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This guide describes the Cisco 7301 router implementation of the Simple Network Management Protocol (SNMP) in Cisco IOS Release 12.2SB. The Cisco 7301 router provides application-specific features for broadband subscriber aggregation and network application services. SNMP provides a set of commands for setting and retrieving the values of operating parameters on the Cisco 7301 router. 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:
•Obtaining Technical Assistance
•Obtaining Additional Publications and Information
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. Note that not all Cisco documents use a Document Revision History table.
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12.2(31)SB2 |
OL-6385-03 |
December 2006 |
•Updated frCircuitTable MIB object for the RFC1315-MIB, page 62.
•Added the CISCO-NETFLOW-MIB which includes SNMP access to important 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.
•Interface mapping improvements—Improved existing CISCO-AAA-SESSION-MIB to map sessions to underlying interfaces. See Billing Customers for Traffic, page 20.
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12.2SB REL3 |
OL-6385-02 |
February 2006 |
•Added manageability improvements on the Cisco 7301 router platform port adapters only:
–Cisco 7301 Network Processing Engine 1 (CPU)
–Port adapters—See Table 3-1 for a list of supported port adapters.
•Updated the following MIBs:
–CISCO-ENTITY-VENDORTYPE-OID-MIB
–ENTITY-MIB (RFC 2737)—Enhancements:
•Model NPE-G1 processor in the ENTITY-MIB with GE ports (RJ-45 and SFP module.
•Represent sensors in the physical containment hierarchy to support CISCO-ENTITY-SENSOR-MIB
•Support for port adapter and processor eprom values for entity objects
–NOTIFICATION-LOG-MIB (RFC 3014)
•Cisco 7301 additional port adapter support. For a list of all port adapters supported on the Cisco 7301 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 64 and DS3-MIB (RFC2496), page 64.
•CISCO-PROCESS-MIB—Supports CPU1 statistics.
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12.3(14)T |
OL-6385-01 |
February 2005 |
•Provides core enhancements to network management capabilities.
•Cisco 7301 port adapter support. For a list of all port adapters supported on the Cisco 7301 series routers, see Table 1-1 on page 1-2.
This guide is intended for system and network administrators who must configure the Cisco 7301 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 7301 router.
This guide contains the following chapters:
•Chapter 1, "Cisco 7301 Router MIB Overview," provides background information about SNMP and its implementation on the Cisco 7301 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 7301 router.
•Chapter 3, "MIB Specifications," describes each MIB included on the Cisco 7301 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 7301 router.
•Appendix A, "Using MIBs,"provides information about how MIBs are used.
•Glossary
•Index
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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