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got me thinking in the right direction...
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got me thinking in the right direction...

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Hi<br />
<br />
We're experiencing some wierdness with our network - a brief overview;<br />
<br />
We have 2 sites (within 50 miles) using the same ISP, same firewall hardware. &nbsp;MTU's on each device (switch, firewall etc) is set to 1500 but when we perform ping IP -f -l MTU we get fragmented packets for any MTU value over 1272.<br />
<br />
Also, all sites we communicate with (32 sites worldwide) we're gettig the same response with over MTU 1272.<br />
<br />
Is this normal? Should we be shouting at the ISP?<br />
<br />
Clearly if the MTU is low, then we're getting less for our buck..?<br />
<br />
Thanks
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Hi

We're experiencing some wierdness with our network - a brief overview;

We have 2 sites (within 50 miles) using the same ISP, same firewall hardware.  MTU's on each device (switch, firewall etc) is set to 1500 but when we perform ping IP -f -l MTU we get fragmented packets for any MTU value over 1272.

Also, all sites we communicate with (32 sites worldwide) we're gettig the same response with over MTU 1272.

Is this normal? Should we be shouting at the ISP?

Clearly if the MTU is low, then we're getting less for our buck..?

Thanks

Ethernet Circuit MTU

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.