I was wondering if anyone might have any advice.
I have a remote site that i've configured for Frame Relay. (it is a standard DS1 over a channalized DS3 back to a cisco 8510 with a frame relay DS3 adapter.)I noticed that if I send standard ICMP packet accross the serial interface I get "normal" response times. But once I start sending larger packets accross the line, my ping times increase exponentially. Just so happens that if I send packets 128 bytes or less, ping times are fine, 129bit packets and my ping times double, 257 bytes or higher and my ping times double again. 1500 bytes and my ping times are really bad. My MTU is set for 1500 byte packets.
My thought was packets are possibly fragmenting.
I don't know if this is enough information but any thoughts?
Any advise would be greatly appreciated.