SIMM Upgrade
DO NOT attempt a Forced BootP unless a BootP server has been configured for the 2H253-25R. The BootP server references the location of a station acting as a Trivial File Transfer Protocol (TFTP) server containing the 2H253-25R image file.
When the position of Switch 6 is changed and the power is cycled to the 2H253-25R, the device requests the image file location from the BootP server and uses TFTP to download the image from the TFTP server. If one of these requirements is not met, the 2H253-25R continues to request either the BootP server or the TFTP server until the RESET button on the 2H253-25R is pressed. Once the RESET button is pressed, the 2H253-25R resets after one minute and loads the image stored in FLASH memory.
•Switch 7 – Clear NVRAM. Changing the position of this switch resets NVRAM on the next power-up of the device. All user-entered parameters, such as the IP address, device names, etc., are reset to the factory default settings. Once the 2H253-25R resets, you can either use the factory default settings or reenter your own parameters.
•Switch 8 – Reset Password/Community Names. Changing the position of this switch clears user-entered passwords stored in NVRAM, and restores the factory default passwords on the next power-up of the device. Once the 2H253-25R resets, you can either use the factory default settings or reenter your own passwords.
Do not change the position of Switch 8 unless it is necessary to reset the module super-user configured passwords to their factory default settings.
B.4 SIMM UPGRADE
Memory upgrade is available for the 2H253-25R to expand its DRAM to 32 MB. This section explains how to locate and add/replace a Single In-line Memory Module (SIMM). For information on the available SIMM upgrades, call Cabletron Systems for technical support. For details on getting help, refer to Section 1.2.
B-6Optional Installations and Mode Switch Bank Settings