CISCO-IETF-SCTP-MIB

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Organization: IETF SIGTRAN Working Group

Last Updated: 2001-08-08

Category: Cisco Devices, IP and Core Protocols

Description: Manages SCTP (Stream Control Transmission Protocol) associations, endpoints, and transport statistics.

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What Is CISCO-IETF-SCTP-MIB?

CISCO-IETF-SCTP-MIB manages the Stream Control Transmission Protocol (SCTP, RFC 2960) on Cisco devices, a transport protocol used for reliable, message-oriented signaling traffic such as SS7-over-IP (SIGTRAN) and other multi-homed session transport. An SCTP MIB of this kind typically exposes SCTP association tables, local/remote endpoint addresses and ports, association state, and per-association or per-path transport statistics such as retransmissions, round-trip time, and path status. Its monitoring purpose is protocol/software-level health: administrators track SCTP association state to confirm signaling associations remain established, and watch retransmission and path-failure counters to detect network-layer instability affecting SCTP-dependent applications like SIGTRAN gateways or Diameter-over-SCTP signaling. It directly implements the IETF SCTP MIB defined against RFC 2960 and depends on that standard's data model, making it a vendor implementation of an established IETF protocol MIB. It is deployed on Cisco platforms carrying SCTP-based signaling traffic, such as media gateways, SIGTRAN gateways, or mobile-core signaling nodes. Network engineers evaluating or troubleshooting this functionality can download the CISCO-IETF-SCTP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-SCTP-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 signaling gateways / SIGTRAN-capable routers and media gateways

Monitoring Examples

Since this Cisco implementation follows RFC 2960's data model, an admin would poll the SCTP association table to check association state, such as established versus closed, for each SIGTRAN signaling link, and monitor per-path retransmission and heartbeat counters to detect a flapping multi-homed path between signaling gateways. A rising retransmission count on one path while the alternate path remains healthy would indicate a partial network failure that SCTP's multi-homing is compensating for, prompting investigation of the affected route. Because no vendor-specific object names beyond the standard SCTP MIB structure are documented for this module, monitoring is typically done via the standard association and local/remote endpoint indices.

What Can Be Monitored

SCTP association state
local/remote endpoint addresses and ports
retransmission counts
path/round-trip-time statistics

Imported Objects

From CISCO-SMI

ciscoExperiment

OBJECT-IDENTITY

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter64
Gauge32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TimeStamp

How to Use in IPNetwork Monitor

Example using cSctpActiveEstabs OID:

Select a Cisco signaling gateway or media gateway 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 cSctpActiveEstabs into the Find box to locate it in the OID tree, then select it and click OK. The number of times that SCTP associations have made a direct transition to the ESTABLISHED state from the COOKIE-ECHOED state: COOKIE-ECHOED -> ESTABLISHED. 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 Counter64-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

