SNMP

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The Simple Network Management Protocol (SNMP) is used in network management systems to monitor attached hardware for changes in operation activity. SNMP provides a standardized approach to monitoring and managing network systems.

For information on configuring your TMedia product to use the SNMP protocol, see the section labeled "Related Tasks".

Contents

TelcoBridges and SNMP

TelcoBridges offers basic support for SNMP versions 1, 2, and 3. Toolpack supports SNMP V2 and V3 since release 2.5.80 (see Tctrl version history). This grants users the ability to remotely poll (or GET) system variables, known as Managed Objects, which are represented in files known as MIB modules. TelcoBridges currently offers polling on standard MIB modules (RTP, SONET, DS1, DS3, ISDN, etc...) and on the TelcoBridges privately defined module (TB-MIB).

Supported SNMP MIB modules

  1. RFC 1213 MIB II (RFC1213-MIB)
    • All tables of the RFC1213-MIB are supported, with the exception of:
      • ipRouteTable
      • EGP group
      • atTable
  2. RFC 1573 Evolution of Interfaces Group of MIB-II (IF-MIB)
    • The following tables are supported:
      • ifTable
      • ifStackTable
  3. RFC 2495 DS1, J1, E1, DS2, and E2 Interfaces (DS1-MIB)
    • The following tables of the DS1-MIB are supported:
      • Dsx1ConfigTable
      • Dsx1CurrentTable
      • Dsx1IntervalTable
      • Dsx1TotalTable
  4. RFC 2496 - Definitions of Managed Object for the DS3/E3 Interface Type (DS3-MIB)
    • The following tables of the DS3-MIB are supported:
      • Dsx3ConfigTable
      • Dsx3CurrentTable
      • Dsx3IntervalTable
      • Dsx3TotalTable
  5. RFC 1595 - Definitions of Managed Object for the SONET/SDH Interface Type (SONET-MIB)
    • The following tables of the SONET-MIB are supported:
      • sonetMediumTable
      • sonetSectionCurrentTable
      • sonetSectionIntervalTable
      • sonetLineCurrentTable
      • sonetLineIntervalTable
      • sonetFarendLineCurrentTable
      • sonetFarendLineIntervalTable
      • sonetPathCurrentTable
      • sonetPathIntervalTable
      • sonetFarendPathCurrentTable
      • sonetFarendPathIntervalTable
      • sonetVtCurrentTable
      • sonetVtIntervalTable
      • sonetFarendVtCurrentTable
      • sonetFarendVtIntervalTable
  6. RFC 2127 - ISDN Management Information Base using SMIv2 (ISDN-MIB)
    • The following tables of the ISDN-MIB are supported:
      • isdnBearerGroup
      • isdnSignalingGroup
  7. Telcobridges Private MIB module (TB-MIB)
    • tbHwCommon
      • tbHwIdentTable (Hardware Identification)
      • tbHwVersionTable (Hardware Version)
      • tbHwTempTable (Hardware Temperature)
      • tbHwPowerSupplyTable (Hardware Power Supply)
      • tbHwFanTable (Hardware Fan)
    • tbSwCommon
      • tbFeatureTable (Software Features Supported)
      • tbSwVersionTable (Software Version)
      • tbSwPerfTable (CPU Usage)
    • tbSignaling
      • tbMtp2
      • tbM2pa
      • tbM2ua
      • tbM3ua
      • tbIua
      • tbIsdn
      • tbCas
      • tbSip
      • tbH248
    • tbCalls
    • tbNAP
    • tbHaNp1
    • tbHaApp
    • tbClock

SNMP IF-MIB ifTable interface type

The following table provides the interfaces type supported by TelcoBridges (IF-MIB ifTable described in RFC1573) with their corresponding description. The ifType are described in Internet Assigned Number Authority (IANA) in IANAifType-MIB

