About This Guide
This guide describes the implementation of the Simple Network Management Protocol (SNMP) in Cisco IOS Release Release 12.4(11)T, Release 12.4(4)XD7, and Release 12.2(31)SB5, applicable to the Cisco 7200 series routers and Cisco 7201 router. SNMP provides a set of commands for setting and retrieving the values of operating parameters on the Cisco 7200 series routers. Router information is stored in a virtual storage area called a Management Information Base (MIB), which contains many MIB objects that describe router components and provides information about the status of the components.
This Preface provides an overview of this guide with the following sections:
•Guide Revision History
•Obtaining Technical Assistance
•Obtaining Additional Publications and Information
Guide Revision History
The following Guide Revision History tables record technical changes, additions, and corrections to this document. The table shows the release number and document revision number for the change, the date of the change, and a brief summary of the change.
Description of Changes in Cisco IOS Release 12.4(4)XD7 and Release 12.2(31)SB5
12.4(4)XD7 and 12.2(31)SB5
This edition of the document adds information for MIBs supported on the Cisco 7201 router, and related new traps and MIB restrictions. This document also adds information for supported port adapters associated with the Cisco 7201 router.
The following is a list of MIBs supported for the Cisco 7201 router in this release:
•CISCO-ENTITY-MIB—(is this MIB cited as a class of ENTITY MIBs, or is this distinct from others that cite ENTITY?)
•CISCO-VENDORTYPE-MIB—Added the OID
•Port adapters—These Cisco IOS releases support several port adapters on the Cisco 7201 router. Refer to Port Adapter (PA) roadmaps cited in multiple locations of this document.
The following MIBs are compliant with and supported on the Cisco 7201 router:
•OSPF MIB (RFC1253)
•RMON-MIB (RFC 1757)
•SNMP-USM-MIB (RFC 2574)
•SNMP-VACM-MIB (RFC 2575)
•SNMPv2-MIB (RFC 1907)
•TCP-MIB (RFC 2012)
•UDP-MIB (RFC 2013)
Description of Changes in Cisco IOS Release 12.4(11)T
•Updated the following MIBs:
–CISCO-PROCESS-MIB—Second CPU statistics support added. These entries for the second CPU objects help enhance customer's monitoring capabilities.
–IF-MIB—Improved inventory management and monitoring capabilities
•Added information about CPU Utilization. See How to Collect CPU Utilization on Cisco IOS Devices Using SNMP, page 26
•Added the CISCO-NETFLOW-MIB which includes SNMP access to information available in the NetFlow Cache. This is not a replacement for the traditional NetFlow export mechanism, but a method to take a snapshot of the cache register and make it available via SNMP. This functionality is useful for security verification, discovering use of network resources, and identifying top individual contributors to network utilization.
•Added support for the PA-MC-2T3-EC and PA-MC-T3-EC enhanced T3 Multichannel Port Adapters and the PA-T/E3E-EC and PA-2T/E3-EC Clear Channel T3/E3 Port Adapters.
•Updated Cisco7200 platform support for unique device identifier (UDI) compliance. Added support for the unique device identifier (UDI) standard which displays information from any Cisco product that has electronically stored identity information. See ENTITY-MIB UDI Support, page 45.
•Interface mapping improvements—Improved existing CISCO-AAA-SESSION-MIB to map sessions to underlying interfaces. See Using CISCO-AAA-SESSION-MIB, page 27.
Description of Changes in Cisco IOS Release 12.2SB
•Added manageability improvements on the Cisco 7200 series router platform port adapters:
–Cisco 7200 NPE-G1, NPE-400, NPE-225
–Port adapters—Refer to additional Port Adapter (PA) documentation roadmaps in this document for additional information.
•Updated the following MIBs for improved inventory management and monitoring capabilities:
–ENTITY-MIB (RFC 2737)
–NOTIFICATION-LOG-MIB (RFC 3014)
•Added Cisco 7200 series additional port adapter support. For a list of all port adapters supported on the Cisco 7200 series routers.
