4. 更新的 RFC

以下 RFC 包含对"reserved labels"一词的引用:

• [RFC3032], "MPLS Label Stack Encoding"
• [RFC3038], "VCID Notification over ATM link for LDP"
• [RFC3209], "RSVP-TE: Extensions to RSVP for LSP Tunnels"
• [RFC3811], "Definitions of Textual Conventions (TCs) for Multiprotocol Label Switching (MPLS) Management"
• [RFC4182], "Removing a Restriction on the use of MPLS Explicit NULL"
• [RFC4928], "Avoiding Equal Cost Multipath Treatment in MPLS Networks"
• [RFC5331], "MPLS Upstream Label Assignment and Context-Specific Label Space"
• [RFC5586], "MPLS Generic Associated Channel"
• [RFC5921], "A Framework for MPLS in Transport Networks"
• [RFC5960], "MPLS Transport Profile Data Plane Architecture"
• [RFC6391], "Flow-Aware Transport of Pseudowires over an MPLS Packet Switched Network"
• [RFC6478], "Pseudowire Status for Static Pseudowires"
• [RFC6790], "MPLS Entropy Labels"

所有此类引用都应理解为"special-purpose labels".