NMS-NAT

All MIBs › NMS-NAT

Last Updated: 2003-10-25

Category: IP Addressing

Description: Manages NMS Communications Network Address Translation rules, mapping tables, and session statistics.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock 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.

What Is NMS-NAT?

NMS-NAT is a vendor-specific MIB from NMS Communications that manages Network Address Translation functionality on its network devices, covering NAT rule definitions, address/port mapping tables, and translation session statistics. It exposes configuration data (NAT rules and mappings) as well as operational/performance data (active session counts and translation statistics). While primarily a configuration and traffic-management MIB, it supports software status monitoring by letting administrators confirm NAT rules are correctly applied and translation sessions are being created and torn down as expected, revealing failures like address-pool exhaustion or rule misapplication. It is a proprietary extension built on the standard SNMP SMI framework rather than depending on another well-known NAT MIB. It is typically deployed on NMS Communications gateway or session-border-type devices that perform address translation for voice/media or IP traffic. Network engineers evaluating or troubleshooting this functionality can download the NMS-NAT file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NMS-NAT. 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

NMS Communications gateway or session border device

Monitoring Examples

The root object nmsNatObjects anchors the MIB's object tree, under which NAT rule and session-mapping tables (e.g., an implied nmsNatMappingTable/nmsNatRuleTable pattern) would be expected to reside. An administrator would poll session or mapping table entries under nmsNatObjects to check the current count of active translations, and a sudden drop to zero or a spike near a configured pool limit would indicate a NAT resource exhaustion problem. Because only the top-level object name was captured, deeper table structure is inferred rather than confirmed.

What Can Be Monitored

NAT rule configuration
address/port mapping table entries
active translation session count
NAT session statistics

