Interoperability with SNMP-aware management clients

The SS7 SGC stack includes an SNMP agent, for interoperability with external SNMP-aware management clients. The SGC SNMP agent provides a read-only view of SGC statistics and alarms (through SNMP polling), and supports sending SNMP notifications related to SGC alarms and notifications to an external monitoring system.

In a clustered environment, individual SGC nodes may run their own instances of the SNMP agent, so that statistics and notifications can still be accessed in the event of node failure. Each node is capable of running multiple SNMP agents with different user-defined configuration.

Tip For detailed information about SGC exposed statistics, please see Statistics. For details about SGC alarms and notifications, please see Alarms and Notifications.
Note
Attribute modification restrictions

  • Only attributes that are "Reconfigurable" can be modified after a configuration object is created.

  • Attributes that do not support "Active Reconfiguration" can be changed only when the configuration object is disabled (the value of its disabled attribute is false).

SNMP configuration

Each snmp-node configuration object represents an SNMP agent running as part of a particular SGC node. Exposed configuration allows a single SNMP agent to support a single version of the SNMP protocol. Currently supported SNMP versions are 2c and 3. Multiple snmp-nodes (SNMP agents) can run within a single SGC node. In a clustered environment, each newly created snmp-node is automatically connected to the existing target-address and usm-user.

snmp-node

snmp-node represents an SNMP agent running as part of a particular SGC node.

Attribute name Attribute description Default Modification

oname

object name

dependencies

number of items which depend on this object

Read-only

enabled

is object enabled

false

Reconfigurable using active reconfiguration

active

is object active

Read-only

node

SGC node where the object is used

port

local SNMP listening port

Reconfigurable

host

local SNMP listening bind address

127.0.0.1

Reconfigurable

community

community for read operations

public

Reconfigurable

snmp-version

SNMP version (supported values: v3, v2c)

v2c

Reconfigurable
Note The JMX Object name for snmp-node is SGC:type=snmp,category=snmp-node.

target-address

target-address is cluster wide and represents an SNMP notification target (defines where SNMP notifications will be sent and which protocol version is used).

Attribute name Attribute description Default Modification

oname

object name

dependencies

number of items which depend on this object

Read-only

transportDomain

SNMP transport domain

(SNMP transport protocol supported values: TcpIpv4, UDP, UdpIpv6z, UdpIpv4z, TcpIpv6, TcpIpv4z, TcpIpv6z, UdpDns, UdpIpv6, UdpIpv4, TLSUDP, TcpDns, TLSTCP)

Reconfigurable

target-host

target host address

Reconfigurable

target-port

target port

162

Reconfigurable

timeout

timeout value (in units of 0.01 seconds) after which unacknowledged SNMP notifications (type inform) will be retransmitted

200

Reconfigurable

retries

number of retransmissions of unacknowledged SNMP notifications (type inform)

1

Reconfigurable

community

community name definition

public

Reconfigurable

notifyType

SNMP notification mechanism

(supported values: trap — asynchronous unacknowledged notification,
inform — asynchronous acknowledged notification)

trap

Reconfigurable

snmp-version

SNMP version

(supported values: v3, v2c)

v2c

Reconfigurable
Note The JMX Object name for target-address is SGC:type=snmp,category=target-address.
Warning target-address can be created, deleted, and its attributes reconfigured, only when all referenced snmp-nodes are disabled.

usm-user

usm-user is cluster wide and represents the SNMP v3 USM user and authentication details.

Attribute name Attribute description Default Modification

oname

object name

dependencies

number of items which depend on this object

Read-only

authProto

authentication protocol

(supported values: SHA, MD5, NONE)

SHA

Reconfigurable

authPassphrase

authentication protocol pass phrase

Reconfigurable

privProto

privacy protocol

(supported values: AES192, DES, DES3, AES256, NONE, AES128)

DES

Reconfigurable

privPassphrase

privacy protocol pass phrase

Reconfigurable

community

specifies community

public

Reconfigurable
Note The JMX Object name for usm-user is SGC:type=snmp,category=usm-user.
Warning usm-user can be created, deleted, and its attributes reconfigured only when all referenced snmp-nodes are disabled.

SGC Stack MIB definitions

MIB definitions for the SGC stack are separated into two files:

  • COMPUTARIS-MIB — basic OID definitions used by the SGC stack

  • CTS-SGC-MIB — SNMP managed objects and SNMP notifications used by the SGC stack.

Tip MIB definitions are also included in the SGC Stack release package under ./doc/mibs/

SNMP managed objects

Managed objects defined in CTS-SGC-MIB can be separated in two groups:

Statistics managed objects

Here are the managed objects representing SGC statistics:

Symbolic OID Numerical OID Equivalent Statistics attribute

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcAssociationTable

.1.3.6.1.4.1.35787.1.1.1

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcAsStateTable

.1.3.6.1.4.1.35787.1.1.2

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcLocalSsnTable

.1.3.6.1.4.1.35787.1.1.3

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcTcapConnectionTable

.1.3.6.1.4.1.35787.1.1.4

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcDpcStatusTable

.1.3.6.1.4.1.35787.1.1.5

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcGtRoutingTable

.1.3.6.1.4.1.35787.1.1.6

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcPcRoutingTable

.1.3.6.1.4.1.35787.1.1.7

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcRemoteSsnTable

.1.3.6.1.4.1.35787.1.1.8

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcHealthTable

.1.3.6.1.4.1.35787.1.1.9

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcSccpStatsTable

.1.3.6.1.4.1.35787.1.1.10

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcSccpErrorStatsTable

.1.3.6.1.4.1.35787.1.1.11

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcTcapStatsTable

.1.3.6.1.4.1.35787.1.1.12

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcObjects.sgcTcapErrorStatsTable

.1.3.6.1.4.1.35787.1.1.13

Alarms managed objects

Here are the managed objects representing SGC alarms:

Symbolic OID Numerical OID Equivalent Alarms MBean

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcActiveAlarmsTable

.1.3.6.1.4.1.35787.1.2.5

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcEventHistoryTable

.1.3.6.1.4.1.35787.1.2.6

SNMP notifications

The MIB defined in CTS-SGC-MIB specifies two notification types that can be emitted by SGC:

  • SGC Alarm — emitted whenever an SGC Alarm is raised

  • SGC Notification — emitted whenever an SGC Notification is emitted.

Here are the notification types emitted by SGC:

Symbolic OID Numerical OID

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcAlarm

.1.3.6.1.4.1.35787.1.2.2

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcNotification

.1.3.6.1.4.1.35787.1.2.3

Here is the content of SGC-emitted SNMP notifications:

Symbolic OID Numerical OID Details

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcAlarmObjects.sgcEventId

.1.3.6.1.4.1.35787.1.2.4.2

unique SGC notification / alarm identifier

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcAlarmObjects.sgcAlarmName

.1.3.6.1.4.1.35787.1.2.4.4

name of the SGC alarm / notification type

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcAlarmObjects.sgcAlarmSeverity

.1.3.6.1.4.1.35787.1.2.4.5

SGC alarm / notification severity

.iso.org.dod.internet.private.enterprises. ctsRegMIB.ctsObjects.sgcEvents.sgcAlarmObjects.sgcAdditionalInfo

.1.3.6.1.4.1.35787.1.2.4.

comma-separated list of SGC Alarm / Notification type specific attribute=value pairs;
this set of attributes depends on SGC Alarm / Notification type and is described in
Alarm Types and Notification Types
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