IANA ifType TelcoBridges Interface description
ethernetCsmacd(6) Baseboard Ethernet interfaces
ds1(18) Trunks Line Interface
ds3(30) DS3 Line Interface
sonet(39) SONET/SDH Line Interface
sonetPath(50) SONET/SDH Line Service PATH (VC4/VC3/STS1/DS3)
sonetVT(51) SONET/SDH Line Service SECTION (VC11/VC12/VT15/VT2)
isdn(63) ISDN Stack
lapd(77) ISDN LAPD Link (Primary)
lapd(77) ISDN LAPD Link (Backup)
isdn(63) IUA Link
isdn(63) IUA Peer
lapd(77) LAPD Link
ss7SigLink (156) SS7 M2PA Link
ss7SigLink (156) SS7 M2UA Link
ss7SigLink (156) SS7 M2UA Peer
ss7SigLink (156) Ss7 M3ua Sap
ss7SigLink (156) Ss7 M3ua Psp
ss7SigLink (156) Ss7 M3ua Psrv
ss7SigLink (156) Ss7 Mtp2 Link

SNMP traps

The SNMP traps module of TelcoBridges products monitor the operation status of some MIBS OIDs and generates notifications when the states change. The default monitoring polling period is set to 1 minute. This value can be modified in the SNMP configuration.

IF-MIB SNMP Trap/Notification (see RFC1573.txt)

Trap Name OID OBJECTS RELEASE
linkDown 1.3.6.1.6.3.1.1.5.3 { ifIndex, ifAdminStatus, ifOperStatus, ifDescr } 2.8+
linkUp 1.3.6.1.6.3.1.1.5.4 { ifIndex, ifAdminStatus, ifOperStatus, ifDescr } 2.8+
linkDown 1.3.6.1.6.3.1.1.5.3 { ifIndex, ifAdminStatus, ifOperStatus } 2.6 and 2.7
linkUp 1.3.6.1.6.3.1.1.5.4 { ifIndex, ifAdminStatus, ifOperStatus } 2.6 and 2.7

TB-MIB SNMP Trap/Notification

Trap Name Details OID OBJECTS CONSIDERED AS AN ALARM RELEASE
tbNapAvailability The network access point has a new percentage of availability for calls
  1. For TDM networks (tbNapSignalingType=isdn(1), ss7(2), casr2(6)) this means there are a percentage of channels available for calls. ss7 includes sigtran signaling type.
  2. For SIP networks (tbNapSignalingType=sip(3)), this means the remote SIP device is answering or not SIP OPTIONS polling messages and calls can be or can`t be made to this network.
  3. When using H.248 (tbNapSignalingType=tdmMedia(5), voipMedia(4)) this means there are TDM channels or RTP ports available or not for calls.
1.3.6.1.4.1.21776.1.1.2.1.0.1 { tbNapName, tbNapSignalingType, tbNapAvailablePercent } When tbNapAvailablePercent=0 2.8+
tbPwrSupplyState The redundant power supply has a new state.

tbHwPwrSupplyStatus can be:
good(0)
failure(1) 		1.3.6.1.4.1.21776.1.1.2.1.0.2 { tbHwPwrSupplyName, tbHwPwrSupplyStatus } When tbHwPwrSupplyStatus=1 2.8+
tbNp1State The N+1 patch panel has a new state.

tbHaNp1FunctionalState can be:
unknown(-1)
fault(0): There is no access to the N+1 patch panel
unprotected(1): Standby unit is not available
unprotectedSwitched(2): Standby unit is active and replaced primary unit is not ready to take over
healthy(3): N+1 unit is normal and standby unit is available
healthySwitched(4): N+1 unit is switched to the standby unit and replaced primary is available 		1.3.6.1.4.1.21776.1.1.2.1.0.3 { tbHaNp1Name, tbHaNp1FunctionalState } When tbHaNp1FunctionalState=0 OR tbHaNp1FunctionalState=2 2.8+
tbAppState This toolpack application has a new state.

tbHaAppCurrentState can be:
unknown(100)
notRunning(101)
starting(102)
ready(103)
shuttingDown(104)
goingManagement(105)
fault(106) 		1.3.6.1.4.1.21776.1.1.2.1.0.4 { tbHaAppName, tbHaAppCurrentState, tbHaAppHostName } When tbHaAppCurrentState=106 2.8+
tbAppHaState This toolpack high availability application has changed state.

