CFM Configuration Guide Application Note CONFIDENTIAL AN1283 Rev. APPL-2022.
AN1283 - CFM Configuration Guide Application Note Table of Contents 1. Introduction .............................................................................................................. 3 1.1. IEEE 802.1ag ..................................................................................................... 3 1.2. Definitions ......................................................................................................... 3 1.3. CFM Protocols ...............................................
AN1283 - CFM Configuration Guide Application Note 1. Introduction This document explains how to setup Connectivity Fault Management (CFM) features. Connectivity Fault Management is defined by the IEEE 802.1ag standard. It defines protocols and practices for OAM (Operations, Administration, and Maintenance) for paths through 802.1 bridges and local area networks (LANs). IEEE 802.1ag is largely identical with ITU-T Recommendation Y.1731, which additionally addresses performance monitoring. 1.1. IEEE 802.
AN1283 - CFM Configuration Guide Application Note Continuity Check Protocol (CCP) The Continuity Check Message (CCM) provides a means to detect connectivity failures in an MA. CCMs are multicast messages. CCMs are confined to a domain (MD). These messages are unidirectional and do not solicit a response. Each MEP transmits a periodic multicast Continuity Check Message inward towards the other MEPs.
AN1283 - CFM Configuration Guide Application Note # show running-config feature cfm all-defaults Building configuration...
AN1283 - CFM Configuration Guide interface-status-tlv be overridden organization-specific-tlv be oui subtype value port-status-tlv overridden in sender-id-tlv overridden in chassis chassis-management Address) and Management disable management Address). Application Note Include or exclude Interface Status TLV in CCM PDUs (may in domain and service). Include or exclude Organization-Specific TLV in PDUs (may overridden in domain and service). The OUI on form XX-XX-XX. Subtype value (0-255).
AN1283 - CFM Configuration Guide format interface-status-tlv in this Application Note Change format of this domain Include or exclude Interface Status TLV in PDUs included domain or let higher level determine (may be overridden in service) level organization-specific-tlv included in this Change level (MEG-level) of this domain Include or exclude Organization-Specific TLV in PDUs MD or let higher level determine (may be overridden in service) port-status-tlv this domain or sender-id-tlv domain (may be
AN1283 - CFM Configuration Guide continuity-check format string to 45 integer icc characters long icc-cc characters long Application Note Specify the CCM interval for all MEPs in this service (MA). Default is 1s. Change the format used in MAID/MEGID for this service (MA). Character string (type 2). A double quoted string with 1 characters. 2-octet integer (type 3), <0-65535>. ITU-T ICC-based format (type 32). Must be exactly 13 double quoted string. ITU-T ICC-CC-based format (type 33).
AN1283 - CFM Configuration Guide Application Note 2.4.
AN1283 - CFM Configuration Guide (config-cfm-dmn-svc)# mep (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# (config-cfm-dmn-svc-mep)# Application Note 301 direction down interface GigabitEthernet 1/2 vlan 100 pcp 6 no smac remote mep 300 continuity-check alarm-level 1 alarm-time-present 2500 alarm
AN1283 - CFM Configuration Guide Application Note # show cfm mep det Defect abbreviations (alarm level in parentheses): R (1): someRDIdefect (RDI received from at least one remote MEP) M (2): someMACstatusDefect (received Port Status TLV != psUp or Interface Status TLV != isUp) C (3): someRMEPCCMdefect (valid CCM is not received within 3.
