Recommended TCP/IP settings for WAN links with a MTU size

Configuring TCP MSS clamping on SRX devices to avoid Dec 30, 2015 Troubleshooting MTU Issues - Cisco Meraki MTU. The Maximum Transmission Unit (MTU) is the maximum frame size that can be sent between two hosts without fragmentation. The MX uses an MTU size of 1500 bytes on the WAN interface. When a packet is sent from a local host to a host in a remote network, … MTU Size value - Wireshark Q&A

MTU and TCP MSS - How Does Internet Work

TCP Maximum Segment Size tuning - IBM TCP path MTU discovery The TCP path MTU discovery protocol option is enabled by default in AIX. This option allows the protocol stack to determine the minimum MTU size on any network that is currently in the path between two hosts, and is controlled by the tcp_pmtu_discover=1 network option. TCP MSS, MTU and PMTU Discovery - Cisco Community Also unclear how you understand TCP MSS and its relationship to IP fragmentation. Again, sending TCP hosts can set MSS to whatever they want (i.e. up to TCP max MSS, 64 KB), but almost always they do not set MSS larger than the host's max MTU can carry within a single packet. Lastly, unclear what you mean by who/what are the two MTU liars.

Destination unreachable (Fragmentation needed) [MTU of next hop: 1446] [TCP Dup ACK 967#1] 42484 -> 443 [ACK] [TCP Retransmission] 443 -> 42484 [ACK] This traffic shows that a packet of length 1514 bytes is not being allowed to pass through the gateway.

The basics – MTU, MSS, GRE, and PMTU – Das Blinken Lichten