This command is mostly used when you are speaking with Cisco TAC. It displays a lot of information about your device.
Below is an example of show tech-support.
—————— show version ——————
Cisco IOS Software, 3600 Software (C3640-JK9S-M), Version 12.4(16), RELEASE SOFTWARE (fc1)
ROM: ROMMON Emulation Microcode
R2 uptime is 19 minutes
This product contains cryptographic features and is subject to United
A summary of U.S. laws governing Cisco cryptographic products may be found at:
If you require further assistance please contact us by sending email to
Cisco 3640 (R4700) processor (revision 0xFF) with 124928K/6144K bytes of memory.
Configuration register is 0x2102
—————— show running-config ——————
Current configuration : 1336 bytes
—————— show crypto ipsec profile ——————
—————— show crypto isakmp sa ——————
dst src state conn-id slot status
—————— show crypto engine connection active ——————
ID Interface IP-Address State Algorithm Encrypt Decrypt
—————— show crypto ipsec sa ——————
No SAs found