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Accessing the Intel CNode BMC port (AKA, the green port)

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Summary

There are instances when access to an Intel 2U Quad Chassis dual-NIC CNode (without a VGA port for console) is unavailable via the standard Ethernet port. Here are a couple of reasons why this would be the case:

  1. A usable tech port has not been defined with a valid configuration.

  2. The CNode won’t boot, and you need a console to troubleshoot.

  3. You need a console to re-image the CNode.

  4. You can ping the  tech port, but you cannot SSH in to fix a potential sshd problem.

Port Location

Location in chassis

Cascade Lake CNode (BMC port in red circle)

The image shows the rear of a multi-node server chassis with an RJ45 port that has green markings circled indicating the port described in the document.

Location on the motherboard

Letter A represents the “dedicated management” port

The image shows the rear of a multi-node server chassis with an RJ45labeled “Dedicated Management Port”

Schematic

The Red line shows the path in the schematic for the “dedicated management” port

This is a block diagram showing a dual-socket Intel Xeon server architecture with CPUs, memory, PCIe slots, the C621 chipset, and I/O interfaces.

How to access the BMC port

  1. Set your laptop's wired Ethernet port to 192.168.20.2/255.255.255.252

  2. Ping the IP address 192.168.20.1

    1. If successful, go to step 3

    2. If unsuccessful, contact support

  3. Point your web browser to 192.168.20.1

  4. Authenticate:  (it’s possible that other username/password combos are configured)

    (Login to see passwords)

  • admin/123456

  • admin/admin

  • sysadmin/superuser

  1. Once logged in, choose the Remote control tab and the iKVM over HTML5 option

This is a screenshot of an Intel Integrated BMC Web Console showing system status, firmware versions, and a Remote Control dropdown with KVM/Console Redirection and KVM over HTML5 options.

This is a screenshot of the Intel Integrated BMC Web Console showing the Remote Control section with the KVM over HTML5 option selected, which allows remote server management through a web browser.

You will now have a “serial” console to the CNode to do things like upgrade VastOS.

This is a console screenshot showing CentOS Linux 7 boot messages with kernel 3.18.8-957.12.1.el7.vastos.7.x86_64, ending with a login prompt.

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