The format of the error message is:
%SYS-5-SYS_LCPERR5: Module [dec]: Coil Pinnacle Header Checksum Error - Port #[dec]
This message indicates an error in the port ASIC. The first [dec] is the module number, and the second [dec] is the ASIC port number. This is specific to 6248 and 6348 line cards.
To determine if it is a hardware or software problem, refer to the %SYS-5-SYS_LCPERR5: Module module section of Common CatOS Error Messages on Catalyst 6000/6500 Series Switches.
If it is a hardware issue, the module needs to be replaced. If it is a software issue, an upgrade resolves the issue.
It must be carefully determined which issue is causing the error to determine the correct solution.
If the issue is not resolved, contact Cisco Technical Support using the TAC Service Request Tool.