I am receiving Input and CRC errors on a remote router serial interface when a user is trying to save an Exel file. I have loacally looped backed both ends with no errors. I have verified switch port settings and tested all cables. The Telco claims it can find no problems with the line. The local router is a 2610 and the remote is a 7507. Encapsulation is HDLC. Should I adjust the MTU size on the serial interfaces? Any other suggestions before I start swapping
Are you stating that the CRC errors are only on one end of the WAN circuit? If so, the TELCO may have a problem at the biscuit block. I would again have the TELCO test beyond their NIU (network interface unit) to your CSU/DSU. Also, I've experienced an odd problem associated with saving large files and the problem was that I was bridging and routing yet hadn't configured intergrated bridging and routing.
Yes I am only getting CRC errors on one end and only when an attempt s made to save this particular Execl file. I have looped back my CSU and serial interfaces on both ends with no errors on several bit patterns. I also increased MTU size on serial interfaces but this made no difference. I guess it is back to having the telco test again and maybe replacing some NIC's in a few PC's.
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