ALTIGA-DHCP-STATS-MIB

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Category: VPN and Security, Vendor: Altiga

Description: Altiga (Cisco VPN 3000) DHCP client statistics MIB for monitoring DHCP relay and client address acquisition events.

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What Is ALTIGA-DHCP-STATS-MIB?

ALTIGA-DHCP-STATS-MIB comes from Altiga Networks, whose remote-access VPN gateway was acquired by Cisco and became the Cisco VPN 3000 Concentrator; it tracks DHCP client/relay statistics used when the concentrator hands out addresses to VPN clients. It exposes performance-counter data: active vs. maximum lease counts and detailed counts of DHCP discover/offer/request/ack/nak messages at each stage (init, T1 renewal, T2 rebinding). Its monitoring value is operational/software health of the address-assignment process - a lease pool nearing exhaustion or a rising rate of NAK responses signals that new or renewing VPN clients may be unable to obtain an address. It is a standalone Altiga-proprietary MIB rather than a reuse of the IETF DHCP-related MIBs. It is deployed on Cisco VPN 3000 Concentrators (or original Altiga gateways) providing DHCP-assigned addressing for remote-access VPN clients. Engineers can download the ALTIGA-DHCP-STATS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ALTIGA-DHCP-STATS-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

Cisco VPN 3000 Series Concentrator (formerly Altiga Networks)

Monitoring Examples

Comparing alDhcpStatsActiveLeases against alDhcpStatsMaximumLeases shows how close the DHCP pool is to exhaustion, which would block new VPN client connections once reached. alDhcpStatsDiscoversSent versus alDhcpStatsOffersRcvd shows whether offers are keeping pace with discovers, while a rising alDhcpStatsInitNaksRcvd or alDhcpStatsT1NaksRcvd count indicates clients are being rejected during initial address acquisition or renewal.

What Can Be Monitored

active vs. maximum DHCP leases
DHCP discover/offer message counts
init/T1/T2 request-ack-nak counters
DHCP address renewal failure rate

Imported Objects

From ALTIGA-GLOBAL-REG

alDhcpMibModule

OBJECT-IDENTITY

From ALTIGA-MIB

alDhcpGroup	OBJECT-IDENTITY
alStatsDhcp	OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Gauge
IpAddress

