Cisco Cisco IOS Software Release 12.2

You can run Cisco IOS Releases 12.1(7)DA2 to 12.2(10)DA on the new NI-2 cards (NI2-155MM-155MM2 
and NI2-155SM-155SM2). However, before you attempt to boot the Cisco IOS software from flash, you 
must first boot the ni2-dboot2-mz (dboot2) image from bootflash.

To run Cisco IOS releases earlier than Release 12.2(12)DA on a new NI-2 card, do not boot from 
flash until you have booted the ni2-dboot2-mz image from bootflash. Otherwise, the DSLAM 
becomes inoperable.

If you encounter problems booting Cisco IOS Release 12.1(7)DA2 to 12.2(10)DA on the new NI-2 cards, 
perform the following steps to correct the problem and make the DSLAM operational:

Issue the following command in to ensure that the correct dboot2 image is loaded in bootflash memory:

DSLAM> show ni2-switch register

Check the command output to make sure the FPGA major revision is 3 (see highlighted text below). 
This indicates that the dboot2 image is loaded.

Upstream FPGA revision MAJ:3 Minor:0

Issue the following command in global-configuration mode to set the configuration register to load the 
DSLAM image from the boot system commands in the startup configuration file:

DSLAM(config)# config-register 0x2102

Exit configuration mode and reload (reboot) the DSLAM to make the DSLAM operational. 
This process loads the images in the correct order: dboot2 and then the legacy Cisco IOS software.

DSLAM(config)# end

DSLAM# reload

This procedure describes how to use ROM monitor (rommon) mode to recover from problems caused by 
an invalid or corrupt dboot2 image. This procedure uses the xmodem command to retrieve a valid dboot2 
image from a PC or network server.

The xmodem command used in this procedure is extremely slow. Therefore, only perform this 
procedure if all other attempts to obtain a dboot2 image fail. Also note that the command is supported 
only on the new NI-2 cards (NI2-155MM-155MM2 and NI2-155SM-155SM2).

Log in to the DSLAM through a console port. The rommon prompt (

rommon>

) should be displayed. If it 

is not, get into configuration mode and issue the command config-register 0x0 end write reload.

Issue the following command at the rommon prompt.

rommon> config-register 0x2102

Issue the following command to manually boot the DSLAM from bootflash.

rommon> boot bootflash: [filename]