OID symbolic	OID numeric	Type	Access	Description
C64 cSctpAborteds	1.3.6.1.4.1.9.10.75.1.1.11	Counter64	read-only	The number of times that SCTP associations have made a direct transition to the CLOSED state from any state using the primitive 'ABORT': AnyState --Abort--> CLOSED. Ungraceful termination of the association.
C64 cSctpActiveEstabsEx	1.3.6.1.4.1.9.10.75.1.1.9	Counter64	read-only	The number of times that SCTP associations have made a direct transition to the ESTABLISHED state from the COOKIE-ECHOED state: COOKIE-ECHOED -> ESTABLISHED. The upper layer has initiated the association attempt.
cSctpAssocEntry	1.3.6.1.4.1.9.10.75.1.2.2.1		not-accessible	General common variables and statistics for the whole association.
U32 cSctpAssocHeartBeatTimer	1.3.6.1.4.1.9.10.75.1.2.2.1.8	Unsigned32	read-only	The current heartbeat time-out. The recommended default value is 30000 milliseconds.
U32 cSctpAssocId	1.3.6.1.4.1.9.10.75.1.2.2.1.1	Unsigned32	not-accessible	Association Identification. Value identifying the association (typically the Initiate Verification Tag). If the selected AssocID is the Initiate Verification Tag, this value must not be zero.
U32 cSctpAssocInStreams	1.3.6.1.4.1.9.10.75.1.2.2.1.10	Unsigned32	read-only	Inbound Streams according to the negotiation at association start up. This parameter has to be read-only by the manager.
cSctpAssocLocalAddressEntry	1.3.6.1.4.1.9.10.75.1.2.3.1		not-accessible	Local information about the available addresses.
IP cSctpAssocLocalAddressIP	1.3.6.1.4.1.9.10.75.1.2.3.1.2	InetAddress	not-accessible	The value of a local IP address available for this association. An InetAddress value is always interpreted within the context of an InetAddressType value. If SCTP are using DNS names, the mapping to IP address-es will be done at reception of INIT or INIT_ACK messages.
IPt cSctpAssocLocalAddressIPType	1.3.6.1.4.1.9.10.75.1.2.3.1.1	InetAddressType	not-accessible	Internet type of local IP address used for this association. - unknown (0) An unknown address type. This value MUST be used if the value of the corresponding InetAddress object is a zero-length string. It may also be used to indicate an IP address different from IPv4 or IPv6. This value is used in this MIB for error conditions. - ipv4 (1): An IPv4 address as defined by the InetAddressIPv4 textual convention [RFC2851]. - ipv6 (2): An IPv6 address as defined by the InetAddressIPv6 textual convention [RFC2851].
TIM cSctpAssocLocalAddressStartTime	1.3.6.1.4.1.9.10.75.1.2.3.1.3	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpAssocLocalAddressTable	1.3.6.1.4.1.9.10.75.1.2.3		not-accessible	Expanded table of cSctpAssocTable based on the AssocId index. It shows several interesting data for each local address which takes part in this association.
INE cSctpAssocLocalSCTPPort	1.3.6.1.4.1.9.10.75.1.2.2.1.3	InetPortNumber	read-only	Local SCTP port number used for this association.
U32 cSctpAssocMaxRetr	1.3.6.1.4.1.9.10.75.1.2.2.1.12	Unsigned32	read-only	The maximum number of data retransmissions in the association context. This value is specific for each association and the upper layer can change it calling the appropriate primitives. This value has to be smaller than the addition of all the maximum number for all the paths (cSctpAssocRemAddressMaxPathRetrans). Recommended value: 10 attempts.
U32 cSctpAssocOutStreams	1.3.6.1.4.1.9.10.75.1.2.2.1.11	Unsigned32	read-only	Outbound Streams according to the negotiation at association start up. This parameter has to be read-only by the manager.
cSctpAssocRemAddressEntry	1.3.6.1.4.1.9.10.75.1.2.4.1		not-accessible	Information about THE most important variables for every remote IP address
INT cSctpAssocRemAddressHBFlag	1.3.6.1.4.1.9.10.75.1.2.4.1.4	INTEGER	read-only	The optional Heartbeat associated to one destination transport address could be active or not (value equal to 0 or 1, respectively). An active destination transport address is the one considered available by a peer endpoint for receiving SCTP packets, as it is described in [cSctp].
IP cSctpAssocRemAddressIP	1.3.6.1.4.1.9.10.75.1.2.4.1.2	InetAddress	not-accessible	The value of a remote IP address available for this association. An InetAddress value is always interpreted within the context of an InetAddressType value.
