RFC 6720

"The Generalized TTL Security Mechanism (GTSM) for the Label Distribution Protocol (LDP)", August 2012

Canonical URL:

http://www.rfc-editor.org/rfc/rfc6720.txt
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Status:

PROPOSED STANDARD

Updates:

RFC 5036

Authors:

C. Pignataro
R. Asati

Stream:

IETF

Source:

mpls (rtg)

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Abstract

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 Stream, see RFC 4844.