Technical Library

Certified Hardware & Software

Compatible Routers

Dedicated Access

1220i

1250i, 1270i

Routing with Compatible Systems MicroRouter 1220i, 1250i, 1270i for Dedicated Access Service

Troubleshooting Guide

OS Restoration

One known way that the router can lose the OS is if the router is power cycled while it is either compressing or writing the FLASH ROM.

Both the system OS and the configuration information are kept in a single FLASH ROM. In order to update either of these, the router must write the existing information to dynamic RAM, erase the FLASH, and then write the RAM information back into the FLASH ROM.

If the router loses power after starting to erase the FLASH ROM and before it has had a chance to complete writing the information into the FLASH ROM, the contents of the FLASH ROM will be incomplete and unusable by the router. Hence, the reason it boots from ROM.

In order to reload the router operating system, we will need to have one of the following setups using the Ethernet port on the router.

• An Ethernet cable with the transmit and receive rolled (RJ45 cross over cable), and a PC or Mac with an Ethernet card.
  
  If using the above scenario, connect the two directly.
  
  
• A PC or Macintosh with an Ethernet card and an Ethernet hub.
  
  For this scenario, external network traffic to the router should be eliminated. Be sure to:
  
  
  • disconnect the cable from the WAN port on the router.
  • have only the router and one PC or Mac connected to the hub.

Launch CompatiView from the PC or Mac that you are using.

The software should be able to connect to the router using the IPX or AppleTalk transport (which ever applies).

If you need to connect via IP, first change the address of your workstation to 198.41.12.2. The router has a default IP address of 198.41.12.1.

The default password is letmein.

PC Instructions

1. Choose Administration-TFTP Download.

2. For IP address of Unknown Router put
   198.41.12.1

3. Put the Windows diskette labeled MicroRouter in floppy drive and choose the only *.dld file that should exist there

4. Click on OK.

Macintosh Instructions

1. Choose Administration-Download Software.

2. Put the Macintosh diskette labeled MicroRouter in floppy drive and choose the MR1270_v4.0.1 file that should exist there.

3. Click on OK.