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Monthly Archives: May 2012

What does “SEP” means @ Cisco Ephones…


today i asked myself what does SEP followed by the mac address from the Cisco ephone means?

Secure EPhone?
Secure Enhanced Ephone?

… no – searched on the internet and found following anser…

“Cisco acquired SCCP technology when it acquired Selsius Corporation in 1998.[2] As a remnant of the Selsius origin of the current Cisco IP phones, the default device name format for registered Cisco phones with CallManager is SEP — as in Selsius Ethernet Phone — followed by the MAC address. Cisco also has marketed a Skinny-based softphone called Cisco IP Communicator.”

External Link: http://en.wikipedia.org/wiki/Skinny_Call_Control_Protocol#Origin

[best regs]


CISCO IOS Recovery 3750X and 3560X with USB flash drive

Today i get a call from a customer that he had deleted the whole flash from his 3560X switch and when he restarted the switch it won’t come up… why? 😉

so i told him that without the .bin image on the flash it’s not possible that the switch will run…

What can i do?

You can do an IOS recovery… but not with the very slow xmodem  (i know you can tune it up to !WOW! 115kbps)… but nowadays with an USB flash drive…

Here you can see how it works:

NOTE: Not all USB flash drives are supported, hence my recommendation to get several ready.

1. USB pen drive max. 16GB format as FAT16
2. copy the .bin image onto the flash drive
3. disconnect the switch from power
4. connect the flash drive to the switch
5. hold the “mode” button on the switch, give power, hold the button until the SYST LED flashes only green fast and when it is green and stop flashing hold on 2 seconds and then leave the button, otherwise it will boot “normaly”  (takes about ca. 30-40 seconds)
6. switch: flash_init
7. …wait… (it could be that the switch will hang on —more— push enter and it will go on, try it)
8. switch: dir usbflash0:       !!check if the switch can read from USB
9. switch: copy usbflash0:IOS-IMAGE.bin flash: IOS-IMAGE .bin        !!copy the image from usb to flash
10. switch: boot flash: IOS-IMAGE .bin        !! with this command the switch boots up with the image immediately
11. conf t      !! enter to conf t
12. boot system flash:.bin      !! don’t forget to set the image as bootvar 😉
13. wr mem       !! and save it, so it will boot also when it get powered off 😉

I tried it also to recover the IOS image with TFTP via the management port… but it doesn’t worked for me… it get not up the management port, so i couldn’t copy the file from TFTP to FLASH…

[best regs]

Hi Cisco Guys…

hi cisco guys…

i’m new on wordpress and i’ll use it to document my works and projects with Cisco products. My focus will be on Cisco Wireless, Cisco ASA and Cisco Routing & Switching – but not only…

I’ll hope to find enough time to write down all my interesting projects…

best regs