tbHaAppHaCurrentState can be:
notPresent(0)
active(1)
standby(2) 		1.3.6.1.4.1.21776.1.1.2.1.0.5 { tbHaAppName, tbHaAppHaCurrentState, tbHaAppHostName } __ 2.8+
tbClkGradeState The network synchronization clock from this interface has a new grade.

tbClockType can be:
none(1)
osc(2)
trunk(3)
netRef1(4)
netRef2(5)
ptmc1(6)
ptmc2(7)
ct8a(8)
ct8b(9)
mbl(10)
bits(11)
ds3(12)
sonetSdh(13)
holdover(14)

tbClockGrade can be:
unqualified(0)
beingQualified(1)
qualified(2)
qualifiedForRecovery(3) 		1.3.6.1.4.1.21776.1.1.2.1.0.6 { tbClockName, tbClockType, tbClockGrade } __ 2.8+
tbClkActiveState This interface has been selected or not to provide the network synchronization clock for the whole system.

tbClockActive can be:
no(0)
yes(1) 		1.3.6.1.4.1.21776.1.1.2.1.0.7 { tbClockName, tbClockType, tbClockActive } When tbClockActive=0 2.8+
tbIsdnDChannelState The signaling channel for this ISDN interface has changed.

tbIsdnDChannelUp can be:
no(0)
yes(1) 		1.3.6.1.4.1.21776.1.1.2.1.0.8 { tbIsdnDescription, tbIsdnDChannelUp } When tbIsdnDChannelUp=0 2.8+
tbCASPhysicalLineState The interface for this CAS stack has changed.

tbCasPhysicalLineUp can be:
no(0)
yes(1) 		1.3.6.1.4.1.21776.1.1.2.1.0.9 { tbCasDescription, tbCasPhysicalLineUp } When tbCasPhysicalLineUp=0 2.8+
tbSipState The SIP stack state has changed.

tbSipCurrentState can be:
no(0)
yes(1) 		1.3.6.1.4.1.21776.1.1.2.1.0.10 { tbSipDescription, tbSipCurrentState } When tbSipCurrentState=0 2.8+
tbH248MgcState The H.248 communication state between this unit and the Media Gateway Controller has changed.

tbH248MgcCurrentState can be:
up(1)
down(2)
unknown(3) 		1.3.6.1.4.1.21776.1.1.2.1.0.11 { tbH248MgcName, tbH248MgcCurrentState } When tbH248MgcCurrentState=2 2.8+
tbHostUpdateAvailableState The availability state of the host update has changed.

tbHostUpdateAvailable can be:
false(0)
true(1)
notSupported(2)
unknown(3)
disabled(4) 		1.3.6.1.4.1.21776.1.1.2.1.0.12 { tbHostName, tbHostUpdateAvailable } __ 2.8+


Example of packet capture: 

tcpdump port 162 -i mgmt0 -s 0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on mgmt0, link-type EN10MB (Ethernet), capture size 65535 bytes
14:08:51.491789 IP 10.7.0.13.37452 > 10.7.0.221.snmptrap: V2Trap(144) system.sysUpTime.0=9546160 S:1.1.4.1.0=S:1.1.5.4
interfaces.ifTable.ifEntry.ifIndex.452160.26=26 interfaces.ifTable.ifEntry.ifAdminStatus.452160.26=1 
interfaces.ifTable.ifEntry.ifOperStatus.452160.26=1  S:1.1.4.3.0=E:8072.3.2.10

Note

The ifIndex is a random value that can change after configuring the system, or adding new elements. This should not be relied on as a reference value. Please use the ifDescr instead.

SNMP SET

The SNMP SET command is not supported by TelcoBridges products. However, a RESTful API can be used to change the configuration remotely.


Configuration

The below procedures should be used to support SNMP v1 ONLY for Toolpack systems previous to 2.5.80:


External Sources



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