Frame-relay packet drops

[Guest_imported]

Hello everybody,

First ecxuse me for my English. Between two cisco routers, i have an Frame-Relay tunnel over multiple E1 links. It seems that whenever i ping packets with a size smaller than 468 bytes, there's no problem. When i increase the size my packets get lost, untill i have a size of nx486 bytes (n=1,2,3..), my success rate is 100% again. When i make the connection over one E1 link, my problem is also solved.
Anybody an idea?
Any help is very appreciated
My thanks in advance

 

[DanielBowen]

Check interface stats to see if either interface has recorded any runt frames !

 

[ckern]

Can you be more specific about the multiple E1 links, and how they are joined??