Imported Objects

From NMS-SMI

nmsMgmt

OBJECT-IDENTITY

From RFC1213-MIB

DisplayString

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE

OIDs

OID symbolic	OID numeric	Type	Access	Description
nmsNatMIB	1.3.6.1.4.1.11606.10.9.100			This MIB module defines the generic managed objects for NAT.
nmsNatObjects	1.3.6.1.4.1.11606.10.9.100.1
INT nmsNatSessionNumber	1.3.6.1.4.1.11606.10.9.100.1.1	INTEGER	read-only	The number of the total session in the NAPT rule.
nmsNatSessionTableJD	1.3.6.1.4.1.11606.10.9.100.1.2		not-accessible	The (conceptual) table containing one entry for each NAT session currently active on this NAT device.
nmsNatSessionEntryJD	1.3.6.1.4.1.11606.10.9.100.1.2.1		not-accessible	An entry (conceptual row) containing information about an active NAT session on this NAT device.
OCT nmsNatSessionIdJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.1	OCTET STRING	read-only	The session ID for this NAT session.
INT nmsNatSessionProtocolTypeJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.2	INTEGER	read-only	The protocol type of this session. TCP and UDP sessions are uniquely identified by the tuple of (source IP address, source UDP/TCP port, destination IP address, destination TCP/UCP port). ICMP query sessions are identified by the tuple of (source IP address, ICMP query ID, destination IP address).
INT nmsNatSessionDirectionJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.3	INTEGER	read-only	The direction of this session with respect to the local network. 'inbound' indicates that this session was initiated from the public network into the private network. 'outbound' indicates that this session was initiated from the private network into the public network.
OCT nmsNatSessionIntAddrJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.4	OCTET STRING	read-only	The original IP address of the session endpoint that lies in the private network.
INT nmsNatSessionIntPortJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.5	INTEGER	read-only	The original transport port of the session endpoint that belongs to the private network. If this is an ICMP session then the value is the ICMP request ID.
IP nmsNatSessionExtAddrJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.6	IpAddress	read-only	The translated IP address of the session endpoint that lies in the private network.
INT nmsNatSessionExtPortJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.7	INTEGER	read-only	The original IP address of the session endpoint that lies in the public network.
IP nmsNatSessionRemoteAddrJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.8	IpAddress	read-only	The original IP address of the session endpoint that lies in the public network.
INT nmsNatSessionRemotePortJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.9	INTEGER	read-only	The original transport port of the session endpoint that belongs to the public network. If this is an ICMP session then the value contains the ICMP request ID.
TIK nmsNatSessionUpTimeJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.10	TimeTicks	read-only	The up time of this session in one-hundredths of a second.
TIK nmsNatSessionIdletimeJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.11	TimeTicks	read-only	The time in one-hundredths of a second since a packet belonging to this session was last detected.
STR nmsNatSessionContextJD	1.3.6.1.4.1.11606.10.9.100.1.2.1.12	DisplayString	read-only	A textual string containing information about the protocol context of the session.
INT nmsNATLimitedTotalSessions	1.3.6.1.4.1.11606.10.9.100.1.3	INTEGER	read-write	The number of the total permitted session in the NAPT rule.
nmsNatSessionTable	1.3.6.1.4.1.11606.10.9.100.1.4		not-accessible	The (conceptual) table containing one entry for each NAT session currently active on this NAT device.
nmsNatSessionEntry	1.3.6.1.4.1.11606.10.9.100.1.4.1		not-accessible	An entry (conceptual row) containing information about an active NAT session on this NAT device.
OCT nmsNatSessionId	1.3.6.1.4.1.11606.10.9.100.1.4.1.1	OCTET STRING	read-only	The session ID for this NAT session.
OCT nmsNatSessionProtocolType	1.3.6.1.4.1.11606.10.9.100.1.4.1.2	OCTET STRING	read-only	The protocol type of this session. TCP and UDP sessions are uniquely identified by the tuple of (source IP address, source UDP/TCP port, destination IP address, destination TCP/UCP port). ICMP query sessions are identified by the tuple of (source IP address, ICMP query ID, destination IP address).
OCT nmsNatSessionDirection	1.3.6.1.4.1.11606.10.9.100.1.4.1.3	OCTET STRING	read-only	The direction of this session with respect to the local network. 'inbound' indicates that this session was initiated from the public network into the private network. 'outbound' indicates that this session was initiated from the private network into the public network.
OCT nmsNatSessionIntAddr	1.3.6.1.4.1.11606.10.9.100.1.4.1.4	OCTET STRING	read-only	The original IP address of the session endpoint that lies in the private network.
OCT nmsNatSessionIntPort	1.3.6.1.4.1.11606.10.9.100.1.4.1.5	OCTET STRING	read-only	The original transport port of the session endpoint that belongs to the private network. If this is an ICMP session then the value is the ICMP request ID.
OCT nmsNatSessionExtAddr	1.3.6.1.4.1.11606.10.9.100.1.4.1.6	OCTET STRING	read-only	The translated IP address of the session endpoint that lies in the private network.
OCT nmsNatSessionExtPort	1.3.6.1.4.1.11606.10.9.100.1.4.1.7	OCTET STRING	read-only	The original IP address of the session endpoint that lies in the public network.
OCT nmsNatSessionRemoteAddr	1.3.6.1.4.1.11606.10.9.100.1.4.1.8	OCTET STRING	read-only	The original IP address of the session endpoint that lies in the public network.
OCT nmsNatSessionRemotePort	1.3.6.1.4.1.11606.10.9.100.1.4.1.9	OCTET STRING	read-only	The original transport port of the session endpoint that belongs to the public network. If this is an ICMP session then the value contains the ICMP request ID.
OCT nmsNatSessionUpTime	1.3.6.1.4.1.11606.10.9.100.1.4.1.10	OCTET STRING	read-only	The up time of this session in one-hundredths of a second.
OCT nmsNatSessionIdletime	1.3.6.1.4.1.11606.10.9.100.1.4.1.11	OCTET STRING	read-only	The time in one-hundredths of a second since a packet belonging to this session was last detected.
OCT nmsNatSessionContext	1.3.6.1.4.1.11606.10.9.100.1.4.1.12	OCTET STRING	read-only	A textual string containing information about the protocol context of the session.
OCT nmsNATLimitedHostSessions	1.3.6.1.4.1.11606.10.9.100.1.4.1.13	OCTET STRING	read-write	The number of the permitted single session in the NAPT rule.
OCT nmsNATHostFlows	1.3.6.1.4.1.11606.10.9.100.1.4.1.14	OCTET STRING	read-only	The bytes number of each link during one period.
INT nmsNatCpuPercent	1.3.6.1.4.1.11606.10.9.100.1.5	INTEGER	read-only	The number of the total cpu usage percent.
INT nmsNatHeapPercent	1.3.6.1.4.1.11606.10.9.100.1.6	INTEGER	read-only	The number of the total heap allocation percent.
INT nmsNatMblkPercent	1.3.6.1.4.1.11606.10.9.100.1.7	INTEGER	read-only	The number of the total Mblk allocation percent.
INT nmsNathostlimitset	1.3.6.1.4.1.11606.10.9.100.1.8	INTEGER	read-write	set the count that nat can service for inside users
INT nmsNathostlimitcurrent	1.3.6.1.4.1.11606.10.9.100.1.9	INTEGER	read-only	currently, nat service how many inside user.
INT nmsNathostlimitenable	1.3.6.1.4.1.11606.10.9.100.1.10	INTEGER	read-write	enable limit-user function.
OCT nmsNatIf	1.3.6.1.4.1.11606.10.9.100.1.11	OCTET STRING	read-only	the ifindex of NAT Interface.

RFC description

NMS generic managed objects MIB for Network Address Translation (NAT) and PAT session management.

Start monitoring NMS Communications gateway or session border device (NAT) 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 NMS-NAT

What Is NMS-NAT?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description