IPt cSctpAssocRemAddressIPType	1.3.6.1.4.1.9.10.75.1.2.4.1.1	InetAddressType	not-accessible	Internet type of a remote IP address available for this association. - unknown (0) An unknown address type. This value MUST be used if the value of the corresponding InetAddress object is a zero-length string. It may also be used to indicate an IP address different from IPv4 or IPv6. This value is used in this MIB for error conditions. - ipv4 (1): An IPv4 address as defined by the InetAddressIPv4 textual convention [RFC2851]. - ipv6 (2): An IPv6 address as defined by the InetAddressIPv6 textual convention [RFC2851].
U32 cSctpAssocRemAddressMaxPathRtx	1.3.6.1.4.1.9.10.75.1.2.4.1.6	Unsigned32	read-only	Maximum number of DATA retransmissions allowed to a remote IP address before it is considered inactive, as defined in [cSctp]. Recommended value 5 attempts.
U32 cSctpAssocRemAddressRTO	1.3.6.1.4.1.9.10.75.1.2.4.1.5	Unsigned32	read-only	The current Retransmission Timeout. T3-rtx timer as defined in the protocol SCTP.
C64 cSctpAssocRemAddressRtx	1.3.6.1.4.1.9.10.75.1.2.4.1.7	Counter64	read-only	Number of DATA retransmissions as defined in [cSctp].
TIM cSctpAssocRemAddressStartTime	1.3.6.1.4.1.9.10.75.1.2.4.1.8	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
INT cSctpAssocRemAddressStatus	1.3.6.1.4.1.9.10.75.1.2.4.1.3	INTEGER	read-only	The current status of the remote transport address, according to [SCTP]. Active means that the threshold of no answer received from this IP address has not been reached. Inactive means that either no heartbeat was received from this address, or any other message, reaching the threshold defined by the protocol.
cSctpAssocRemAddressTable	1.3.6.1.4.1.9.10.75.1.2.4		not-accessible	Expanded table of cSctpAssocTable based on the AssocId index. It shows several interesting data for each remote peer IP address which is used in this association.
OCT cSctpAssocRemHostName	1.3.6.1.4.1.9.10.75.1.2.2.1.2	OCTET STRING	read-only	Peer's DNS name. If no DNS domain name was received at init time (embedded in the INIT or INIT-ACK chunk) from the peer, this entry will be meaningless, therefore it will contain a NULL value. Otherwise, the remote host name received at init time will be stored.
IP cSctpAssocRemPrimaryAddress	1.3.6.1.4.1.9.10.75.1.2.2.1.6	InetAddress	read-only	Primary destination IP address. An InetAddress value is always interpreted within the context of an InetAddressType value. This value will be filled in after INIT or INIT ACK messages have been received (when the primary path is selected by SCTP).
IPt cSctpAssocRemPrimaryAddressType	1.3.6.1.4.1.9.10.75.1.2.2.1.5	InetAddressType	read-only	Internet type of primary destination IP address. - unknown (0) An unknown address type. This value MUST be used if the value of the corresponding InetAddress object is a zero-length string. It may also be used to indicate an IP address different from IPv4 or IPv6. This value is used in this MIB for error conditions. - ipv4 (1): An IPv4 address as defined by the InetAddressIPv4 textual convention [RFC2851]. - ipv6 (2): An IPv6 address as defined by the InetAddressIPv6 textual convention [RFC2851] This value will be filled in after INIT or INIT ACK messages have been received (when the primary path is selected by SCTP).
INE cSctpAssocRemSCTPPort	1.3.6.1.4.1.9.10.75.1.2.2.1.4	InetPortNumber	read-only	Remote SCTP port number used for this association.
C64 cSctpAssocRtxChunks	1.3.6.1.4.1.9.10.75.1.2.2.1.15	Counter64	read-only	Number of data chunks retransmitted to the peer in the current association.
TIM cSctpAssocStartTime	1.3.6.1.4.1.9.10.75.1.2.2.1.17	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
INT cSctpAssocState	1.3.6.1.4.1.9.10.75.1.2.2.1.9	INTEGER	read-write	The state of this SCTP association. As in TCP, the only value which may be set by a management station is deleteTCB. Accordingly, it is appropriate for an agent to return a 'badValue' response if a management station attempts to set this object to any other value. If a management station sets this object to the value deleteTCB(9), then this has the effect of deleting the TCB (as defined in SCTP) of the corresponding association on the managed node, resulting in immediate termination of the association. As an implementation-specific option, an ABORT chunk may be sent from the managed node to the other SCTP endpoint.
cSctpAssocStatGroup	1.3.6.1.4.1.9.10.75.2.1.5			The cSctp group of objects to manage SCTP statistics related to the remote endpoint.
C64 cSctpAssocT1expireds	1.3.6.1.4.1.9.10.75.1.2.2.1.13	Counter64	read-only	Number of times that T1 timer expired (timer for sending either INIT or COOKIE-ECHO chunks and receiving an acknowledgment).
