Every 2 minutes the Switch checks the resilient links to ensure that the fastest link is the Main (active) link in the resilient link pair. If the fastest link is not the Main (active) link, the Switch automatically makes it the Main (active) link, on the condition that:
■There have not been any Lost Links within the last 2 minutes on the faster link that will become the Main (active) link.
■The faster link has been up for 2 minutes.
See the guide which accompanies your Switch for more details about setting up resilient links.
Upgrading Software
The ATM Module has its own software which is upgraded independently of the Switch software.
You may need to upgrade the software on the ATM Module or Switch if IBM produces a new version of the code, or if the existing code has somehow become corrupted.
The replacement software image must be held or placed on a local server which supports the Trivial File Transfer Protocol (TFTP).
Select the SOFTWARE UPGRADE option from the Main Menu. An example of the Software Upgrade screen is shown in Figure
Figure 8-10 Software Upgrade Screen
Complete the following fields:
Destination Specify the type of device which you wish to receive the upgraded software. If you are upgrading the software on the ATM Module, select the ATM Module option.
File Name Specify the name of the upgrade file held on the server for this type of device.
Server Address Specify the IP (or IPX) address of the server holding the upgrade file.
If the upgrade is interrupted, due to a power failure for example, when the device powers up again, the MGMT LED is lit green and flashes to indicate that an upgrade is taking place, and the Module LED on the Switch is lit Yellow. The device attempts to download the last specified software image file.
