ATM Configuration and Troubleshooting Guide

Conﬁguring EMS High Availability over ATM

Conﬁguring EMS HA-ATM for Local Recovery

Chapter 6 119

Step 1. Log in as root.

Step 2. Type sam to start SAM.

Step 3. Select “Networking and Communications”.

Step 4. Select “Network Interface Cards”.

Step 5. Highlight the primary ATM adapter that has the ELAN interface you

want to conﬁgure EMS HA-ATM for, and then choose Configure from

the “Actions” menu.

This opens the “Conﬁgure ATM Card” window, which lists all conﬁgured

interfaces for the ATM adapter.

Step 6. Highlight the ELAN interface you want to conﬁgure EMS HA-ATM for,

and select Configure HA over ATM from the “Actions” menu.

This opens the “High Availability over ATM” window. This window

shows the primary ELAN interface name, the IP address used by the

interface, and whether any secondary interfaces are available to be

conﬁgured (the “Available Secondary Interface Names” list).

Step 7. For each secondary ELAN interface you want to assign to the primary

ELAN interface, highlight the interface and select the Add button. This

moves it into the list of “Conﬁgured Secondary Interface Names.”

For example, if you are conﬁguring primary ELAN interface ela0, and

two secondary ATM adapters are installed in the system, two secondary

ELAN interfaces—elb0 and elc0—appear in the “Available” list (one

interface for each secondary adapter). An adapter is considered

“available” if it is enabled (ATM card parameters conﬁgured) and not

already conﬁgured with primary ELAN interfaces.

NOTE The order in which you assign the secondary ELAN interfaces is the

order in which recovery is tried. As an example, three secondary ATM

adapters are installed in the system, and for primary ELAN interface

ela0 you assigned three secondary ELAN interfaces: eld0, elb0, and

elc0 (in that order). Then, if ela0 fails, recovery is tried to eld0 ﬁrst,

then elb0, and ﬁnally elc0 (if necessary). This example is shown in

Figure 6-7 on page 117 earlier in this chapter.

Step 8. Select the OK button when you are ﬁnished.