The dir command will not list these secured files, because the IFS shields the secured files from being listed in a directory output.
There is no restriction in the ROM monitor (ROMMON) mode, and files can be listed and used to boot from the secured files. display the IOS resilience configuration and the primary bootset filename, use the show secure bootset command to verify
archive existence.
Cisco Discovery Protocol (CDP)
CDP is a Cisco proprietary protocol for device discovery (media and protocol independent) that runs over OSI Layer 2 (the data
link layer) on most Cisco devices (routers, bridges, access and communication servers, and switches). CDP displays information
about other directly connected Cisco devices. Network management applications and intruders can map the network and retrieve
valuable information of neighboring Cisco devices leveraging CDP.
CDP is enabled by default at the global level and on each supported interface to send and receive CDP information. However, some interfaces, CDP is disabled by default (for example, on async interfaces).
CDP can be disabled globally for the device or on selected interfaces. The no cdp run command from the global configuration
mode can be used to disable CDP for the entire device, as shown in Example 3-5 .
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