# Ringnode Mirroring

Ringnode Mirroring is a way of protecting network users against hardware failures, for example, cable faults. To mirror a Ringnode, you need to install a second Ringnode which can take over from the first.

One Ringnode, the Primary Ringnode, inserts into the ring and is monitored by the server. If the Primary Ringnode fails, the server shuts it down safely and initializes the second, or Hot Standby Ringnode, giving it the same LAA (locally administered node address) as the Primary Ringnode.

To perform Ringnode Mirrroring:

1. Load MADGEODI onto one Ringnode. Specify an LAA on the command line, by using the NODE command (see Figure 1).

2. Load MMIRROR.NLM. Specify a BOARD number to identify which adapter is the Primary Ringnode. Specify a MIRRORPORT (for EISA and AT Plus Ringnodes) or MIRRORSLOT (Micro Channel Ringnodes) to identify which adapter is the Hot Standby Ringnode (see Figure 1).

   > `LOAD MADGEODI PORT=3000 NODE=400012131415

   > LOAD MMIRROR BOARD=1 MIRRORPORT=4000

   > LOAD ROUTE BOARD=1

   > BIND IPX TO MADGEODI NET=2

   > `

   Figure 1 Sample AUTOEXEC.NCF file

3. Bind the driver.

For more information, refer to Mirrored Ringnodes Using MMIRROR.NLM. Use the "<" (Back) button to return to this page.