> what is the best Framed-MTU for modems PPP ?
That depends on your tcp/ip stacks, modem, NAS, routers on the
path to each individual destination host, etc..... 1500 often
works well, which is why it's commonly used as a default. I think
most routers are capable of forwarding 1500-octet packets without
fragmenting them. The only other reason I can see for using an MTU
less than that is if there is heavy packet loss (as it lowers the
amount of bytes that must be retransmitted).
Last time I tried experimenting with setting MTU for modem
connections, nothing I tried worked as well as leaving it alone :-)
Stuart
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