Siemens S223 Operation, Administration and Maintenance OAM, OAM Loopback, Disables local OAM

User Manual	UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

7.2Operation, Administration and Maintenance (OAM)

In the enterprise, Ethernet links and networks have been managed via Simple Network Management Protocol (SNMP). Although SNMP provides a very flexible management so- lution, it is not always efficient and is sometimes inadequate to the task.

First, using SNMP assumes that the underlying network is operational because SNMP re- lies on IP connectivity; however, you need management functionality even more when the underlying network is non-operational. Second, SNMP assumes every device is IP ac- cessible. This requires provisioning IP on every device and instituting an IP overlay net- work even if the ultimate end-user service is an Ethernet service. This is impractical in a carrier environment.

For these reasons, carriers look for management capabilities at every layer of the network. The Ethernet layer has not traditionally offered inherent management capabilities, so the IEEE 802.3ah Ethernet in the First Mile (EFM) task force added the Operations, Admini- stration and Maintenance (OAM) capabilities to Ethernet like interfaces. These manage- ment capabilities were introduced to provide some basic OAM function on Ethernet media.

EFM OAM is complementary, not competitive, with SNMP management in that it provides some basic management functions at Layer 2, rather than using Layer 3 and above as required by SNMP over an IP infrastructure. OAM provides single-hop functionality in that it works only between two directly connected Ethernet stations. SNMP can be used to manage the OAM interactions of one Ethernet station with another.

7.2.1OAM Loopback

For OAM loopback function, both the switch and the host should support OAM function. OAM loopback function enables Loopback function from the user’s device to the host, which connected to the user’s device and operates it.

To enable/disable local OAM function, use the following command.

Command	Mode	Description
oam local admin enable PORTS	Bridge	Enables local OAM.
oam local admin disable PORTS		Disables local OAM.

To configure loopback function of the host connected to the switch, use the following command.

Command

oam remote loopback enable PORTS

oam remote loopback disable PORTS

oam remote loopback start PORTS

Mode

Bridge

Description

Enables loopback function of peer device.

Disables loopback function of peer device.

Operates loopback.

A50010-Y3-C150-2-7619 119