Flag Vc-4; Frame-Format - HP 6600 Command Reference Manual

<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0] flag vc-3 2 c2 2

flag vc-4

Use flag vc-4 to set an overhead byte for VC-4 frames.
Use undo flag vc-4 to restore the default.
Syntax
flag vc-4 path-number { c2 c2-value | j1 { sdh sdh-string | sonet sonet-string } | s1s0 s1s0-value }
undo flag vc-4 path-number { c2 | j1 { sdh | sonet } | s1s0 }
Views
CPOS interface view
Default command level
2: System level
Parameters
path-number: Number of a channel in VC-4.
c2-value: Path signal label byte, in the range of 0x00 to 0xFF.
sdh-string: Higher order path trace byte for SDH frames, a string of 1 to 15 characters.
sonet-string: Higher order path trace byte for SONET frames, a string of 1 to 62 characters.
s1s0-value: AU/TU type indicator.
Usage guidelines
A rich set of overhead bytes are available to implement operation and maintenance (OAM) functions
such as hierarchical management of transmission networks for SONET/SDH frames.
Among these overhead bytes, J1 and C2 are higher-order path overhead bytes. The J1 byte is used for
detecting the continuity of the connection between two interfaces at the path layer. The C2 byte is used
for indicating the multiplexing structure of a VC frame and the property of payload. The J1 and C2 bytes
are mainly used for interoperability between devices from different countries, areas, and vendors.
Examples
# Set the J1 byte to abcd for VC-4 frames on channel 1 of VC-4 on interface CPOS 2/0/0 in SDH mode.
<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0] flag vc-4 1 j1 sdh abcd

frame-format

Use frame-format to configure the framing format on the CPOS interface.
Use undo frame-format to restore the default.
Syntax
frame-format { sdh | sonet }
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