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forward the alert to another system on the ASM interconnect network that has the
communication resources to forward the alert.
Alerts are typically sent only once (per connection type), but an alert is forwarded to
another interconnect device if the resources exist on other interconnect devices in
the network. For example, on a three ASM processor network where ASM
processor 1 generates a modem alert, but does not have a modem and the other
ASM processors have modems, the following might occur:
If ASM processor 1 generates an alert and the modem is unplugged from ASM
processor 2 45 seconds prior to ASM processor 1 generating the alert, ASM
processor 1 forwards the alert to ASM processor 2, having previously determined
that ASM processor 2 has an available modem. When ASM processor 2 receives
the forwarded alert, it determines that a modem is attached to ASM processor 3,
and forwards the alert. Therefore, depending upon the time frame (45 seconds)
within which a resource (modem) fails, the alert might be forwarded multiple times
until an interconnect device can send the alert.
Connecting the ASM Interconnect module to the xSeries 450
The ASM Interconnect module connects the Remote Supervisor Adapter to the ASM
interconnect network. This module must be purchased separately. To connect the
ASM interconnect module to the Remote Supervisor Adapter, complete the following
steps.
Attention:
To avoid damage to the Ethernet connector, do not plug the ASM
interconnect module into the Remote Supervisor Adapter Ethernet port.
1. Connect the ASM Interconnect module 1 to the Remote Supervisor Adapter
ASM interconnect (peer-to-peer) port 2 as shown in the following illustration.
This port is on the edge of the Remote Supervisor Adapter that is accessible
from the rear of the server and is labeled RS485.
2. Connect one or two Category 3 or Category 5 Ethernet cables to the other end
of the ASM Interconnect module.
3. Continue with "ASM interconnect network configuration examples" on page 28.
Chapter 2. Configuring your server
27
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