Computer network protocol to determine the maximum size of packets to transmit
Path MTU Discovery (PMTUD) is a standardized technique in computer networking for determining the maximum transmission unit (MTU) size on the network path between two Internet Protocol (IP) hosts, usually with the goal of avoiding IP fragmentation. PMTUD was originally intended for routers in Internet Protocol Version 4 (IPv4).[1] However, all modern operating systems use it on endpoints. In IPv6, this function has been explicitly delegated to the end points of a communications session.[2]
As an extension to the standard path MTU discovery, a technique called Packetization Layer Path MTU Discovery works without support from ICMP.[3]
^J. Mogul; S. Deering (November 1990). Path MTU Discovery. Network Working Group. doi:10.17487/RFC1191. RFC 1191. Draft Standard. Obsoletes RFC 1063.
^J. McCann; S. Deering; J. Mogul (July 2017). R. Hinden (ed.). Path MTU Discovery for IP version 6. IETF. doi:10.17487/RFC8201. STD 87. RFC 8201. Internet Standard 87. Obsoletes RFC 1981.
^G. Fairhurst; T. Jones; M. Tüxen; I. Rüngeler; T. Völker (September 2020). Packetization Layer Path MTU Discovery for Datagram Transports. IETF. doi:10.17487/RFC8899. ISSN 2070-1721. RFC 8899. Proposed Standard. Updates RFC 4821, 4960, 6951, 8085 and 8261.
and 27 Related for: Path MTU Discovery information
PathMTUDiscovery (PMTUD) is a standardized technique in computer networking for determining the maximum transmission unit (MTU) size on the network path...
by IPv6, but hosts are "strongly recommended" to use PathMTUDiscovery to take advantage of MTUs greater than the minimum. Since July 2017, the Internet...
equal to the MTU of the first hop of the source-destination pair. The second is to run the PathMTUDiscovery algorithm to determine the pathMTU between two...
cause problems for the automatic pathMTUdiscovery, where the maximum transmission unit (MTU) size on the network path between two IP hosts is established...
following: perform PathMTUDiscovery, perform end-to-end fragmentation, or send packets no larger than the default maximum transmission unit (MTU), which is...
the maximum transmission unit (MTU) size of the local link and PathMTUDiscovery can be used for the entire intended path to the destination. The IPv4...
forwarding, but the MTU supported by a specific path must still be established, to avoid packet loss. For this, PathMTUdiscovery is used between endpoints...
unit (MTU) of link elements. However, this feature has been dropped in IPv6, as the communications end points, the hosts, now have to perform pathMTU discovery...
resources to perform reassembly of fragments. It can also be used for pathMTUdiscovery, either automatically by the host IP software, or manually using diagnostic...
fragmented set of packets. Alternatively, the originating host may perform pathMTUDiscovery to determine the packet size that can be transmitted without fragmentation...
Optional parameters: none The PAD chunk was introduced to facilitate pathMTUdiscovery, by enabling a sender to arbitrarily increase the size of an SCTP...
IPv4-fragmentation transparency: with this feature, support of the pathMTUDiscovery of RFC 4821, recommended in RFC 6349, is preserved. Without it, wherever...
dynamically adds and removes device nodes, allows accessing devices by connection paths, recognises drives by serial numbers and removes the need for pre-populated...
unit (MTU) size of the data link layer of the networks to which the sender and receiver are directly attached. TCP senders can use pathMTUdiscovery to...
on high-RTT links, when multiple losses per window are possible. PathMTUDiscovery avoids the need for in-network fragmentation, increasing the performance...
McCann, J.; Deering, S.; Mogul, J. (July 2017). Hinden, R. (ed.). PathMTUDiscovery for IP version 6. p. 19. doi:10.17487/RFC8201. RFC 8201. "Steve Deering...
packet-size smaller than the selected MTU, and there is no further fragmentation en route. This solution, called PathMTUDiscovery, allows a sender to fragment/segment...
ransomware from getting a foothold in the first place. MTU black-hole detection and pathMTUdiscovery (PMTUD) is the processes by which the ONTAP system...
a relatively difficult, and somewhat lengthy, process to increase the pathMTU of high-performance national research and education networks from 1500...
(HVPLS), it introduces a new type of MPLS device: the multi-tenant unit (MTU) switch. This switch aggregates multiple customers into a single PE, which...
Neighbor Discovery Protocol (NDP) is a node discovery protocol based on ICMPv6 which replaces and enhances functions of ARP. Secure Neighbor Discovery (SEND)...
used in relation to methods of learning, discovery, or problem solving. Routing is the process of selecting paths to specific destinations. Heuristic routing...
Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into...
from a formula of five variables: bandwidth, delay, reliability, load, and MTU; though on Cisco routers, by default, only bandwidth and delay are used in...
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