Table Of Contents
Syslog Support for Ethernet Connectivity Fault Management
Prerequisites for Syslog Support for Ethernet Connectivity Fault Management
Restrictions for Syslog Support for Ethernet Connectivity Fault Management
Information About Syslog Support for Ethernet Connectivity Fault Management
Syslog Support for Ethernet Connectivity Fault Management
Benefits of Syslog Support for Ethernet Connectivity Fault Management
How to Enable System Message Logging for Ethernet Connectivity Fault Management
Configuration Examples for System Logging for Ethernet Connectivity Fault Management
Example: Enabling All CFM Syslog Messages
Example: Enabling Cisco MIB Syslog Messages
Example: Enabling IEEE MIB Syslog Messages
Example: Enabling CFM AIS Syslog Messages
Example: Disabling All CFM Syslog Messages
Feature Information for Syslog Support for Ethernet Connectivity Fault Management
Syslog Support for Ethernet Connectivity Fault Management
First Published: February 26, 2009Last Updated: February 6, 2011The Cisco IOS software system message facility helps to define and report errors and changes in system status. System messages aid customers and Cisco engineers in identifying the types and severities of events and in maintaining and operating Cisco IOS devices. For Ethernet connectivity fault management (CFM), system messages also allow network administrators to develop scripts for effectively configuring and managing the CFM function.
This document describes syslog support for Ethernet CFM and how to enable and disable CFM system messages.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for Syslog Support for Ethernet Connectivity Fault Management" section.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
•Prerequisites for Syslog Support for Ethernet Connectivity Fault Management
•Restrictions for Syslog Support for Ethernet Connectivity Fault Management
•Information About Syslog Support for Ethernet Connectivity Fault Management
•How to Enable System Message Logging for Ethernet Connectivity Fault Management
•Configuration Examples for System Logging for Ethernet Connectivity Fault Management
•Feature Information for Syslog Support for Ethernet Connectivity Fault Management
Prerequisites for Syslog Support for Ethernet Connectivity Fault Management
•Knowledge of the Cisco IOS implementation of Ethernet CFM 802.1ag and of ITU-T Y.1731 fault management functions.
Restrictions for Syslog Support for Ethernet Connectivity Fault Management
•CFM does not support user-configurable actions in response to some events.
•CFM does not support the automatic use of CFM operations such as loopback and linktrace when failures are detected.
•Embedded Event Manager (EEM) does not support Simple Network Management Protocol (SNMP) traps.
Information About Syslog Support for Ethernet Connectivity Fault Management
•Syslog Support for Ethernet Connectivity Fault Management
Syslog Protocol and Messages
Syslog is a delivery method for system messages, typically across an IP network. The term "syslog" is used to describe both the protocol that transfers messages and the messages themselves. Syslog is commonly used for managing computer systems and auditing system security. Syslog is supported by a variety of devices across many platforms. Because of this support, syslog can be used to integrate log data from different types of systems into a central repository.
Syslog messages are text messages less than 1 KB. They can be sent using User Datagram Protocol (UDP), TCP, or both. Messages are not encrypted, but a Secure Sockets Layer (SSL) wrapper can be used to provide a layer of encryption through the SSL or Transport Layer Security (TLS) protocols.
Syslog receivers are called "syslogd," "syslog daemon," or "syslog server."
The syslog protocol and message format are defined in RFC 3164, The BSD syslog Protocol.
CFM System Messages
This section describes the types of CFM syslog messages that can be generated and the CFM events that trigger those messages. There are three types of syslog messages:
AIS syslogs
Alarm Indication Signal (AIS) syslog messages can be enabled using the ethernet cfm logging command with the ais keyword. Following are the AIS syslog messages and corresponding CFM events:
•ENTER_AIS_INT—The interface has entered an AIS defect condition.
•EXIT_AIS_INT—The interface has exited an AIS defect condition.
•ENTER_AIS—An Ethernet CFM maintenance endpoint (MEP) has entered an AIS defect condition.
•EXIT_AIS—An Ethernet CFM MEP has exited an AIS defect condition.
Cisco MIB Alarm syslogs
The same Cisco MIB alarm message definitions apply to both VLAN and Ethernet virtual circuit (EVC) services. Cisco MIB alarm syslog messages can be enabled using the ethernet cfm logging command with the alarm and cisco keywords. Following are the Cisco MIB alarm syslog messages and corresponding CFM events:
•REMOTE_MEP_UP—A continuity check (CC) message is received from an active remove MEP.
•REMOTE_MEP_DOWN—The entry in the CC database corresponding to the MEP times out or the device receives a CC message with a zero hold time.
