Configuration Error List - Cisco Catalyst 4500 Series Configuration Manual

Configuring Ethernet CFM

Configuration Error List

CFM configuration errors in CFM 802.1ag can be misconfigurations or extra configuration commands
detected during MEP configuration. They can be caused by overlapping maintenance associations. For
example, if you create a maintenance association with a VLAN list and a MEP on an interface, a potential
leak error could occur if other maintenance associations associated with the same VLAN exist at a higher
level without any MEPs configured. You can display the configuration error list, which is informational
only, by entering the show ethernet cfm errors configuration privileged EXEC command.
IP SLAs Support for CFM
The switch supports CFM with IP Service Level Agreements (SLAs), which gathers Ethernet layer
network performance metrics. Available statistical measurements for the IP SLAs CFM operation
include round-trip time, jitter (interpacket delay variance), and packet loss. You can schedule multiple
IP SLA operations and use Simple Network Management Protocol (SNMP) trap notifications and syslog
messages to monitor threshold violations proactively.
IP SLA integration with CFM gathers Ethernet layer statistical measurements by sending and receiving
Ethernet data frames between CFM MEPs. Performance is measured between the source MEP and the
destination MEP. Unlike other IP SLA operations that provide performance metrics for only the IP layer,
IP SLAs with CFM provide performance metrics for Layer 2.
You can manually configure individual Ethernet ping or jitter operations. You can also configure an IP
SLA automatic Ethernet operation that queries the CFM database for all MEPs in a given maintenance
domain and VLAN. The operation then automatically creates individual Ethernet ping or jitter
operations based on the discovered MEPs.
Because IP SLAs is a Cisco proprietary feature, interoperability between CFM draft 1 and CFM 802.1ag
is handled automatically by the switch.
For more information about IP SLA operation with CFM, see the IP SLAs for Metro-Ethernet feature
module at this URL:
http://www.cisco.com/en/US/docs/ios/12_2sr/12_2srb/feature/guide/sr_meth.html
Configuring Ethernet CFM
CFM draft 8.1 on Catalyst 4500 series switch mandates that you enter the ethernet cfm ieee command
before configuring any other CFM CLI. Without this command, no other CFM CLIs are applied.
Configuring Ethernet CFM requires that you configure the CFM domain. You can optionally configure
and enable other CFM features (such as crosschecking, static remote MEP, port MEPs, CVLAN
MEPs/MIPs, SNMP traps, and fault alarms). Some of the configuration commands and procedures differ
from those used in CFM draft 1. CLIs in draft 1 that have been changed are no longer available; they
have been deprecated and are not allowed. Only the CLIs mentioned in the following sections are
required for draft 8.1.
Upgrading software from CFM draft 1 to draft 8.1 causes a switch to silently drop the draft 1
Note
configuration on the draft 8.1 image. Also, no CFM stateful sync happens between draft 1 and draft 8.1
images. After the upgrade, all CFM configurations must be reconfigured according to the procedures
mentioned for draft 8.1.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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Chapter 63 Configuring Ethernet OAM and CFM
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