公开(公告)号：US20230412713A1

公开(公告)日：2023-12-21

申请号：US18101003

申请日：2023-01-24

Applicant: Cisco Technology, Inc.

Inventor： Scott Phuong ,  Krishna Prasad Pidamale ,  Kevin Russell Babst ,  Jared Lewis ,  Anant Thakar

IPC: H04L69/00 ,  H04L9/32

CPC classification number: H04L69/26 ,  H04L9/3271 ,  H04L9/3268

Abstract: This disclosure describes techniques for interoperability of a blade server in a server chassis, where IOMs of the server chassis do not provide dedicated pins for communicating a physical slot ID to the blade server. BMCs of the blade servers and CMCs of IOMs of the server chassis are mutually configured to broadcast Ethernet frames on layer 2 network segments over a broadcast domain configured by a switch module connected to the blade servers over layer 2 network segments; conduct a slot inference communication protocol using these Ethernet frame broadcasts to enable the CMC to determine a physical slot ID in response to a BMC request, and broadcast that physical slot ID back to the BMC; and use a public certificate-private certificate pair, based in a hardware root of trust, to enforce security of this communication protocol.