Status of this Memo Path MTU Discovery for IP version 6 This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards "

is described as an extension to RFC 1191 and RFC 1981, which specify ICMP-based Path MTU Discovery for IP versions 4 and 6, respectively.

A pair of IP options that can be used to learn the minimum MTU of a path through an internet is described, along with its possible uses. This is a proposal for an Experimental protocol. Distribution of this memo is unlimited.

Path MTU Discovery (PMTUD) is widely believed to be unreliable because of firewalls that discard ICMP “Packet Too Big ” messages. This paper measures PMTUD behaviour for 50,000 popular websites and finds the failure rate in IPv4 is much less than previous studies. We measure the overall failure

of this protocol. Distribution of this memo is unlimited. This document specifies the Neighbor Discovery protocol for IP Version 6. IPv6 nodes on the same link use Neighbor Discovery to discover each other’s presence, to determine each other’s link-layer addresses, to find routers, and to maintain reachability

Abstract—This paper identifies new class of network steganography methods that utilize mechanisms for handling oversized IP packets: IP fragmentation, PMTUD (Path MTU Discovery) and PLPMTUD (Packetization Layer Path MTU Discovery). In particular, for these mechanisms we propose two new

linearly with the length of the addresses when extended from 4 to 16 bytes, as mandated by the shift from IP version 4 to version 6. We present the basic structure, as well as an adaptive version that roughly doubles the number of lookups per second. More general classifications of packets that are needed

on the Internet do not work as they are supposed to do. By filtering ICMP PTB packets and IP fragments, Path MTU (PMTU) black holes can occur. The effect of these particular black holes in a networked path is that packets, that are larger than the smallest link can assimilate, are forever lost because

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, typically between routers, have certain issues regarding how large packets can be handled: whether such packets would be fragmented and reassembled (and how), whether Path MTU Discovery would be used, or how this scenario could be operationally avoided. This memo justifies why this is a common, non