flag (10G WAN interface view)

Function

The flag command configures overhead bytes to be added to the packet on a 10GE WAN interface.

The undo flag command restores the default setting.

By default,values of j1 and j0 on a 10GE WAN interface are empty. The value of c2 on a 10GE WAN interface is 0x1a, in hexadecimal notation.

This command is supported only on the NetEngine 8000 F1A.

Format

flag j0 1byte-mode 1byte-value

flag j1 1byte-mode 1byte-value

flag j0 16byte-mode 16byte-value

flag j0 64byte-or-null-mode [ 64byte-value ]

flag j1 16byte-mode 16byte-value

flag j1 64byte-or-null-mode [ 64byte-value ]

undo flag

undo flag j0

undo flag j1

Parameters

Parameter	Description	Value
1byte-value	Specifies the value of the j0 or j1 byte when the 1byte-mode mode is used.	The value is an integer that ranges from 0 to 127.
j1	Indicates the higher-order VC-N path trace byte. It is a higher-order path overhead byte for identifying a higher-order path access point. Like sending the J0 byte, a sender sends this byte periodically to keep the connection with a receiver.	-
1byte-mode	Indicates that the frame format is 1-byte.	-
j0	Indicates the regenerator section trace byte. It is a section overhead byte for identifying a section access point. A sender sends this byte periodically to keep the connection with a receiver.	-
16byte-mode	Indicates that the frame format is 16-byte.	-
16byte-value	Specifies the value of the j0 or j1 byte when the 16byte-mode mode is used.	The value is a string of 1 to 15 characters.
64byte-or-null-mode	Indicates the frame format, which can be 64-byte or null.	-
64byte-value	Specifies the value of the j0 or j1 byte when the 64byte-or-null-mode mode is used.	The value is a string of 1 to 62 characters or null.

Views

10G WAN interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
device-mgr	write

Usage Guidelines

Usage Scenario

SDH frames contain various overhead bytes that are used to implement operation and maintenance functions such as hierarchical management of SDH transport networks. J0 and J1 are used for interoperability between devices of different countries, regions, or manufacturers.

Configuration Impact

On a carrier's network, the J0 byte can be any character; at the border between networks managed by different carriers, the J0 bytes on the sender and receiver must be identical. J0 helps locate and rectify faults in advance and reduces the network recovery time.

Precautions

C2 and J1 bytes on the sender and receiver must be identical.

Example

# Set the J1 byte to HUAWEI on the 10GE WAN interface 0/1/0.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] flag j1 16byte-mode HUAWEI