5-9
z
Ethernet OAM remote loopback is available only after the Ethernet OAM connection is established
and can be performed only by the Ethernet OAM entities operating in active Ethernet OAM mode.
z
Remote loopback is available only on full-duplex links that support remote loopback at both ends.
z
Ethernet OAM remote loopback needs the support of the peer hardware.
z
Enabling Ethernet OAM remote loopback interrupts data communications. After Ethernet OAM
remote loopback is disabled, all the ports involved will shut down and then come up. Ethernet
OAM remote loopback is disabled when you execute the
undo oam enable
command to disable
Ethernet OAM, when you execute the
undo
oam loopback
command to disable Ethernet OAM
remote loopback, or when the Ethernet OAM connection times out.
z
Ethernet OAM remote loopback is only applicable to individual links. It is not applicable to link
aggregation member ports. In addition, you cannot assign ports where Ethernet OAM remote
loopback is being performed to link aggregation groups. For more information about link
aggregation groups, refer to
Link Aggregation Configuration
in the
Access
Volume
.
z
Enabling internal loopback test on a port in remote loopback test can terminate the remote
loopback test. For more information about loopback test, refer to
Ethernet Interface Configuration
in the
Access Volume
.
Displaying and Maintaining Ethernet OAM Configuration
To do…
Use the command…
Remarks
Display global Ethernet OAM configuration
display oam configuration
Display the statistics on critical events
after an Ethernet OAM connection is
established
display oam critical-event
[
interface
interface-type interface-number
]
Display the statistics on Ethernet OAM link
error events after an Ethernet OAM
connection is established or after you
clear the statistics
display oam link-event
{
local
|
remote
} [
interface interface-type
interface-number
]
Display the information about an Ethernet
OAM connection
display oam
{
local
|
remote
}
[
interface interface-type
interface-number
]
Available
in any
view
Clear statistics on Ethernet OAM packets
and Ethernet OAM link error events
reset oam
[
interface interface-type
interface-number
]
Available
in user
view only
Ethernet OAM Configuration Example
Network requirements
z
Enable Ethernet OAM on Device A and Device B to auto-detect link errors between the two
devices.
z
Monitor the performance of the link between Device A and Device B by collecting statistics about
the error frames received by Device A..
