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Administration and Management
IPX-Based Smart Module
In addition to SNMP over IP and IPX, the repeater supports the IPX-Based
Smart Module Management Protocol (SMMP). This proprietary, IPX-based
protocol is designed to manage Compaq repeaters.
The repeater responds to fault conditions in the following ways:
Powered Down Repeater: After power is removed from the repeater,
the SNMP network manager re-synchronizes the inter-hub
communications and ignores (does not detect) the repeater.
Hot Swapping a Repeater: When a repeater is removed from or added
to an existing stack, an inter-hub communication error occurs. After the
SNMP network manager re-synchronizes inter-hub communications, is
sees the new stack configuration.
Repeater Hardware Failure: If the top or bottom repeater has a
hardware failure (for example, the CPU fails), the SNMP network
manager re-synchronizes inter-hub communications and sees a shorter
stack. If one of the middle repeaters fails, the SNMP network manager
sees two sub-stacks (one stack above and one stack below the failed
repeater). The sub-stacks can be merged by cabling around the failed
repeater or by powering off the defective repeater (if the bypass circuitry
has not failed).
Powering a Repeater Off and Back On: For 5 seconds to 170 minutes
(maximum number BOOTP/RARP retries and the maximum
BOOTPP/RARP time out) after a repeater has had its power cycled, it is
unable to participate in the inter-hub communications. During this
interval, the repeater performs a POST and makes BOOTP and RARP
requests. Until these tasks are complete, the SNMP network manager
sees the same results that occur when there is a repeater hardware failure
(that is, a shorter stack or two sub-stacks).