•CROSS_CONNECTED_SERVICE—The CC message contains a customer service instance (CSI) ID or maintenance association (MA) ID is different from what is configured locally on the device.
•FORWARDING_LOOP—A device is receiving CC messages with its maintenance point ID (MPID) and source MAC address.
•CONFIG_ERROR—A device is receiving a CC message with its MPID but a different source MAC address.
•CROSSCHECK_MEP_MISSING—A configured remote MEP does not come up during the cross-check start timeout interval.
•CROSSCHECK_MEP_UNKNOWN—The remote MEP that is received is not in the configured static list.
•CROSSCHECK_SERVICE_UP—The configured service, either CSI or MA, is up as it receives CC messages from all remote, statically configured MEPs.
IEEE MIB Alarm syslogs
The IEEE MIB alarm syslog message can be enabled using the ethernet cfm logging command with the alarm and ieee keywords. Following is the Cisco MIB alarm syslog message and corresponding CFM event:
•FAULT_ALARM—A fault in the network has occurred.
Syslog Support for Ethernet Connectivity Fault Management
The Syslog Support for Ethernet Connectivity Fault Management (Syslog Support for CFM) feature provides syslog support for CFM notifications that can be used to determine the status of services and of network connectivity. This feature is disabled by default. The command-line interface (CLI) ethernet cfm logging command provides the option to either enable or disable all CFM syslogs or to separately enable or disable syslogs for the AIS feature, Cisco MIB alarms, and IEEE MIB alarms.
The Syslog Support for CFM feature must be implemented either on CFM over VLANs or when you use the IEEE 802.1ag on Bridge Domains feature and want to automate diagnostics or implement actions in response to CFM events.
Benefits of Syslog Support for Ethernet Connectivity Fault Management
•Creates a record of events that assists in troubleshooting.
•Establishes a mechanism for leveraging EEM scripts for CFM event notifications.
•Allows control of syslog messages with the CLI ethernet cfm logging command.
How to Enable System Message Logging for Ethernet Connectivity Fault Management
•Disabling CFM Syslog Messages
Enabling CFM Syslog Messages
CFM syslogs are disabled by default. Perform this task to enable CFM syslog messages.
SUMMARY STEPS
1. enable
2. configure terminal
3. ethernet cfm logging [ais | alarm {cisco | ieee}]
4. end
DETAILED STEPS
Disabling CFM Syslog Messages
Perform this task to disable CFM syslog messages.
SUMMARY STEPS
1. enable
2. configure terminal
3. no ethernet cfm logging [ais | alarm {cisco | ieee}]
4. end
DETAILED STEPS
Configuration Examples for System Logging for Ethernet Connectivity Fault Management
•Example: Enabling All CFM Syslog Messages
•Example: Enabling Cisco MIB Syslog Messages
•Example: Enabling IEEE MIB Syslog Messages
•Example: Enabling CFM AIS Syslog Messages
•Example: Disabling All CFM Syslog Messages
Example: Enabling All CFM Syslog Messages
The following example shows how to enable all CFM syslog messages:
Router> enableRouter# configure terminalRouter(config)# ethernet cfm loggingRouter(config)#Example: Enabling Cisco MIB Syslog Messages
The following example shows how to enable all Cisco MIB syslog messages:
Router> enableRouter# configure terminalRouter(config)# ethernet cfm logging alarm ciscoRouter(config)#Example: Enabling IEEE MIB Syslog Messages
The following example shows how to enable IEEE MIB syslog messages for VLAN services:
Router> enableRouter# configure terminalRouter(config)# ethernet cfm logging alarm ieeeRouter(config)#Example: Enabling CFM AIS Syslog Messages
The following example shows how to enable syslog messages specific to the CFM AIS feature:
Router> enableRouter# configure terminalRouter(config)# ethernet cfm logging aisRouter(config)#Example: Disabling All CFM Syslog Messages
The following example shows how to disable all syslog messages:
Router> enableRouter# configure terminalRouter(config)# no ethernet cfm loggingRouter(config)#Additional References
Related Documents
Related Topic Document TitleEthernet CFM
Configuring Ethernet Connectivity Fault Management in a Service Provider Network
IEEE 802.3ah
IEEE 802.3ah Ethernet in the First Mile
ITU-T Y.1731 fault management functions
Delivering and filtering syslog messages
Cisco IOS commands: master list of commands with complete command syntax, command mode, command history, defaults, usage guidelines, and examples
Cisco IOS Carrier Ethernet commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples
Standards
MIBs
MIB MIBs Link•CISCO-ETHER-CFM-MIB
•CISCO-IEEE-CFM-MIB
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:
RFCs
Technical Assistance
Feature Information for Syslog Support for Ethernet Connectivity Fault Management
Table 1 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 1 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
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