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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
Understanding E-LMI
PDU max rate: 10 packets per second
PDU min rate: 1 packet per 1000 ms
Link timeout: 5000 ms
High threshold action: error disable interface
Link fault action: no action
Dying gasp action: no action
Critical event action: no action
Link Monitoring
---------------
Status: supported (on)
Symbol Period Error
Window: 100 x 1048576 symbols
Low threshold: 1 error symbol(s)
High threshold: 299 error symbol(s)
Frame Error
Window: 400 x 100 milliseconds
Low threshold: 1 error frame(s)
High threshold: none
Frame Period Error
Window: 1000 x 10000 frames
Low threshold: 1 error frame(s)
High threshold: 599 error frame(s)
Frame Seconds Error
Window: 700 x 100 milliseconds
Low threshold: 1 error second(s)
High threshold: none
Verifying Status of the Remote OAM Client
To verify the status of a remote OAM client, use the show ethernet oam summary and show ethernet
oam status commands.
To verify the remote client mode and capabilities for the OAM session, use the show ethernet oam
summary command and observe the values in the Mode and Capability fields. The following example
shows that the local client (local interface Gi0/8) is connected to the remote client
Router# show ethernet oam summary
Symbols: * - Master Loopback State, # - Slave Loopback State
& - Error Block State
Capability codes: L - Link Monitor, R - Remote Loopback
U - Unidirection, V - Variable Retrieval
Local Remote
Interface MAC Address OUI Mode Capability
Gi0/8 442b.0348.bc60 00000C active L R
Understanding E-LMI
Ethernet Local Management Interface (E-LMI) is a protocol between the customer-edge (CE) device and
the provider-edge (PE) device. It runs only on the PE-to-CE UNI link and notifies the CE device of
connectivity status and configuration parameters of Ethernet services available on the CE port. E-LMI
interoperates with an OAM protocol, such as CFM, that runs within the provider network to collect OAM
status. CFM runs at the provider maintenance level (UPE to UPE with inward-facing MEPs at the UNI).