SONET/SDH Path Trace Identifier Overview
The SONET/SDH path trace identifier is a text string that identifies the circuit. If the string contains spaces, enclose it in quotation marks.
By default, the Junos OS uses the router and interface names for the path trace identifier. Depending on the router and interface names, the default path trace identifier might be longer then 16 bytes. The SDH standards define a maximum 16-byte path trace. For this reason, the default path trace identifier might be truncated in SDH mode. You can prevent the path trace identifier from being truncated in SDH mode by configuring a path trace identifier that is under 16-bytes long. In SONET mode, a path trace identifier can be up to 64-bytes long.
For DS3 channels on a channelized OC12 interface, you can configure a unique path trace for each of the 12 channels. Each path trace can be up to 16 bytes. For channels on a channelized OC12 intelligent queuing (IQ and IQE) interface, each path trace can be up to 64 bytes.