…ch the ICMP messages never return to the source due to policy-based filtering [ RFC2923 ]. PLPMTUD requires a separate, direct control channel from the egress to the ingress that provides positive feedback; the direct channel is not blocked by policy filters and the positive feed…
…P Packet Too Big (PTB) messages are not delivered or processed for some reason [RFC2923]. With PLPMTUD, classical Path MTU Discovery can be modified to include additional consistency checks without increasing the risk of connection hangs due to spurious failures of the additional…
…PTB messages are not sent back to the sender for some reason (for example, see [RFC2923]). Examples of where PTB messages are not delivered include the following: * The generation of ICMP messages is usually rate limited. This could result in no PTB messages being generated to th…
…hen data is transferred. This state is referred to as a black-hole connection [ RFC2923 ]. Path MTU Discovery relies on ICMPv6 Packet Too Big (PTB) to determine the MTU of the path. An extension to Path MTU Discovery defined in this document can be found in [ RFC4821 ]. RFC 4821 …
…et Too Big error messages. Such packet drops will result in PMTUD black holes [ RFC2923 ], which can only be overcome with Packetization Layer Path MTU Discovery (PLPMTUD) [ RFC4821 ]. 8 . Security Considerations The use of stateless IP/ICMP translators does not introduce any new…
…et Too Big error messages. Such packet drops will result in PMTUD black holes [ RFC2923 ], which can only be overcome with Packetization Layer Path MTU Discovery (PLPMTUD) [ RFC4821 ]. 8 . Security Considerations The use of stateless IP/ICMP translators does not introduce any new…
…ols for this purpose. Various weakness in the current methods are documented in RFC2923 , and have proven to be a chronic impediment to the deployment of new technologies that alter the path MTU, such as tunnels and new types of link layers. The proposed new method does not rely …