Even though if one of these sections (Frame Frame Relay Link Is Down,Frame Relay Cannot ping Remote Router,Frame Relay Cannot ping End to End)in the link above fits to my case , it could have been related to one of the remote site, but not all remote sites.
Because i have got problem with all remote sites, not only one of them.
As I mentioned before, the link is for your reference to understand the congetion of FR. If we do not have more info., we cannot provide suggestion to you. Slow performance may be caused by routing protocol, hardware issue, CPU loading, etc.
You can also try to search Cisco web that there are a few articles related to the performance issue.
Please provide more info. w/ network diagram, router config, interface status and running application (or what application is slow). No of users is not the major factors, if the link is overloaded but application require high bandwidth, even one user may still think it is slow.
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