ATM Configuration and Troubleshooting Guide

Replacing a Defective Adapter
Changing an Adapter’s MAC Address
Chapter 11310
Changing an Adapter’s MAC Address
Changing the MAC address disrupts any connections currently using the
ATM adapter and can also cause temporary confusion on the network.
All nodes auto-recover once the new MAC address is registered. So, if
problems occur on the ATM network at the same time as the adapter is
being replaced, complete the replacement procedure before trying to
troubleshoot.
To change an ATM adapter’s MAC address, follow these steps:
Step 1. Obtain the MAC address of the adapter that is being replaced. You can
find the MAC address by doing one of the following:
• Look at the ATM ARP Server configuration for one of the ATM ARP
Clients. The MAC address is the last 14 digits of the ATM address,
less the final two zeros (a total of 12 digits).
• Look at the label on the old adapter (only for product J2804A).
Although the J2804A adapter is discontinued beginning with this
release, it is included here for backwards compatibility.
• Look at the SAM “Configure ATM Card” window for the old adapter
before you replace it.
• Use this command:
atmmgr show -p
Step 2. Shut down the system, disconnect all telecommunications cables, and
disconnect the power cable.
Step 3. Remove the old adapter and install the replacement ATM adapter in the
system. Reconnect all cables and restart the system. See the Hardware
Installation Guide provided with the new adapter for details.
Step 4. Log in as root.
Step 5. At the command line, type the following:
atmmgr card_inst_num macaddr -A new_address
where
• card_inst_num is the instance number of the ATM adapter.