RFC 8201 IPv6 Path MTU Discovery July 2017 1.Introduction When one IPv6 node has a large amount of data to send to another node, the data is transmitted in a series of IPv6 packets. These packets can have a size less than or equal to the Path MTU (PMTU). Alternatively, they can be larger packets that are fragmented into a series of fragments each with a size less than or equal to the PMTU.

CellStream - IPv4/IPv6 Path MTU (PMTU) Discovery Demystified sudo sysctl -w net.ipv4.tcp_mtu_probing=1. You can then explorte what happens in Wireshark. My understanding from reading the Ubuntu docs on this is that whatever you have set for the IPv4 probing, the IPv6 stack mimicks the setting. Another thing you may be interested in is the amout of time the MTU setting is kept in the cache. OpenWrt Project: IPv6 The default firmware provides full IPv6 support with a DHCPv6 client (odhcp6c), an RA & DHCPv6 Server Automatic detection of announced prefixes, delegated prefixes, default routes and MTU. Change detection for prefixes and routes triggering resending of RAs and DHCPv6-Reconfigure. IETF | IPv6 is an Internet Standard Path MTU discovery for IPv6 (PMTUD) was also published alongside RFC8200/STD86 as RFC 8201/STD87. This version has been greatly revised based on deployment feedback acknowledging the relative fragility of ICMPv6 based mechanisms due to filtering on the Internet as well as incorporating extensive review and input from the IETF Transport Area.

Solved: Vlan mtu, and ipv6 mtu. - J-Net Community

Alternately, configure your entire LAN for a smaller MTU (not really advised!) If your router provides IPv6 for you, see if you can configure a smaller MTU to be advertising with (perhaps) RADVD. Apple Airport routers: Automatically send ICMPv6 redirects to your hosts, telling them to reduce the path MTU to 1280. Fixing an old hack - why we are bumping the IPv6 MTU

Path MTU Discovery - Wikipedia

RFC 8201 - Path MTU Discovery for IP version 6 RFC 8201 IPv6 Path MTU Discovery July 2017 1.Introduction When one IPv6 node has a large amount of data to send to another node, the data is transmitted in a series of IPv6 packets. These packets can have a size less than or equal to the Path MTU (PMTU). Alternatively, they can be larger packets that are fragmented into a series of fragments each with a size less than or equal to the PMTU. RFC 1981 - Path MTU Discovery for IP version 6 RFC 1981 Path MTU Discovery for IPv6 August 1996 address - an IPv6-layer identifier for an interface or a set of interfaces. packet - an IPv6 header plus payload. link MTU - the maximum transmission unit, i.e., maximum packet size in octets, that can be conveyed in one piece over a link.