Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 206)

188 Multi-Service IronWare Administration Guide
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IEEE 802.3ah EFM-OAM
6
Sub-second timer sample configuration
Example CER1
Brocade(config)#cfm-enable
Brocade(config-cfm)#domain-name customer level 7
Brocade(config-cfm-md-customer)#ma-name admin vlan 100 priority 7
Brocade(config-cfm-md-customer-ma-admin)#ccm-interval 100-ms
Brocade(config-cfm-md-customer-ma-admin)#mep 1 down port ethe 1/13
Example CER2
Brocade(config)#cfm-enable
Brocade(config-cfm)#domain-name customer level 7
Brocade(config-cfm-md-customer)#ma-name admin vlan 100 priority 7
Brocade(config-cfm-md-customer-ma-admin)#ccm-interval 100-ms
Example CER3
Brocade(config)#cfm-enable
Brocade(config-cfm)#domain-name customer level 7
Brocade(config-cfm-md-customer)#ma-name admin vlan 100 priority 7
Brocade(config-cfm-md-customer-ma-admin)#ccm-interval 100-ms
Brocade(config-cfm-md-customer-ma-admin)#mep 1 down port ethe 1/13
IEEE 802.3ah EFM-OAM
The IEEE 802.3ah Ethernet in the First Mile (EFM) is supported on the NetIron devices.
The IEEE 802.3ah Ethernet in the First Mile (EFM) standard specifies the protocols and Ethernet
interfaces for using Ethernet over access links as a first-mile technology and transforming it into a
highly reliable technology.
Using the Ethernet in the First Mile solution, the user will gain broadcast Internet access, in
addition to services, such as Layer 2 transparent LAN services, Voice services over Ethernet Access
networks, and Video and multicast applications, reinforced by security and Quality of Service
control in order to build a scalable network.
The in-band management specified by this standard defines the operations, administration and
maintenance (OAM) mechanism needed for the advanced monitoring and maintenance of Ethernet
links in the first mile. The OAM capabilities facilitate network operation and troubleshooting. Basic
802.3 frames convey OAM data between two ends of the physical link. EFM OAM is optional and
can be disabled on each physical port.
OAM initiatives are classified into three layers: transport, connectivity and service. The transport
layer is the collection of forwarding entities and interconnected segments that form a multi-hop
Ethernet network, and provide connectivity between devices. The transport layer OAM is specified
by the IEEE 802.3ah (Clause 57) and provides single-link OAM capabilities. When OAM is present,
two connected OAM sub-layers exchange protocol data units (OAMPDUs). OAM PDUs are
standard-size frames that can be sent at a maximum rate of 10 frames per second. This limitation
is necessary for reducing the impact on the usable bandwidth. It is possible to send each frame
several times in order to increase the probability of reception. A combination of the destination
MAC address, the Ethernet type/length field and Subtype allow distinguishing OAM PDU frames
from other frames.
OAM functionality is designed to provide reliable service assurance mechanisms for both provider
and customer networks.