The Generalized TTL Security Mechanism (GTSM) for the Label Distribution Protocol (LDP), August 2012
- File formats:
- PROPOSED STANDARD
- RFC 5036
- Updated by:
- RFC 7552
- C. Pignataro
- mpls (rtg)
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The Generalized TTL Security Mechanism (GTSM) describes a generalized use of a packet's Time to Live (TTL) (IPv4) or Hop Limit (IPv6) to verify that the packet was sourced by a node on a connected link, thereby protecting the router\'s IP control plane from CPU utilization-based attacks. This technique improves security and is used by many protocols. This document defines the GTSM use for the Label Distribution Protocol (LDP).
This specification uses a bit reserved in RFC 5036 and therefore updates RFC 5036. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.