I have a 3640 which has two images in the flash. The first image has a problem, and the router hangs after decompressing the image. The second image boots, but due to a configuration problem, continuously recycles the router (I cannot even get to the password screens - it reboots before that).
When I use confreg 0x2142, it tries to boot the first image, which does not work. Is there a way to get rid of this image from ROMMON?
I assume you are using 0x2142 to bypass NVRAM and hence be able to boot the good image without it recycling the router due to the config problem you have, but it keeps booting up with the image that doesn't work. I suggest you use the boot command in rommon to force the router to boot with the image you want it to boot with.Check the following link:
I eventually came right by using confreg in rommon on its own without a value. It turns out confreg creates a value of 0x2141 instead of 0x2142. It looks like the 3640 uses different values (??) in the configuration register. I think I read that there is no RXBoot on a 3640, which 0x2141 should do. (correct me if i am wrong).
I chose not to change the boot characteristics, but to ignore NVRAM, which ended up with 0x2141. But anyway, all is well now (except that I cannot install a WIC2T card because my IOS will not recognise it (11.3) and version 12.1+ requires more memory than in the router - had to install 2 x WIC1T). Thanks all for replying.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...