Link Monitoring; Mib Retrieval; Miswiring Detection (Cisco-Proprietary); Snmp Traps - Cisco NCS 5500 Series Configuration Manual

Configuring Ethernet OAM

Link Monitoring

Link monitoring enables an OAM peer to monitor faults that cause the quality of a link to deteriorate over
time. When link monitoring is enabled, an OAM peer can be configured to take action when the configured
thresholds are exceeded.

MIB Retrieval

MIB retrieval enables an OAM peer on one side of an interface to get the MIB variables from the remote side
of the link. The MIB variables that are retrieved from the remote OAM peer are READ ONLY.

Miswiring Detection (Cisco-Proprietary)

Miswiring Detection is a Cisco-proprietary feature that uses the 32-bit vendor field in every Information
OAMPDU to identify potential miswiring cases.

SNMP Traps

SNMP traps can be enabled or disabled on an Ethernet OAM interface.

Ethernet CFM

Ethernet Connectivity Fault Management (CFM) is a service-level OAM protocol that provides tools for
monitoring and troubleshooting end-to-end Ethernet services per VLAN. This includes proactive connectivity
monitoring, fault verification, and fault isolation. CFM uses standard Ethernet frames and can be run on any
physical media that is capable of transporting Ethernet service frames. Unlike most other Ethernet protocols
which are restricted to a single physical link, CFM frames can transmit across the entire end-to-end Ethernet
network.
CFM is defined in two standards:
• IEEE 802.1ag—Defines the core features of the CFM protocol.
• ITU-T Y.1731—Redefines, but maintains compatibility with the features of IEEE 802.1ag, and defines
Ethernet CFM supports these functions of ITU-T Y.1731:
• ETH-CC, ETH-RDI, ETH-LB, ETH-LT—These are equivalent to the corresponding features defined
• ETH-AIS—The reception of ETH-LCK messages is also supported.
To understand how the CFM maintenance model works, you need to understand these concepts and features:
some additional features.
in IEEE 802.1ag.
The Linktrace responder procedures defined in IEEE 802.1ag are used rather than the
Note
procedures defined in Y.1731; however, these are interoperable.
Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.1.x
Ethernet CFM
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