When a router crashes, it is sometimes useful to obtain a full copy of the memory image (called a core dump) to identify the cause of the crash. Core dumps are generally very useful to your technical support representative.
Four basic ways exist for setting up the router to generate a core dump:

• Using Trivial File Transfer Protocol (TFTP)
• Using File Transfer Protocol (FTP)
• Using remote copy protocol (rcp)
• Using a Flash disk