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Low-confidence guide, verify on your hardware before relying on these steps. IBM IMM2 hardware is legacy (IBM sold the System x line to Lenovo in 2014) and online documentation is sparse. The exact web-interface path depends on the IMM2 firmware version. This is a high review priority, confirm every path against your own server and report corrections. Owner hardware validation is pending.
Applies to: IBM System x servers with IMM2 (Integrated Management Module II), for example the IBM x3650 M4 and x3550 M4.
IBM IMM is an Experimental vendor for ipmideck.

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Steps

1

Open the IMM2 web interface

In a browser, navigate to the IMM2 IP address and log in. The default credentials are USERID / PASSW0RD (note the zero in “PASSW0RD”). Change them immediately if they are still in use.
2

Open IMM Management → Network Protocol Properties

From the top menu, go to IMM Management → Network Protocol Properties, the page with tabs for Ethernet, SNMP, DNS, …, IPMI.
3

Enable IPMI access

Open the IPMI tab and tick Allow IPMI access, then click Apply.
IBM IMM2 Network Protocol Properties IPMI tab with Allow IPMI access enabled
Changing the IPMI port configuration requires an IMM reboot to take effect, the IMM shows this reminder on the IPMI tab.
4

Ensure an IPMI user ID exists

IBM’s documentation notes: “If no IPMI User IDs have been configured by the CMM, the network port associated with the IPMI protocol will be closed.” Make sure at least one IPMI user ID is configured, or the LAN port stays closed.
5

Verify connectivity

From the host that will run ipmideck:
ipmitool -I lanplus -H <imm2-ip> -U USERID -P <password> chassis status
Flag for review: the IMM2 web-UI path varies by firmware version, and IBM’s BMC documentation is sparse online. The full reference is the IMM2 Configuration User’s Guide (PDF). Validate every step against real hardware before relying on this guide.

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Source

CITED: pubs.lenovo.com/imm2, Managing the IMM2 with IPMI · IMM2 Configuration User’s Guide (IBM)