SA-CM-MTA-MIB

All MIBs › SA-CM-MTA-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2016-12-23

Category: Cable and DOCSIS

Description: Manages Cisco Scientific Atlanta cable modem multimedia terminal adapter (MTA) provisioning and status.

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What Is SA-CM-MTA-MIB?

SA-CM-MTA-MIB is a Cisco (formerly Scientific Atlanta) vendor-private MIB, active only at the Cable Modem's own IP address, that controls the embedded Multimedia Terminal Adapter (MTA) voice function inside a DOCSIS/PacketCable cable modem. It exposes provisioning-mode control (saCmMtaProvisioningMode, selecting among PacketCable BASIC/HYBRID/SECURE flows or CM-config-file-only VoIP provisioning), DHCP option requirements (saCmMtaDhcpPktcOption for option 122 vs 177, saCmMtaDhcpOptionSixty for the DHCP option 60 vendor class string), and enable/disable and filter-behavior controls (saCmMtaDevice, saCmMtaIpFilters, saCmMtaSidCount for supported service-flow IDs). Additional objects govern Time-of-Day requirement (saCmMtaRequireTod), config-file decryption (saCmMtaDecryptMtaConfigFile), post-software-download reboot timing (saCmMtaSwUpgradeControlTimer), and the provisioning-time SNMP community string (saCmMtaProvSnmpSetCommunityString). Since most of these objects are set only via the CM configuration file rather than live SNMP SET, monitoring this MIB is primarily useful for confirming how a deployed MTA was provisioned and whether embedded voice service is enabled at all. It depends on the underlying DOCSIS cable-modem MIB stack and PacketCable provisioning framework, and is deployed on Cisco/Scientific Atlanta embedded-MTA cable modems, and the SA-CM-MTA-MIB MIB reference documents each of these provisioning objects.

IPNetwork Monitor allows you to monitor SNMP objects defined in SA-CM-MTA-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/Scientific Atlanta embedded-MTA DOCSIS cable modems

Monitoring Examples

An operator polls saCmMtaDevice to confirm the embedded MTA is enabled and checks saCmMtaProvisioningMode against the expected PacketCable flow; a device value stuck at disable(0) despite DHCP option 122.1 being present would indicate the MTA failed its provisioning handshake and the subscriber's voice line will not register.

What Can Be Monitored

MTA enable/disable state
provisioning mode (PacketCable/config-file/web-page)
DHCP PacketCable option requirement (122/177)
IP filter application scope
SID/service-flow count
software-upgrade reboot delay timer

