID	1.3.6.1.4.1.171.12.42.3.2.5	DisplayString	read-write	This object displays the current remote ID of the device. If swDHCPRelayOption82RemoteIDType is set to default, the value will be the MAC address of the device, and this object cannot be modified. If swDHCPRelayOption82RemoteIDType is set to user-defined, a new value can be written to this object.
swDHCPRelayOption60	1.3.6.1.4.1.171.12.42.3.3
INT swDHCPRelayOption60State	1.3.6.1.4.1.171.12.42.3.3.1	INTEGER	read-write	This object indicates whether the DHCP relay option 60 function is enabled or disabled.
INT swDHCPRelayOption60DefMode	1.3.6.1.4.1.171.12.42.3.3.2	INTEGER	read-write	This object indicates default mode that has no option 60 matching rules. relay (1): means to relay the packet to the IP address which is specified by swDHCPRelayOption60DefRelayIp. drop (2): means to drop the packet.
swDHCPRelayOption60DefTable	1.3.6.1.4.1.171.12.42.3.3.3		not-accessible	This table indicates the default relay servers for the packet that has no option 60 matching rules.
swDHCPRelayOption60DefEntry	1.3.6.1.4.1.171.12.42.3.3.3.1		not-accessible	A list of information indicates the default relay servers for the packet that has no option 60 matching rules.
IP swDHCPRelayOption60DefRelayIp	1.3.6.1.4.1.171.12.42.3.3.3.1.1	IpAddress	read-only	This object indicates the IP address of the default relay server.
ROW swDHCPRelayOption60DefRowStatus	1.3.6.1.4.1.171.12.42.3.3.3.1.2	RowStatus	read-create	This object indicates the status of this entry.
swDHCPRelayOption60Table	1.3.6.1.4.1.171.12.42.3.3.4		not-accessible	This table indicates the relay servers for the packet for option 60 rules.
swDHCPRelayOption60Entry	1.3.6.1.4.1.171.12.42.3.3.4.1		not-accessible	A list of information indicates the relay servers for the packet for option 60 rules.
STR swDHCPRelayOption60String	1.3.6.1.4.1.171.12.42.3.3.4.1.1	DisplayString	read-only	This object indicates the string of this entry. Note that it is theoretically possible for a valid string to exceed the allowed length of an SNMP object identifier, and thus be impossible to represent in tables in this MIB that are indexed by string.
IP swDHCPRelayOption60RelayIp	1.3.6.1.4.1.171.12.42.3.3.4.1.2	IpAddress	read-only	This object indicates the IP address of the relay server.
INT swDHCPRelayOption60MatchType	1.3.6.1.4.1.171.12.42.3.3.4.1.3	INTEGER	read-create	This object indicates the match state of this entry. exact (1): Means the option 60 string in the packet must fully match the specified string. partial (2): Means the option 60 string in the packet only needs to partially match the specified string.
ROW swDHCPRelayOption60RowStatus	1.3.6.1.4.1.171.12.42.3.3.4.1.4	RowStatus	read-create	This object indicates the status of this entry.
swDHCPRelayOption61	1.3.6.1.4.1.171.12.42.3.4
INT swDHCPRelayOption61State	1.3.6.1.4.1.171.12.42.3.4.1	INTEGER	read-write	This object indicates whether the DHCP relay option 61 function is enabled or disabled.
INT swDHCPRelayOption61DefMode	1.3.6.1.4.1.171.12.42.3.4.2	INTEGER	read-write	This object indicates the default mode has no option 61 matching rules. relay (1): Means to relay the packet to the IP address which is specified by swDHCPRelayOption61DefRelayIp. drop (2): Means to drop the packet.
IP swDHCPRelayOption61DefRelayIp	1.3.6.1.4.1.171.12.42.3.4.3	IpAddress	read-write	This object indicates the IP address of the default relay server has no option 61 matching rules. Pay attention to when swDHCPRelayOption61Mode is: relay (1): This object must be set together. drop (2): This object can not be set, and it always returns to '0.0.0.0'.
swDHCPRelayOption61Table	1.3.6.1.4.1.171.12.42.3.4.4		not-accessible	This table indicates the relay servers for the packet for option 61 rules.
swDHCPRelayOption61Entry	1.3.6.1.4.1.171.12.42.3.4.4.1		not-accessible	A list of information indicates the relay servers for the packet for option 61 rules.
INT swDHCPRelayOption61ClientType	1.3.6.1.4.1.171.12.42.3.4.4.1.1	INTEGER	read-only	This object indicates the client type of this entry. mac (1): Means the client-ID which is the MAC address of a client. string (2): Means the client-ID which is specified string by an administrator.
