Label Description

Packets travelling along an LSP are identified by a label, a 20-bit, unsigned integer in the range 0 through 1048575:

• 0 through 15—Reserved and have special semantics.
• 16 through 1,023 and 10,000 through 99,999—Unused and unassigned by the software, a feature that is specific to the JUNOS software. You can use labels to manually configure static LSPs and to ensure that there are no conflicts with labels that are dynamically assigned by the software.
• 1,024 through 9,999—Reserved for future applications.
• 100,000 through 1,048,575—Automatically negotiated, assigned, released, and reused by the software. Typically, per-box labels are assigned in the 100,000-799,999 range, and per-interface labels are assigned in the 800,000-1,048,575 range.