SIP-COMMON-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsSIP-COMMON-MIB

Organization: IETF Session Initiation Protocol Working Group

Last Updated: 2007-04-20

Category: Telephony and VoIP

Description: Contains managed objects common to all SIP entities (user agents, proxies, redirect servers, and registrars), including transport, port, and method statistics.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring SIP-COMMON-MIB with a free 30-day trial of IPNetwork Monitor.

What Is SIP-COMMON-MIB?

SIP-COMMON-MIB is an IETF Session Initiation Protocol Working Group standard MIB defining objects common to all SIP (RFC 3261) entities — User Agents, Proxy, Redirect, and Registrar servers, with entity-specific detail left to companion MIBs. Its config table, keyed by entity, records protocol version, service operational status, service start time/last-change, organization string, max transactions, service notification-enable, and entity type, alongside a port table (port, transport received), an option-tag table (index, tag, header field), a method-supported table (index, name), and a config-timer table. As a status/configuration MIB it lets an administrator confirm SIP entity type, supported methods, and service uptime on any standards-compliant SIP device. It is deployed on standards-compliant SIP User Agent/Proxy/Redirect/Registrar equipment. Engineers implementing or auditing this functionality typically reference the SIP-COMMON-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in SIP-COMMON-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

  • Standards-compliant SIP User Agent/Proxy/Redirect/Registrar equipment

Monitoring Examples

An administrator checks sipCommonCfgServiceOperStatus and sipCommonMethodSupportedTable to confirm a SIP entity's uptime and supported methods on standards-compliant SIP equipment.

What Can Be Monitored

  • SIP entity status and supported methods/options
Imported Objects

From INET-ADDRESS-MIB

InetPortNumber

From NETWORK-SERVICES-MIB

applIndexOBJECT-TYPE

From SIP-TC-MIB

SipTCEntityRole
SipTCMethodName
SipTCOptionTagHeaders
SipTCTransportProtocol

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
TimeTicks
Unsigned32
mib-2

From SNMPv2-TC

RowStatus
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using sipCommonSummaryInRequests OID:

Select a standards-compliant SIP User Agent/Proxy/Redirect/Registrar equipment (entity type/service uptime status) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type sipCommonSummaryInRequests into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. This object indicates the total number of SIP request messages received by the SIP entity, including retransmissions. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Manages Session Initiation Protocol (SIP) entities including User Agents, Proxy, Redirect, and Registrar servers.

Start monitoring standards-compliant SIP User Agent/Proxy/Redirect/Registrar equipment (entity type/service uptime 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.

Download SIP-COMMON-MIB