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Method to perform cable validation with dynamic node position assignment Disclosure Number: IPCOM000249124D
Publication Date: 2017-Feb-08
Document File: 6 page(s) / 118K

Publishing Venue

The Prior Art Database


Method to perform cable validation with dynamic node position assignment. which would help in high end private/Hybrid cloud enterprise servers to save time on cable change management

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Method to perform cable validation with dynamic node position assignment

Disclosed is a device which would help in faster and safer cable connection management both in terms of plugging in or out. It can be further interpreted as a scenario mentioned . In multi-node cloud / enterprise or any other type of server systems, the system controller service processor is placed in a separate control node from where service processor interface cables ( carrying service processor specific interface (SPSI), processor specific Interface (PSI) and GPIO lines ) are cabled to the system nodes. In the picture below, the red lines are the Service Processor cables. The green box indicates the cables connecting the primary service processor to the system nodes while the orange box indicates the cables connecting the secondary service processor to the system nodes.


Ports are designated on a service processor contained node (System control) for connecting the service processor interface cables to System Nodes which have the processors. Cable validation is a process of confirming that the cables are correctly connected to designated ports on either ends ( system control and system nodes ). Proposed is a method to validate the service processor interface cable connections between the Service processor in system control node to system nodes to ensure that the connections from both service processors are uniform to all nodes. The proposed method first ensures that the cables originating from the primary service processor are connected to all the present nodes. A node position assignment to cable port numbers mapping table is prepared based on the primary service processor's connections. This mapping table is then used to verify if the cables originating from the backup service processor are also connected in the same way. Additionally, a method is proposed to ensure that cables originating from backup Service Processor are connected in the same topology as that of the primary Service Processor. In this method. the primary Service Processor intentionally disconnects service processor specific interface lines at the system node end of the cables originating from backup Service Processor and checks the links dropped at the system control node end thereby verifying whether the expected link went down. If the expected link did not go down, then this indicates wrong cabling between on the backup Service



Method 1:

Take a 2 drawer system and assume that there 2 Service Processor cables originating from Service Processor -A and are connected to each of the drawers.

a. Service Processor-A will assign node positions 0 and 1 to to the nodes at the end of each Service Processor cable. The assignment will be written to a scratch pad register on the LCC CFAMs on each node

b. Service Processor-A will inform Service Processor-B the mapping between SPSI Link Nr and Node positions

c. Service Processor-B will read from the same scratchpad registers on the each Node via...