C64 cSctpAssocT2expireds	1.3.6.1.4.1.9.10.75.1.2.2.1.14	Counter64	read-only	Number of times that T2-shutdown timer expired (shutdown timer).
cSctpAssocTable	1.3.6.1.4.1.9.10.75.1.2.2		not-accessible	A table containing SCTP association-specific information.
cSctpAssocTablesVariablesGroup	1.3.6.1.4.1.9.10.75.2.1.4			The sctp group of objects to manage specific local and remote SCTP variables (local and remote tables). These variables include all the SCTP basic features.
cSctpCompliance	1.3.6.1.4.1.9.10.75.2.2.1			The compliance statement for SNMPv3 entities which implement SCTP. As a remark, the not-accessible objects: cSctpAssocLocalAddressIPType and cSctpAssocRemAddressIPType do not support the dns(4)type since the use of the host names is limited to first stage, when the association is being established. cSctpAssocLocalAddressIP and cSctpAssocRemAddressIP will only accept the size of 4 or 16 because it is only required to support IPv4 and unique IPv6 addresses.
cSctpCompliances	1.3.6.1.4.1.9.10.75.2.2
cSctpConformance	1.3.6.1.4.1.9.10.75.2
G32 cSctpCurrEstab	1.3.6.1.4.1.9.10.75.1.1.8	Gauge32	read-only	The number of SCTP associations for which the current state is either ESTABLISHED, SHUTDOWN-RECEIVED or SHUTDOWN-PENDING.
cSctpGeneralVariablesGroup	1.3.6.1.4.1.9.10.75.2.1.1			Common parameters for all the associations. They can usually be referred as configuration parameters
cSctpGroups	1.3.6.1.4.1.9.10.75.2.1
cSctpInverseGroup	1.3.6.1.4.1.9.10.75.2.1.6			Objects used in the inverse lookup table.
cSctpLookupLocalPortEntry	1.3.6.1.4.1.9.10.75.1.2.5.1		not-accessible	This table is indexed by local port and association ID. Specifying a local port, we would get a list of the associations whose local port is the one specified
TIM cSctpLookupLocalPortStartTime	1.3.6.1.4.1.9.10.75.1.2.5.1.1	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpLookupLocalPortTable	1.3.6.1.4.1.9.10.75.1.2.5		not-accessible	With the use of this table, a list of associations which use that local port can be got
cSctpLookupRemHostNameEntry	1.3.6.1.4.1.9.10.75.1.2.7.1		not-accessible	This table is indexed by remote host name and association ID. Specifying a host name we would get a list of the associations specifying that host name as the remote one
TIM cSctpLookupRemHostNameStartTime	1.3.6.1.4.1.9.10.75.1.2.7.1.1	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpLookupRemHostNameTable	1.3.6.1.4.1.9.10.75.1.2.7		not-accessible	With the use of this table, a list of associations with that particular host can be got
cSctpLookupRemIPAddrEntry	1.3.6.1.4.1.9.10.75.1.2.9.1		not-accessible	This table is indexed by a remote IP address and association ID. Specifying an IP address we would get a list of the associations that have the specified IP address included within the set of remote IP addresses
TIM cSctpLookupRemIPAddrStartTime	1.3.6.1.4.1.9.10.75.1.2.9.1.1	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpLookupRemIPAddrTable	1.3.6.1.4.1.9.10.75.1.2.9		not-accessible	With the use of this table, a list of associations that have the specified IP address as one of the remote ones can be got.
cSctpLookupRemPortEntry	1.3.6.1.4.1.9.10.75.1.2.6.1		not-accessible	This table is indexed by remote port and association ID. Specifying a remote port we would get a list of the associations whose local port is the one specified
TIM cSctpLookupRemPortStartTime	1.3.6.1.4.1.9.10.75.1.2.6.1.1	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpLookupRemPortTable	1.3.6.1.4.1.9.10.75.1.2.6		not-accessible	With the use of this table, a list of associations which use that remote port can be got
cSctpLookupRemPrimIPAddrEntry	1.3.6.1.4.1.9.10.75.1.2.8.1		not-accessible	This table is indexed by primary address and association ID. Specifying a primary address, we would get a list of the associations that have the specified remote IP address marked as primary.
TIM cSctpLookupRemPrimIPAddrStartTime	1.3.6.1.4.1.9.10.75.1.2.8.1.1	TimeStamp	read-only	The value of SysUpTime at the time that this row was created.
cSctpLookupRemPrimIPAddrTable	1.3.6.1.4.1.9.10.75.1.2.8		not-accessible	With the use of this table, it can be got a list of associations that have that the specified IP address as primary within the remote set of active addresses
U32 cSctpMaxAssoc	1.3.6.1.4.1.9.10.75.1.1.5	Unsigned32	read-only	The limit on the total number of SCTP associations the entitycan support. In entities where the maximum number of associations is dynamic, this object should contain the value -1.
