In this document, the Cisco 2811 or 2821 routers are referred to as the router, the module, or the system. 1.4 Document Organization. IOS image stored in the card may not be modified or upgraded. The card itself must never be removed from the drive. Tamper evident seal will be placed over the card in the drive. Jan 2, 2014 - Cisco 1800 Series Integrated Services Routers (Modular). Cross-platform images and Cisco 2811, Cisco 2821, and Cisco 2851 are supported.
I have a Cisco 2811 router with 2 x 4 port FXO cards and 2 x 2 port FXS cards. I want to use the FXO for PSTN gateway and the FXS for a couple of analog lines.I have a working FreePBX install - working in that I have a SIP provider account that I can make inbound calls successfully to the PBX, so I know the extensions are working and the inbound route is working (I only have an any CID/DID route set up while testing).I have not attempted to set up outbound routes to point to the Cisco as of yet. I looked at a number of posts, both on this forum and others, however none seem to have pointed me to the answer I need.Specifics: FreePBX 13.0.95, installed from the ISO downloaded on the FreePBX site. Cisco 2811 ISR running IOS 12.4(12)b (image is c2800nm-advipservicesk9-mz.124-12b.bin).The following configurations have been sanitized.
Most of the times ROMmon mode is activated if the configuration register of the Cisco router is not set. You only need to set that register value in order to boot properly through the Flash image file. Confreg is the command for setting the correct register value.But if you want to load a new IOS image in the router Flash, you will need the tftpdnld command for this purpose. Tftpdnld command runs in ROMmon mode and has some requirements before it can be executed. Before going to the requirements, let’s go through the Router connections. You will need have a valid Cisco IOS image which is to be loaded in the Flash of the router.
After setting the above variable, you will need to run the tftpdnld -r command. The -r switch will automatically load the IOS image that will be uploaded through tftpdnld command. Before running the tftpdnld command, you may use the set command to see that all the variables are set correctly.After the copying of the new IOS image is complete, the router will automatically load it into the memory.
You may be prompted for the initial configuration if there is no startup-config available to the router.You may reboot the router by using the reload command and confirm to see if the router boots to the newly installed IOS image by default. Otherwise you will need to configure the configuration register by using the confreg command.In my case, although the router booted successfully using the new IOS image, but the image was not present in the router flash memory. To see your flash contents, issue the following command:routershow flashIn ROMmon mode this command will not work. You will need to use the following command instead:rommon 1dir flash:You can use the copy command to copy the new IOS image to the flash once the IOS loaded from ROMmon is running.routercopy tftp flashI hope this will be helpful for network administrators working with Cisco equipment.
I had hard time finding out all this information that why decided to document it here so that everyone else can find and implement it easily. Your comments will be highly appreciated. Must Read Articles:.