153
Setting the clock mode on a copper SyncE GE port
By default, a copper SyncE GE port automatically negotiates its clock mode with the remote end. To
avoid a negotiation result that conflicts with your clock synchronization trail design, manually set the
clock mode.
•
To derive timing from the upstream clock, set the clock mode to slave.
•
To provide timing for the downstream clock, set the clock mode to master.
To set the clock mode on a copper SyncE GE port:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 3 Ethernet
interface view.
interface
interface-type
interface-number
N/A
3.
Set the clock mode.
synce state
{
master
|
slave
}
By default, the clock mode is
automatically negotiated.
Displaying and maintaining SyncE
Execute
display
commands in any view.
Task Command
Display ESMC information.
display esmc
[
interface
interface-type interface-number
]
SyncE configuration example
Network requirements
As shown in
, configure SyncE between the devices.
Figure 50
Network diagram
Configuration procedure
# On Device A, enable the synchronous mode and ESMC on GigabitEthernet 2/0/1.
<DeviceA> system-view
[DeviceA] interface gigabitethernet 2/0/1
[DeviceA-GigabitEthernet2/0/1] synchronous mode
[DeviceA-GigabitEthernet2/0/1] esmc enable
[DeviceA-GigabitEthernet2/0/1] quit