I’m a Telecom/Transport technician for a major utility. I am responsible for maintaining connectivity throughout the network. We are having serious issues at two sites. In both cases, the transport equipment (digital microwave) is running clean, with no errors. The Cisco 2621 router attached via a WIC T1 card is seeing input errors, CRCs, and frame errors.The cause for this type of problem is typically found to be some sort of configuration mismatch, but I’m not trained on the TCP/IP side of the network. I have a few questions I would appreciate help on:
-When a “show interface” command is displayed, what time frame is being covered? (15 minutes, 1 hour, 1 day, etc)
-The interface shows “frame errors”. What constitutes a “frame error” in the TCP/IP world? Is it time related? Packet related?
-I have been told that errors displayed on the WIC are actually errors on Layer 2 or higher in the OSI stack. Is this true?
-The errors shown on the WIC don’t seem to be severe enough to be causing a critical slowdown of data throughput.Any suggestions as to how analyze this?
Thanks in advance for any insight you guys can provide. -Bob