port clock-mode slave

Function

The port clock-mode slave command sets the clock negotiation mode of an XGE electrical interface to the slave mode.

The undo port clock-mode slave command restores the clock negotiation mode of an XGE electrical interface to the auto-negotiation mode.

By default, the clock negotiation mode of an XGE electrical interface is the auto-negotiation mode.

Only the XGE electrical interfaces of the ES5D21X08T00 cards support this command.

Format

port clock-mode slave

undo port clock-mode slave

Parameters

None

Views

XGE interface view, port group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a modern communications network, most telecommunications services require that the frequency offset or time difference between devices be in an acceptable range. When an XGE electrical interface on an ES5D21X08T00 card of a Huawei device connects to a non-Huawei device, the clock negotiation mode of the XGE electrical interface on the local device is auto-negotiation by default. The two devices determine the master/slave relationship based on the negotiation result and perform network clock synchronization. When the local device negotiates to become the master device, the interfaces on both ends may fail to go Up or their rate may decrease due to the impact of the non-Huawei device. In this case, run the port clock-mode slave command to set the clock negotiation mode of the XGE electrical interface of the local device to the slave mode. This configuration ensures clock synchronization between the two devices.

Precautions

If the interfaces on both ends are configured to work in slave mode, clock negotiation will fail and the interfaces cannot go Up.

Example

# Set the clock negotiation mode of an XGE electrical interface to slave.

<HUAWEI> system-view
[HUAWEI] interface XGigabitEthernet 0/0/1
[HUAWEI-XGigabitEthernet0/0/1] port clock-mode slave