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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
• Displaying Ethernet OAM Protocol Information, page 10-45
• Verifying Ethernet OAM Configuration, page 10-46
Default Ethernet OAM Configuration
• Ethernet OAM is disabled on all interfaces.
• When Ethernet OAM is enabled on an interface, link monitoring is automatically turned on.
• Remote loopback is disabled.
• No Ethernet OAM templates are configured.
Restrictions and Guidelines
Follow these guidelines when configuring Ethernet OAM:
• The router does not support monitoring of egress frames sent with cyclic redundancy code (CDC)
errors. The ethernet oam link-monitor transmit crc interface-configuration or
template-configuration commands are visible but are not supported on the router. The commands are
accepted, but are not applied to an interface.
• For a remote failure indication, the router does not generate link fault or Critical Event OAM PDUs.
However, if these PDUs are received from a link partner, they are processed. The router supports
generating and receiving Dying Gasp OAM PDUs when Ethernet OAM is disabled, the interface is
shut down, the interface enters the error-disabled state, the router is reloading, or during power
failure.
• Effective with Cisco IOS Release 15.3(2)S, the Cisco ASR 901 router supports sub-second OAM
timers.
• The Cisco ASR 901 router supports up to two Ethernet OAM sessions with sub-second OAM timers.
• Ethernet OAM sessions with sub-second OAM timers reduce the scalability for Ethernet CFM
sessions.
Enabling Ethernet OAM on an Interface
Complete the following steps to enable Ethernet OAM on an interface:
Command Purpose
Step 1
configure terminal Enters global configuration mode.
Step 2
interface interface-id Defines an interface to configure as an Ethernet OAM
interface, and enters interface configuration mode.
Step 3
ethernet oam Enables Ethernet OAM on the interface.