•Support for DS1 and DS3 MIBs is implemented as defined by RFC2495 and RFC2496, respectively. For detailed information, see DS1-MIB (RFC2495), page 66 and DS3-MIB (RFC2496), page 66.
•Added mapping information regarding the ENTITY-MIB and the CISCO-OLD-CHASSIS-MIB.
Description of Changes in Cisco IOS Release 12.3(14)T
•Cisco 7200 series additional port adapter support. Refer to additional Port Adapter (PA) documentation roadmaps in this document for additional information.
•Support for DS1 and DS3 MIBs is
impl mented as defined by RFC2495 and RFC2496, respectively. For detailed information, see "DS1-MIB (RFC2495)" section on page 66 and "DS3-MIB (RFC2496)" section on page 66.
This guide is intended for system and network administrators who must configure the Cisco 7200 router for operation and monitor its performance in the network.
This guide may also be useful for application developers who are developing management applications for the Cisco 7200 router.
This guide contains the following chapters:
•Chapter 1, "Cisco 7200 Router MIB Overview," provides background information about SNMP and its implementation on the Cisco 7200 router and a feature history table describing new features implemented since the last Cisco software release.
•Chapter 2, "Configuring MIB Support," provides instructions for configuring SNMP management support on the Cisco 7200 router.
•Chapter 3, "MIB Specifications," describes each MIB included on the Cisco 7200 router. Each description lists any constraints as to how the MIB is implemented on the router.
•Chapter 4, "Monitoring Notifications," describes the SNMP notifications (traps and informs) supported by the Cisco 7200 router.
•Appendix A, "Using MIBs" provides information about how MIBs are used.
Terminology and Definitions
This section discusses conventions and terminology used in this guide.
•Alarm—In SNMP, the word alarm is commonly misused to mean the same as a Trap (see Trap definition). Alarm represents a condition which causes a trap to be generated.
Note Many commands use the word traps in the command syntax. Unless there is an option in the command to select either traps or informs, the keyword traps refers to either traps, informs, or both. Use the command, snmp-server enable <notification>, where notification is either trap or inform, to specify whether to send SNMP notifications as traps or informs.
•Element Management System (EMS)—An EMS manages a specific portion of the network. For example, the SunNet Manager, an SNMP management application, is used to manage SNMP manageable elements. Element Managers may manage asynchronous lines, multiplexers, PABX, proprietary systems, or an application.
•Informs—Reliable SNMP notifications which are stored in memory until the SNMP manager issues a response. Informs use more system resources than traps.
•Management Information Base (MIB)—The objects that are available in an SNMP managed device. The information is represented in Abstract Syntax Notation 1 (ASN.1). It is a way of logically grouping data so that it is easily understood by all.
•MIB-II—The enhancements to MIB-I which was the original standard SNMP MIB.
•Multiprotocol Label Switching (MPLS)—MPLS is the standardized version of the Cisco original tag-switching proposal. It uses a label forwarding paradigm (forward packets based on labels).
•Remote Network Monitoring (RMON) MIB—SNMP MIB for remote management of networks. While other MIBs are usually created to support a network device whose primary function is other than management, RMON was created to provide management of a network. RMON is one of the many SNMP based MIBs that are IETF Standards.
•Simple Network Management Protocol (SNMP)—An application layer protocol that allows you to remotely manage networked devices. The word "simple" in SNMP is only in contrast to protocols which are thought to be even more complex than SNMP. SNMP consists of the following components: a management protocol, a definition of management information and events, a core set of management information and events, and a mechanism and approach used to manage the use of the protocol including security and access control.
•Synchronous Optical Network (SONET)—A physical layer interface standard for fiber optic transmission.
•Trap—SNMP trap is an unsolicited (device initiated) message. The contents of the message might be simply informational, but it is mostly used to report real-time trap information. Traps are used in conjunction with other SNMP mechanisms, as in trap-directed polling, or the SNMP inform mechanism can be used when a reliable fault reporting system is required.
•User Datagram Protocol (UDP)—A connectionless, non-reliable IP-based transport protocol.
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Obtaining Technical Assistance
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Submitting a Service Request
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Definitions of Service Request Severity
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Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
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