U32 cSctpMaxInitRetr	1.3.6.1.4.1.9.10.75.1.1.7	Unsigned32	read-only	The maximum number of retransmissions at the start-up phase (INIT and COOKIE ECHO chunks). Recommended value: 8 attempts.
cSctpMIB	1.3.6.1.4.1.9.10.75			The MIB module for managing SCTP protocol (RFC 2960).
cSctpObjects	1.3.6.1.4.1.9.10.75.1
cSctpOtherStatGroup	1.3.6.1.4.1.9.10.75.2.1.3			The cSctp group of objects providing for management of SCTP most common statistics for the local SCTP layer.
C64 cSctpPassiveEstabs	1.3.6.1.4.1.9.10.75.1.1.10	Counter64	read-only	The number of times that SCTP associations have made a direct transition to the ESTABLISHED state from the CLOSED state: CLOSED -> ESTABLISHED. The remote endpoint has initiated the association attempt.
INT cSctpRtoAlgorithm	1.3.6.1.4.1.9.10.75.1.1.1	INTEGER	read-only	The algorithm used to determine the timeout value (T3-rtx) used for re-transmitting unacknowledged chunks.
U32 cSctpRtoInitial	1.3.6.1.4.1.9.10.75.1.1.4	Unsigned32	read-only	Initial value for the Retransmission timer. Recommended value is 3000 milliseconds.
U32 cSctpRtoMax	1.3.6.1.4.1.9.10.75.1.1.3	Unsigned32	read-only	The maximum value permitted by a SCTP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. Recommended value is 60000 milliseconds.
U32 cSctpRtoMin	1.3.6.1.4.1.9.10.75.1.1.2	Unsigned32	read-only	The minimum value permitted by a SCTP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. Minimum recommended value is 1000 milliseconds. Some telephony applications could require less than 1 second, see [SIGAS] for further information.
cSctpScalars	1.3.6.1.4.1.9.10.75.1.1
C64 cSctpShutdowns	1.3.6.1.4.1.9.10.75.1.1.12	Counter64	read-only	The number of times that SCTP associations have made a direct transition to the CLOSED state from either the SHUTDOWN-SENT state or the SHUTDOWN-ACK-SENT state. Graceful termination of the association.
C64 cSctpStatChecksumErrors	1.3.6.1.4.1.9.10.75.1.1.14	Counter64	read-only	Number of SCTP packets received from the peers with an invalid checksum.
cSctpStateStatGroup	1.3.6.1.4.1.9.10.75.2.1.2			The cSctp group of objects to control state changes in the SCTP protocol local layer. They include the data for all the associations.
C64 cSctpStatFragmentedUsrMessages	1.3.6.1.4.1.9.10.75.1.1.21	Counter64	read-only	Number of user messages that have to be fragmented because of the MTU.
C64 cSctpStatOutOfBlues	1.3.6.1.4.1.9.10.75.1.1.13	Counter64	read-only	Number of out of the blue packets (SCTP packet correctly formed -right checksum- but the receiver is not able to identify the association to which this packet belongs) received by the host.
C64 cSctpStatReassembledUsrMessages	1.3.6.1.4.1.9.10.75.1.1.22	Counter64	read-only	Number of user messages reassembled.
C64 cSctpStatRecCtrlChunks	1.3.6.1.4.1.9.10.75.1.1.18	Counter64	read-only	Number of SCTP control chunks received from the peers (no duplicated included).
C64 cSctpStatRecOrderChunks	1.3.6.1.4.1.9.10.75.1.1.19	Counter64	read-only	Number of SCTP ordered data chunks received from the peers (no duplicated included).
C64 cSctpStatRecSCTPPacks	1.3.6.1.4.1.9.10.75.1.1.24	Counter64	read-only	Number of SCTP packets received from the peers.
C64 cSctpStatRecUnorderChunks	1.3.6.1.4.1.9.10.75.1.1.20	Counter64	read-only	Number of SCTP unordered chunks (data chunks in which the U bit is set to 1) received from the peers (no duplicated included).
C64 cSctpStatSentCtrlChunks	1.3.6.1.4.1.9.10.75.1.1.15	Counter64	read-only	Number of SCTP control chunks sent to the peers (no retransmissions included).
C64 cSctpStatSentOrderChunks	1.3.6.1.4.1.9.10.75.1.1.16	Counter64	read-only	Number of SCTP ordered data chunks sent to the peers (no retransmissions included).
C64 cSctpStatSentSCTPPacks	1.3.6.1.4.1.9.10.75.1.1.23	Counter64	read-only	Number of SCTP packets received from the peers.
C64 cSctpStatSentUnorderChunks	1.3.6.1.4.1.9.10.75.1.1.17	Counter64	read-only	Number of SCTP unordered chunks (data chunks in which the U bit is set to 1) sent to the peers (no retransmissions included).
cSctpTables	1.3.6.1.4.1.9.10.75.1.2
U32 cSctpValCookieLife	1.3.6.1.4.1.9.10.75.1.1.6	Unsigned32	read-only	Valid cookie life in the 4-way start-up handshake procedure. Recommended value: 60000 milliseconds.

RFC description

Cisco vendor-private MIB for SCTP (Stream Control Transmission Protocol) monitoring; RFC-aligned with IETF standards.

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