Installation Prerequisites

Caution All CxBus interface processors support OIR; however, you must shut down the system before removing or installing the RSP7000, which is a required system component. Removing an RSP7000 while the system is operating will cause the system to shut down or crash, and might damage or destroy memory ﬁles.

Each RSP7000 and interface processor contains a bus connector with which it connects to the system backplane. The bus connector is a set of tiered pins, in three lengths. The pins send speciﬁc signals to the system as they make contact with the backplane.

The system assesses the signals it receives and the order in which it receives them to determine what event is occurring and what task it needs to perform, such as reinitializing new interfaces or shutting down removed ones. For example, when you insert an interface processor, the longest pins make contact with the backplane ﬁrst, and the shortest pins make contact last. The system recognizes the signals and the sequence in which it receives them. The system expects to receive signals from the individual pins in this logical sequence, and the ejector levers help to ensure that the pins mate in this sequence.

When you remove or insert an interface processor, the backplane pins send signals to notify the system, which then performs as follows:

1Rapidly scans the backplane for conﬁguration changes and does not reset any interfaces.

2Initializes all newly inserted interface processors, noting any removed interfaces and placing them in the administratively shutdown state.

3Brings all previously conﬁgured interfaces on the interface processor back to the state they were in when they were removed. Any newly inserted interfaces are put in the administratively shutdown state, as if they were present (but unconﬁgured) at boot time. If a similar interface processor type has been reinserted into a slot, then its ports are conﬁgured and brought online up to the port count of the original interface processor.

OIR functionality enables you to add, remove, or replace interface processors with the system online, which provides a method that is seamless to end users on the network, maintains all routing information, and ensures session preservation.

When you insert a new interface processor, the system runs a diagnostic test on the new interfaces and compares them to the existing conﬁguration. If this initial diagnostic test fails, the system remains off line for another 15 seconds while it performs a second set of diagnostic tests to determine whether or not the interface processor is faulty and if normal system operation is possible.

If the second diagnostic test passes, which indicates that the system is operating normally and the new interface processor is faulty, the system resumes normal operation but leaves the new interfaces disabled. If the second diagnostic test fails, the system crashes, which usually indicates that the new interface processor has created a problem on the bus and should be removed.

The system brings online only interfaces that match the current conﬁguration and were previously conﬁgured as up; all other interfaces require that you conﬁgure them with the conﬁgure command. On interface processors with multiple interfaces, only the interfaces that have already been conﬁgured are brought online.

For example, if you replace a dual-interface Ethernet Interface Processor (EIP) with an EIP with four interfaces, only the previously conﬁgured interfaces are brought online automatically; the new interfaces remain in the administratively shutdown state until you conﬁgure them and bring them online.

107000 Series Route Switch Processor (RSP7000) Installation and Conﬁguration in the Cisco 7000 Series Routers