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BCP 168
RFC 6398
Title: IP Router Alert Considerations and
Usage
Author: F. Le Faucheur, Ed.
Status: Best Current Practice
Stream: IETF
Date: October 2011
Mailbox: flefauch@cisco.com
Pages: 19
Characters: 44914
Updates: RFC2113, RFC2711
See Also: BCP0168
I-D Tag: draft-ietf-intarea-router-alert-considerations-10.txt
URL: http://www.rfc-editor.org/rfc/rfc6398.txt
The IP Router Alert Option is an IP option that alerts transit
routers to more closely examine the contents of an IP packet. The
Resource reSerVation Protocol (RSVP), Pragmatic General Multicast
(PGM), the Internet Group Management Protocol (IGMP), Multicast
Listener Discovery (MLD), Multicast Router Discovery (MRD), and
General Internet Signaling Transport (GIST) are some of the protocols
that make use of the IP Router Alert Option. This document discusses
security aspects and usage guidelines around the use of the current
IP Router Alert Option, thereby updating RFC 2113 and RFC 2711.
Specifically, it provides recommendations against using the Router
Alert in the end-to-end open Internet and identifies controlled
environments where protocols depending on Router Alert can be used
safely. It also provides recommendations about protection approaches
for service providers. Finally, it provides brief guidelines for
Router Alert implementation on routers. This memo documents an Internet
Best Current Practice.
This document is a product of the Internet Area Working Group Working Group of the IETF.
BCP: This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
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