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..?