![]() ![]() It had enough of a linux shell to allow me to adjust the MTU on the ethernet interface via the CLI. To verify that the MTU size is the real issue I performed an experiment on the appliance I was troubleshooting. ![]() I have a call with the appliance maker tomorrow to let them know- seems like their appliance should be able to respect this message! For some reason the appliance does not respect this request. One thing that this traffic does not do a great job of showing is that the Don't Fragment flag is set on the IP Packet which is what causes the router to come back and tell the appliance to fragment the message. Drilling into the ICMP traffic further shows a Type 3, Code 4 message which indicates that the next hop has a maximum MTU of 1446. This traffic shows that a packet of length 1514 bytes is not being allowed to pass through the gateway.
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