CISCO-TCPOFFLOAD-MIB

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Category: Cisco Devices, IP and Core Protocols, Network Interfaces

Description: Manages TCP offload engine configuration and statistics for hardware-accelerated TCP processing on Cisco devices.

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What Is CISCO-TCPOFFLOAD-MIB?

This Cisco MIB manages the TCP offload feature on the CMCC (Channel Interface / mainframe connectivity) card, which provides hardware-accelerated TCP processing for connecting mainframe channel traffic to IP networks on Cisco devices. It exposes primarily configuration data: per-card offload path/device identifiers, bound IP address, hostname, router name, and host/router application identifiers, plus a broadcast-enable flag. Its monitoring role is chiefly about software/configuration status of the offload feature on the card - confirming the offload session is correctly bound to the intended host and router - rather than reporting temperature or CPU load directly. It is specific to Cisco's mainframe channel connectivity hardware and does not draw on a broader public standard. Typical deployment is on Cisco routers with CMCC line cards providing TN3270/SNA-over-IP or similar mainframe channel-to-IP connectivity. Engineers can download the CISCO-TCPOFFLOAD-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-TCPOFFLOAD-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 routers with CMCC (mainframe channel connectivity) line cards
Cisco TCP-offload-capable line cards

Monitoring Examples

cipCardOffloadConfigTable/cipCardOffloadConfigEntry rows, keyed by cipCardOffloadConfigPath and cipCardOffloadConfigDevice, expose cipCardOffloadConfigIpAddr, cipCardOffloadConfigHostName, and cipCardOffloadConfigRouterName so an admin can confirm a CMCC card's TCP offload session is bound to the correct host and router IP addresses after a configuration change or card reload. Checking cipCardOffloadConfigBroadcastEnable alongside cipCardOffloadConfigLinkHostAppl/cipCardOffloadConfigAPIHostAppl verifies the expected application binding and broadcast-handling behavior for that offload path.

What Can Be Monitored

TCP offload configuration per card
configured host/router IP address bindings
hostname and router name mapping
broadcast-enable setting
host/router application bindings

Imported Objects

From CISCO-CHANNEL-MIB

cipCardDtrBrdIndex	OBJECT-TYPE
cipCardEntryIndex	OBJECT-TYPE
cipCardSubChannelIndex	OBJECT-TYPE

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From SNMPv2-SMI-v1

IpAddress

From SNMPv2-TC-v1

DisplayString
RowStatus
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoTcpOffloadMIB	1.3.6.1.4.1.9.9.31
tcpOffloadObjects	1.3.6.1.4.1.9.9.31.1
cipCardOffloadConfig	1.3.6.1.4.1.9.9.31.1.1
cipCardOffloadConfigTable	1.3.6.1.4.1.9.9.31.1.1.1		not-accessible	This table contains configuration information for the TCP offload feature on the CMCC card. Changing these parameters will take effect immediately. The management station can create an entry in this table by setting the appropriate value in cipCardOffloadConfigRowStatus. All the objects in this table must be supplied for a successful create/set.
cipCardOffloadConfigEntry	1.3.6.1.4.1.9.9.31.1.1.1.1		not-accessible	A list of OFFLOAD configuration values.
OCT cipCardOffloadConfigPath	1.3.6.1.4.1.9.9.31.1.1.1.1.1	OCTET STRING	read-write	Hex path identifier for the escon director switch port containing the fiber from the channel on the host to which this CMCC CLAW task connects. This is a concatenation of the switch port number, the channel logical address (used by the host to associate an logical partition (LPAR) with the control unit), and the control unit logical address (address of a logical control unit used by the host to associate a group of physical devices). For a directly connected channel, the switch port number is usually 01.
OCT cipCardOffloadConfigDevice	1.3.6.1.4.1.9.9.31.1.1.1.1.2	OCTET STRING	read-write	Two digit hex device address for the device the SNA host will use to communicate with the offload task on the CMCC. The address must be even.
IP cipCardOffloadConfigIpAddr	1.3.6.1.4.1.9.9.31.1.1.1.1.3	IpAddress	read-write	IP address of the host application for the offload task as specified in the HOME statement of the PROFILE TCPIP.
STR cipCardOffloadConfigHostName	1.3.6.1.4.1.9.9.31.1.1.1.1.4	DisplayString	read-write	Host name parameter as specified in the DEVICE statement of the PROFILE TCPIP.
STR cipCardOffloadConfigRouterName	1.3.6.1.4.1.9.9.31.1.1.1.1.5	DisplayString	read-write	Workstation name parameter as specified in the DEVICE statement of the mainframe PROFILE TCPIP.
STR cipCardOffloadConfigLinkHostAppl	1.3.6.1.4.1.9.9.31.1.1.1.1.6	DisplayString	read-write	Name of the application providing the IP link services, as specified in the mainframe configuration.
STR cipCardOffloadConfigLinkRouterAppl	1.3.6.1.4.1.9.9.31.1.1.1.1.7	DisplayString	read-write	Name of the router application providing the IP link services, as specified in the mainframe configuration.
STR cipCardOffloadConfigAPIHostAppl	1.3.6.1.4.1.9.9.31.1.1.1.1.8	DisplayString	read-write	Name of the mainframe application providing the API services, as specified in the mainframe configuration.
STR cipCardOffloadConfigAPIRouterAppl	1.3.6.1.4.1.9.9.31.1.1.1.1.9	DisplayString	read-write	Name of the router application providing the API services, as specified in the mainframe configuration.
T/F cipCardOffloadConfigBroadcastEnable	1.3.6.1.4.1.9.9.31.1.1.1.1.10	TruthValue	read-write	Control processing of broadcast frames for the path/device this instance of OFFLOAD is configured on. Enable turns broadcast processing on.
ROW cipCardOffloadConfigRowStatus	1.3.6.1.4.1.9.9.31.1.1.1.1.11	RowStatus	read-write	This object is used by a management station to create or delete the row entry in cipCardOffloadConfigTable following the RowStatus textual convention.
ciscoTcpOffloadMibConformance	1.3.6.1.4.1.9.9.31.2
ciscoTcpOffloadMibCompliances	1.3.6.1.4.1.9.9.31.2.1
ciscoTcpOffloadMibCompliance	1.3.6.1.4.1.9.9.31.2.1.1
ciscoTcpOffloadMibGroups	1.3.6.1.4.1.9.9.31.2.2
ciscoTcpOffloadGroup	1.3.6.1.4.1.9.9.31.2.2.1

RFC description

Cisco TCP/IP offload MIB for managing TCP stack processing delegation from IBM mainframes to Cisco Channel Interface processors.

Start monitoring Cisco routers with CMCC mainframe channel line cards (legacy) 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 CISCO-TCPOFFLOAD-MIB

What Is CISCO-TCPOFFLOAD-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description