Imported Objects

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
sa	1.3.6.1.4.1.1429
saCmMta	1.3.6.1.4.1.1429.78.1			Controls the behavior of the Cable Modem functional block in Embedded MTA devices. This MIB is active only at the Cable Modem IP address
saCmMtaCliAccess	1.3.6.1.4.1.1429.78.1.1001
INT saCmMtaCliAccessPasswordType	1.3.6.1.4.1.1429.78.1.1001.5	INTEGER	not-accessible	Password type
INT saCmMtaDecryptMtaConfigFile	1.3.6.1.4.1.1429.78.1.13	INTEGER	read-only	To be written.
INT saCmMtaDevice	1.3.6.1.4.1.1429.78.1.1	INTEGER	read-only	Control embedded MTA. If disable(0), MTA will not send out DHCP DISCOVER message. If DHCP option 122.1 is missing, MTA is disabled and MIB is set to disable(0). Note: Equivalent of VSIF 54. Note: This object can be set via the CM configuration file ONLY.
STR saCmMtaDhcpOptionSixty	1.3.6.1.4.1.1429.78.1.20	SnmpAdminString	read-only	Defines the string value for SIP EMTA DHCP DISCOVER option 60 text. This mib is only writeable in the the CM config file. Default option 60 value is pktc1.0
INT saCmMtaDhcpPktcOption	1.3.6.1.4.1.1429.78.1.8	INTEGER	read-only	This object must only be set via the CM configuration file during the provisioning process. After CM is operational, this object can not be set via SNMP. 0: CM and MTA will accept only PacketCable option 122. If option 122 is not included in CM DHCP OFFER, MTA will not start. 1: CM and MTA will accept 122 or 177 or none. If DHCP OFFER contains 122 or 177, MTA will process it. 2: CM and MTA will accept only PacketCable option 177. If option 177 is not included in CM DHCP OFFER, MTA will not start. This MIB is saved into modem's non-vol memory and the new value is active after the modem registers and reboots again (DHCP comes before config file parsing). Note: Equivalent of VSIF 64 Note: This object can be set via the CM configuration file ONLY.
INT saCmMtaIpFilters	1.3.6.1.4.1.1429.78.1.3	INTEGER	read-write	DOCSIS config file filters (from RFC2669) are normally applied to the MTA and all CPE interfaces per the eDOCSIS spec. This MIB controls if the filters are applied to the MTA. 0: Follow e-docsis spec - apply filters to MTA, Ethernet and USB ports (default) 1: Do not apply any filters to the MTA - apply filters only to Ethernet and USB ports Filters do NOT block traffic to/from the MTA. Note: Equivalent of VSIF 77
INT saCmMtaProvisioningMode	1.3.6.1.4.1.1429.78.1.7	INTEGER	read-only	This object must only be set via the CM configuration file during the provisioning process. After CM is operational, this object can not be set via SNMP. MTA provisioning modes: 0: MTA follows the PacketCable provisioning specifications and supports BASIC, HYBRID and SECURE flows. 1: MTA will provision using only the CM config file. VoIP parameters MUST be included in the CM config file as VSIFs. This option will become obsolete. 2: MTA will learn the MTA config file name and location from the MTA DHCP OFFER. If the filename or location is missing, MTA will switch to mode 3. 3: MTA will learn the MTA config file name and location via SNMP. The MTA will send an SNMP inform to the provisioning server specified in DHCP option 122.3 or 177.3, depending on saCmMtaDhcpPktcOption (note: MTA will not provision if saCmMtaDhcpPktcOption = requireNone(1) and no option 122.3 or 177.3 is specified). 4: MTA will learn the MTA config file name and location and the MTA host name from the MTA DHCP OFFER/ACK. If the filename is missing in the DHCP OFFER/ACK, the MTA will request a config file name based on the MTA mac address (example: 000f21c4e145.bin). If the MTA host name is missing in the DHCP OFFER/ACK the MTA will use a host name of MAC_ADDR (example: 000f21c4e145). 5: MTA will request a config file name based on the MTA mac address (example: 000f21c4e145.bin). MTA will learn the MTA config file location via DHCP. MTA will use a host name of MAC_ADDR (example: 000f21c4e145). MTA will NOT use the file name and host name in the DHCP ACK even if the parameters are present. 6: Web page provisioning. Parameters from a web page will be used rather than from config file. All the web page parameters are stored in non-vol. Base provisioning method is 2 above. For modes other than 0, MTA DHCP options 122, 177 are not required. Note: This object can be set via the CM configuration file ONLY.
STR saCmMtaProvSnmpSetCommunityString	1.3.6.1.4.1.1429.78.1.26	SnmpAdminString	read-only	The value set in this object becomes the SNMPv2c community string that will be accepted in the SNMPSET sent from the provisioning server during MTA registration. Provisioning methods affected include: - Pktc HYBRID.1 (MTA-19 only) - Pktc HYBRID.2 (MTA-19 only) Note: Pktc SECURE mode is NOT affected. Note: This setting only affects provisioning-related SNMPSET, not SNMPSET sent by the prov server to the MTA after it has completed registration. Note: This object can be set via the CM configuration file ONLY.
INT saCmMtaRequireTod	1.3.6.1.4.1.1429.78.1.10	INTEGER	read-only	This object controls if the EMTA will continue the provisioning process if a response from a Time of Day server is not available at provisioning step CM-8. If set to true(1) the EMTA will require a ToD response. If set to false(0) the EMTA will request ToD but will not require the TOD server response. Note: For PacketCable secure provisioning, if this object is set to false(0), and ToD is not available, MTA will probably be unable to verify that certificates are valid and will not provision. Note: this object can be set in the CM config file only.
INT saCmMtaSidCount	1.3.6.1.4.1.1429.78.1.5	INTEGER	read-only	Number of SIDs the MTA supports.
INT saCmMtaSwUpgradeControlTimer	1.3.6.1.4.1.1429.78.1.14	INTEGER	read-write	This object is used to control the conditions for rebooting the modem following a software download: 0: Docsis Default: Always download software and reboot immediately after software download, 1: Do not download software if any phone endpoint is off hook and return 13 to docsDevSwAdminStatus when set to upgradgeFromMgt(1), other: Download software immediately but delay the reboot until all lines have been on-hook for the specified time in seconds. Note: docsDevSwOperStatus shows inProgess(1) even if the download itself has finished and MTA is waiting for user to hang up.
saVoip	1.3.6.1.4.1.1429.78

RFC description

Cable modem and embedded MTA device management for DOCSIS cable systems.

Start monitoring Cisco/Scientific Atlanta embedded-MTA DOCSIS cable modems (voice provisioning-mode configuration) 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 SA-CM-MTA-MIB

What Is SA-CM-MTA-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description