When the 2811 router is turned OFF and ON it does auto boot correctly every time. No problem there.
But when there is a power failure / power recovery the router goes and sits at ROMMON prompt.
I have to find out the config-reg values etc. but I can't believe problem to be with config-reg because customer tells me that it boots everytime fine when router power is turned OFF and then ON. The problem is just after power outage. I can't see the difference.
Customer said that he found a Field Notice (I am still searching for that Field Notice) where the solution to this problem is to upgrade the ROMMON which he has done but he still has the same problem even after upgrading teh ROMMON.