Settings reset after a power loss


R

rajil_s

Network Guru
Member
Hi all,

I have a WRT54GL running remotely with a 1.23 version of tomato firmware. Today morning after a power loss (electricity cuts are frequent here) the router lost all its configuration settings. It is the first time it has happened on a tomato firmware, I had issues like this with ddwrt before.

Fortunately, I had a backup of the settings and restored it. However, i was wondering if anybody come across anything like this before. Is this a bug in the old firmware?

Thanks,
Rajil
 
Not good. Does that pose any kind of security risk? Basically does it lose the settings for wireless security settings in place? We lost power this week on a certain day. No loss of router settings both times with Tomato. Twice with in a hour period. Guess they was working on some thing early in the morning.

bripab007 said:
This is something that happens to WRT54G-series routers sometimes. I've seen an old WRT54G ver 2.0 running Tomato do it, a newer WRT54G ver 6.0 running DD-WRT do it and, most recently, a WRT54G-TM running Tomato do it.
Click to expand...
 
there is a settting in Administration > Debugging make sure the box "Avoid performing an NVRAM commit" is un-checked.


rajil_s said:
Hi all,

I have a WRT54GL running remotely with a 1.23 version of tomato firmware. Today morning after a power loss (electricity cuts are frequent here) the router lost all its configuration settings. It is the first time it has happened on a tomato firmware, I had issues like this with ddwrt before.

Fortunately, I had a backup of the settings and restored it. However, i was wondering if anybody come across anything like this before. Is this a bug in the old firmware?

Thanks,
Rajil
Click to expand...
 
How does that help the situation? I thought that was for testing things if you do not want to make actual changes? I could be wrong though.....?

markbto said:
there is a settting in Administration > Debugging make sure the box "Avoid performing an NVRAM commit" is un-checked.
Click to expand...
 
It doesn't help the situation.

All WRT54 can exhibit this behavior. It has nothing to do with Tomato. You can reproduce it easily by cutting power, then restoring power, and then cutting again while the router is rebooting. The answer is to use a UPS, or battery on float charge, to power your router(s). If you have a big installation a central UPS will easily power all your routers and AP's and probably an admin PC too.

If you don't want the expense of a UPS, I found that adding a 4700 MFD capacitor as a reservoir inside the WRT case across the power pins seemed to help (the OEM PSU has very little smoothing. The commonly supplied PSU is just a transformer with overheat cutout, a bridge rectifier, and a reservoir capacitor. I forget the value, but it's quite small).
 
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