STR swDHCPRelayOption61ClientID	1.3.6.1.4.1.171.12.42.3.4.4.1.2	DisplayString	read-only	This object indicates the string of this entry. Note: When the swDHCPRelayOption61ClientType is mac (1), the format of this object should be XX.XX.XX.XX.XX.XX (MAC address). When the swDHCPRelayOption61ClientType is string (2), it is theoretically possible for a valid string to exceed the allowed length of an SNMP object identifier, and thus be impossible to represent in tables in this MIB that are indexed by the string.
INT swDHCPRelayOption61Mode	1.3.6.1.4.1.171.12.42.3.4.4.1.3	INTEGER	read-create	This object indicates mode of this entry. relay (1): Means to relay the packet to the IP address which is specified by swDHCPRelayOption61RelayIp. drop (2): Means to drop the packet.
IP swDHCPRelayOption61RelayIp	1.3.6.1.4.1.171.12.42.3.4.4.1.4	IpAddress	read-create	This object indicates the IP address of the relay server. Pay attention to when swDHCPRelayOption61Mode is: relay (1): This object must be set together. drop (2): This object can not be set, and it always returns to '0.0.0.0'.
ROW swDHCPRelayOption61RowStatus	1.3.6.1.4.1.171.12.42.3.4.4.1.5	RowStatus	read-create	This object indicates the status of this entry.
swDHCPRelayVlanCtrlTable	1.3.6.1.4.1.171.12.42.3.5		not-accessible	This table indicates the IP address as a destination to forward (relay) DHCP packets to.
swDHCPRelayVlanCtrlEntry	1.3.6.1.4.1.171.12.42.3.5.1		not-accessible	A list of information indicates the IP address as a destination to forward (relay) DHCP packets to.
IP swDHCPRelayVlanCtrlServer	1.3.6.1.4.1.171.12.42.3.5.1.1	IpAddress	not-accessible	This object indicates the DHCP server IP address.
OCT swDHCPRelayVlanCtrlVlanRangeList1to64	1.3.6.1.4.1.171.12.42.3.5.1.2	OCTET STRING	read-create	This object indicates the VLAN range (1-512) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList65to128	1.3.6.1.4.1.171.12.42.3.5.1.3	OCTET STRING	read-create	This object indicates the VLAN range (513-1024) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList129to192	1.3.6.1.4.1.171.12.42.3.5.1.4	OCTET STRING	read-create	This object indicates the VLAN range (1025-1536) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList193to256	1.3.6.1.4.1.171.12.42.3.5.1.5	OCTET STRING	read-create	This object indicates the VLAN range (1537-2048) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList257to320	1.3.6.1.4.1.171.12.42.3.5.1.6	OCTET STRING	read-create	This object indicates the VLAN range (2049-2560) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList321to384	1.3.6.1.4.1.171.12.42.3.5.1.7	OCTET STRING	read-create	This object indicates the VLAN range (2561-3072) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList385to448	1.3.6.1.4.1.171.12.42.3.5.1.8	OCTET STRING	read-create	This object indicates the VLAN range (3073-3584) that added the specific server.
OCT swDHCPRelayVlanCtrlVlanRangeList449to512	1.3.6.1.4.1.171.12.42.3.5.1.9	OCTET STRING	read-create	This object indicates the VLAN range (3585-4096) that added the specific server.
ROW swDHCPRelayVlanCtrlRowStatus	1.3.6.1.4.1.171.12.42.3.5.1.10	RowStatus	read-create	This object indicates the status of this entry.
swDHCPLocalRelayMgmt	1.3.6.1.4.1.171.12.42.4
INT swDHCPLocalRelayGlobalState	1.3.6.1.4.1.171.12.42.4.1	INTEGER	read-write	This object indicates the state of the DHCP local relay function of the switch.
swDHCPLocalRelayVlanTable	1.3.6.1.4.1.171.12.42.4.2		not-accessible	This table is used to manage the DHCP local relay status for each VLAN.
swDHCPLocalRelayVlanEntry	1.3.6.1.4.1.171.12.42.4.2.1		not-accessible	This object lists the current VLANs in the switch and their corresponding DHCP local relay status.
VLA swDHCPLocalRelayVlanID	1.3.6.1.4.1.171.12.42.4.2.1.1	VlanId	not-accessible	This object indicates the VLAN ID.
INT swDHCPLocalRelayState	1.3.6.1.4.1.171.12.42.4.2.1.2	INTEGER	read-write	This object indicates the state of the DHCP relay function of the specified VLAN.

RFC description

Manages DHCP relay agent configuration including Option 82, server assignment, and per-VLAN relay settings.

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Download DHCP-RELAY-MGMT-MIB

What Is DHCP-RELAY-MGMT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description