No lights on cisco router 1711

[afidelino]

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I have a new CISCO 1711 router, and It has been working fine for a long time, however all of a sudden it seems to totally forget its config and continously reboots after which it will eventually the IOS recognizes the WIC and displays status does not remains the appropriate and therefor I will have to enter the config details again. All three lights on the outside of the WIC, LP AL CD are all blinking. All three lights blink at the same time. What would be the possible cause to this.

[Sadashiva]

router(config)#config-reg 0x2102
router(config)#end
router#wr

If you want to keep the same features as your current version, but do not know which feature set you have, issue the show version command on your router. That will save the config and load the startup config into memory, if it reboots. Really, all you needed to do instead of rewriting the entire config was

router#copy start run

Then change the config register. You can confirm that it is wrong (0x2142) by sh version---it will show what it is at the end of that output.

[semento]

Judging from the config it must be a fast ethernet. I assumed it was a serial. You have the interface settings set to auto, try hard setting interface and switch settings to full duplex 100M.Generally even if you have a hardware IOS mismatch, the WIC just sets there in the same state no mater what you do. Move it to the other slot and see if that makes a difference, or better yet try it in another router. Also, Fast ethernet 1-4 are shutdown. If this is a serial connection, do you have an external CSU/DSU? If it is an external CSU, check that the Carrier Detect (CD) light & data terminal ready (DTR) lights are on. If not, contact your provider.