Flag - H3C SR8800 Command Reference Manual

flag

Syntax
flag c2 flag-value
undo flag c2
flag { j0 | j1 } { sdh | sonet } flag-value
undo flag { j0 | j1 } { sdh | sonet }
View
ATM main interface view
Default level
2: System level
Parameters
c2 flag-value: Path signal flag byte, a higher-order path overhead byte that indicates the multiplex
structure of virtual container (VC) frames and property of payload. It is a hexadecimal number in the
range of 0 to FF.
j0 flag-value: Regeneration section trace message, a section overhead byte that tests continuity of the
connection between two interfaces at the section level. If the sdh keyword is configured, the flag-value
argument is a string of 1 to 15 hexadecimal digits. If the sonet keyword is configured, the argument is a
hexadecimal number in the range of 0 to FF.
j1 flag-value: Path trace message, a higher-order path overhead byte that tests continuity of the
connection between two interfaces at the path level. If the sdh keyword is configured, the flag-value
argument is a string of 1 to 15 hexadecimal digits. If the sonet keyword is configured, the argument is a
string of 1 to 62 characters.
sdh: Sets framing format to Synchronous Digital Hierarchy (SDH).
sonet: Sets framing format to Synchronous Optical Network (SONET).
Description
Use the flag command to set the SONET/SDH overhead bytes.
Use the undo flag command to restore the default.
By default, the default SDH overhead bytes are used.
The default overhead bytes are as follows.
c2: 0x13
•
• j0 (SDH): Null
j1 (SDH): Null
•
Inconsistency between the c2 and j1 settings of the sending end and those of the receiving end causes
alarms.
The j0 byte can be any character in the network of the same carrier. If networks of two carriers are
involved, the sending and receiving routers at network borders must use the same j0 byte. With the j0
byte, operators can detect and troubleshoot faults in advance or use less time to recover the networks.
The inconsistent j0 byte settings at the sending and receiving ends cause alarms in SDH frames but do
not in SONET frames.
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