Recovery EPROM Cookie on Router 1711

[ntmanjunath]

>>rommon 1 > cookie

>>WARNING: Cookie information is corrupt

>>

>>cookie:

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

>>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

How to fix this problem? What is the command for restoring these cookies back?

[Peter Paluch]

Hello,

The cookie contains vital information about your router including some very specific hardware settings, base MAC address and other data. Unfortunately, there is no command to replace it automatically, rather it has to be refilled with sensible data again.

It would be the best to find another working 1711 router and take its cookie value as an template. The MAC address would need to be located in the cookie and replaced with new unique value and then restored into the failed router. There is a procedure to do it from the ROMMON but I would rather not talk about it right now as it would be possible to "brick" your router completely. However, please do try to obtain the cookie from another working 1711 router. WIthout it, it may be impossible to recover your router.

Best regards,

Peter

[Daniel Vieceli]

Hi, My cookie MAC has FFFFFF and password don't match
can help me?

cookie:
04 ff 09 86 ff ff ff ff ff ff ff ff ff ff ff ff
4f 43 31 31 31 37 33 38 46 50 40 04 0c 41 07 00
82 49 1f fe 07 42 41 30 c0 46 03 20 00 5b 8b 05
88 00 00 00 00 02 04 c6 8a 49 50 4d 37 56 30 30

[Mithrilhall]

This has worked for me in the past with 1711 routers.

From rommon paste in the following:
priv
0000
cookie
01
01
00 0e 84 df 1f 28
33
00
01
ff
04 48
00 11
00 00 00 00 00 00 00 00
46 4f 43 07 52 32 44 5a ff ff ff
46 01
00 00 00 00 00 00 00 00
04
ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
reset

[paolo bevilacqua]

Be advised thar even with the correct programming information, the hardware itself can be faulyt, and nothing can be done to restore it.