From SNMPv2-TC-v1

DisplayString
RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
altigaDhcpStatsMibModule	1.3.6.1.4.1.3076.1.1.25.2
altigaDhcpStatsMibConformance	1.3.6.1.4.1.3076.1.1.25.2.1
altigaDhcpStatsMibCompliances	1.3.6.1.4.1.3076.1.1.25.2.1.1
altigaDhcpStatsMibCompliance	1.3.6.1.4.1.3076.1.1.25.2.1.1.1
altigaDhcpStatsGroup	1.3.6.1.4.1.3076.2.1.1.1.20.2
alStatsDhcpGlobal	1.3.6.1.4.1.3076.2.1.2.20.1
GAU alDhcpStatsActiveLeases	1.3.6.1.4.1.3076.2.1.2.20.1.1	Gauge	read-only	The number of active DHCP leases.
GAU alDhcpStatsMaximumLeases	1.3.6.1.4.1.3076.2.1.2.20.1.2	Gauge	read-only	The number of leases that were active at any one time.
GAU alDhcpStatsDiscoversSent	1.3.6.1.4.1.3076.2.1.2.20.1.3	Gauge	read-only	The number of transmitted DHCPDISCOVER messages.
GAU alDhcpStatsOffersRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.4	Gauge	read-only	The number of received DHCPOFFER messages.
GAU alDhcpStatsInitRequestsSent	1.3.6.1.4.1.3076.2.1.2.20.1.5	Gauge	read-only	The number of initially (i.e. in the SELECTING or REQUESTING state) transmitted DHCPREQUEST messages.
GAU alDhcpStatsT1RequestsSent	1.3.6.1.4.1.3076.2.1.2.20.1.6	Gauge	read-only	The number of transmitted DHCPDISCOVER messages after the T1 timer expired.
GAU alDhcpStatsT2RequestsSent	1.3.6.1.4.1.3076.2.1.2.20.1.7	Gauge	read-only	The number of transmitted DHCPDISCOVER messages after the T2 timer expired.
GAU alDhcpStatsInitAcksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.8	Gauge	read-only	The number of received original (i.e. in the REQUESTING state) DHCPACK messages.
GAU alDhcpStatsInitNaksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.9	Gauge	read-only	The number of received original (i.e. in the REQUESTING state) DHCPNAK messages.
GAU alDhcpStatsT1AcksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.10	Gauge	read-only	The number of received DHCPACK messages after the T1 timer expired.
GAU alDhcpStatsT1NaksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.11	Gauge	read-only	The number of received DHCPNAK messages after the T1 timer expired.
GAU alDhcpStatsT2AcksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.12	Gauge	read-only	The number of received DHCPACK messages after the T2 timer expired.
GAU alDhcpStatsT2NaksRcvd	1.3.6.1.4.1.3076.2.1.2.20.1.13	Gauge	read-only	The number of received DHCPNAK messages after the T2 timer expired.
GAU alDhcpStatsT1Timeouts	1.3.6.1.4.1.3076.2.1.2.20.1.14	Gauge	read-only	The number of T1 timeouts that occurred.
GAU alDhcpStatsT2Timeouts	1.3.6.1.4.1.3076.2.1.2.20.1.15	Gauge	read-only	The number of T2 timeouts that occurred.
GAU alDhcpStatsApiRequests	1.3.6.1.4.1.3076.2.1.2.20.1.16	Gauge	read-only	The number of requests made to obtain an IP address from the DHCP module.
GAU alDhcpStatsLeaseTimeouts	1.3.6.1.4.1.3076.2.1.2.20.1.17	Gauge	read-only	The number of leases that expired.
alDhcpStatsSessTable	1.3.6.1.4.1.3076.2.1.2.20.2		not-accessible	List of active sessions.
alDhcpStatsSessEntry	1.3.6.1.4.1.3076.2.1.2.20.2.1		not-accessible	An entry in the alDhcpStatsSessTable.
ROW alDhcpStatsSessRowStatus	1.3.6.1.4.1.3076.2.1.2.20.2.1.1	RowStatus	read-write	The status of this row. This can be used to delete the lease, but can not be used to create one.
INT alDhcpStatsSessId	1.3.6.1.4.1.3076.2.1.2.20.2.1.2	INTEGER	read-only	The unique DHCP session ID used as the index for this row.
INT alDhcpStatsSessKey	1.3.6.1.4.1.3076.2.1.2.20.2.1.3	INTEGER	read-only	The DHCP hash key for this lease.
IP alDhcpStatsSessIpAddr	1.3.6.1.4.1.3076.2.1.2.20.2.1.4	IpAddress	read-only	The IP address of the remote client.
INT alDhcpStatsSessUpTime	1.3.6.1.4.1.3076.2.1.2.20.2.1.5	INTEGER	read-only	The total length of time that this session has had active lease(s).
INT alDhcpStatsSessLeaseDuration	1.3.6.1.4.1.3076.2.1.2.20.2.1.6	INTEGER	read-only	The duration of the current lease.
INT alDhcpStatsSessLeaseExpire	1.3.6.1.4.1.3076.2.1.2.20.2.1.7	INTEGER	read-only	The remaining seconds until the current lease expires.
STR alDhcpStatsSessState	1.3.6.1.4.1.3076.2.1.2.20.2.1.8	DisplayString	read-only	The state of this session.
STR alDhcpStatsSessClientId	1.3.6.1.4.1.3076.2.1.2.20.2.1.9	DisplayString	read-only	The full 'client ID' value associated with this lease.
IP alDhcpStatsSessSrvrIpAddr	1.3.6.1.4.1.3076.2.1.2.20.2.1.10	IpAddress	read-only	The IP address of the server from which this lease was obtained.

RFC description

Cisco Altiga DHCP Statistics MIB for monitoring DHCP lease counters and protocol message statistics.

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Download ALTIGA-DHCP-STATS-MIB

What Is ALTIGA-DHCP-STATS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description