I recently bought a Lenovo ThinkServer TS140 to replace my aging HP Microserver. Rather than using a standard serial console to admin the machine, I've been playing around with the Intel AMT serial-over-LAN capabilities. The following notes might help others who'd like to use this feature with OpenBSD; hopefully they'll save you some hair-tearing.
The Intel AMT technology can piggyback on the onboard NIC, sharing the same IP and MAC as the operating system. I'm not a fan of that idea, so I opted to leave the onboard NIC as a dedicated management interface and add another NIC for the OS. So, in my system, em0 (onboard) is used only for serial-over-LAN administration, and em1 (PCI-E card) is used by OpenBSD. Lenovo published a pretty decent PDF on configuring AMT, available here: http://www.lenovo.com/images/products/server/pdfs/tech_resources/thinkserver_config_amt_ts140_ts440_tr.pdf To get serial-over-LAN working, you can largely follow that PDF, but for steps 18 and 19, you can leave IDER and KVM disabled. For step 20, Legacy Redirection Mode needs to be enabled. The serial-over-LAN device is presented as a puc(4) card with com4 attaching to it: puc0 at pci0 dev 22 function 3 "Intel 8 Series KT" rev 0x04: ports: 1 com com4 at puc0 port 0 apic 8 int 19: ns16550a, 16 byte fifo To get a working console, I edited /etc/ttys like so: tty04 "/usr/libexec/getty std.9600" vt220 on secure Then, to get the console working at boot, I configured /etc/boot.conf as follows: machine comaddr 0x0000f0e0/0x0008 set tty com4 The "machine commaddr 0x0000f0e0/0x0008" line was worked out by running 'pcidump -v' and finding the BAR io addr for this device: 0:22:3: Intel 8 Series KT 0x0000: Vendor ID: 8086 Product ID: 8c3d 0x0004: Command: 0007 Status: 00b0 0x0008: Class: 07 Subclass: 00 Interface: 02 Revision: 04 0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00 0x0010: BAR io addr: 0x0000f0e0/0x0008 0x0014: BAR mem 32bit addr: 0xf7d3e000/0x00001000 0x0018: BAR empty (00000000) 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 17aa Product ID: 30a5 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 02 Line: 0a Min Gnt: 00 Max Lat: 00 0x00c8: Capability 0x01: Power Management 0x00d0: Capability 0x05: Message Signaled Interrupts (MSI) That completed the setup on the ThinkServer side. To connect to it from my workstation, I installed the amtterm-cli package and ran 'amtterm 192.168.1.19' (the IP address I'd assigned to the AMT interface during setup). Playing around with powering up/shutting down/rebooting produced a lot of erratic results that left me scratching my head. I'd be able to connect, then suddenly lose the connection and be unable to reestablish it. I eventually noticed in my workstation's ARP table that the MAC for the management interface had changed to all zeros. Obviously, that's going to cause some connectivity issues! Apparently, the serial-over-LAN function works just fine through the boot process, up until the OS initializes the NIC. Connectivity drops, and the MAC ends up all zeros. I was able to partially work around this by creating a hostname.em0 file containing 'up' on the ThinkServer. By bringing the interface up but otherwise unconfigured, the correct MAC address is retained. Now, If I reboot during a serial-over-LAN session, I see the normal boot messages up until the NIC is initialized, and then the connection is dropped. However, I'm able to re-open the connection just a few seconds later, once the OS brings the interface up. Other than this disconnect issue, it basically works like any other serial console. If anyone has any clues on ways to resolve that disconnect issue, I'd love to hear about it. Full dmesg follows: OpenBSD 5.8-current (GENERIC.MP) #1289: Sat Aug 29 12:12:47 MDT 2015 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 4162596864 (3969MB) avail mem = 4032548864 (3845MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xedc10 (87 entries) bios0: vendor LENOVO version "FBKTB3AUS" date 06/16/2015 bios0: LENOVO ThinkServer TS140 acpi0 at bios0: rev 2 acpi0: sleep states S0 S5 acpi0: tables DSDT FACP APIC FPDT FIDT TCPA DBGP LUFT SSDT SSDT MCFG HPET SSDT SSDT ASF! BGRT EINJ ERST HEST BERT acpi0: wakeup devices UAR1(S0) UAR2(S0) PS2K(S0) PS2M(S0) PXSX(S0) RP01(S0) PXSX(S0) RP02(S0) PXSX(S0) RP03(S0) PXSX(S0) RP04(S0) PXSX(S0) RP05(S0) PXSX(S0) RP06(S0) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz, 3392.66 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SENSOR,ARAT cpu0: 256KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz, 3392.15 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SENSOR,ARAT cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz, 3392.15 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SENSOR,ARAT cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz, 3392.15 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,SENSOR,ARAT cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 0, core 3, package 0 ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63 acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 1 (RP01) acpiprt2 at acpi0: bus 2 (RP02) acpiprt3 at acpi0: bus 3 (RP04) acpiprt4 at acpi0: bus -1 (PEG0) acpiprt5 at acpi0: bus -1 (PEG1) acpiprt6 at acpi0: bus -1 (PEG2) acpiec0 at acpi0: not present acpicpu0 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu2 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu3 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpipwrres0 at acpi0: FN00, resource for FAN0 acpipwrres1 at acpi0: FN01, resource for FAN1 acpipwrres2 at acpi0: FN02, resource for FAN2 acpipwrres3 at acpi0: FN03, resource for FAN3 acpipwrres4 at acpi0: FN04, resource for FAN4 acpitz0 at acpi0: critical temperature is 105 degC acpitz1 at acpi0: critical temperature is 105 degC acpibat0 at acpi0: BAT0 not present acpibat1 at acpi0: BAT1 not present acpibat2 at acpi0: BAT2 not present acpibtn0 at acpi0: PWRB acpibtn1 at acpi0: LID0 acpivideo0 at acpi0: GFX0 acpivout0 at acpivideo0: DD1F cpu0: Enhanced SpeedStep 3392 MHz: speeds: 3201, 3200, 3000, 2900, 2700, 2500, 2300, 2200, 2000, 1800, 1700, 1500, 1300, 1100, 1000, 800 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Xeon E3-1200 v3 Host" rev 0x06 vga1 at pci0 dev 2 function 0 "Intel HD Graphics P4600" rev 0x06 intagp at vga1 not configured inteldrm0 at vga1 drm0 at inteldrm0 error: [drm:pid0:i915_write32] *ERROR* Unknown unclaimed register before writing to 100000 inteldrm0: 1024x768 wsdisplay0 at vga1 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) azalia0 at pci0 dev 3 function 0 "Intel Core 4G HD Audio" rev 0x06: msi azalia0: No codecs found xhci0 at pci0 dev 20 function 0 "Intel 8 Series xHCI" rev 0x05: msi usb0 at xhci0: USB revision 3.0 uhub0 at usb0 "Intel xHCI root hub" rev 3.00/1.00 addr 1 "Intel 8 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured puc0 at pci0 dev 22 function 3 "Intel 8 Series KT" rev 0x04: ports: 1 com com4 at puc0 port 0 apic 8 int 19: ns16550a, 16 byte fifo com4: console em0 at pci0 dev 25 function 0 "Intel I217-LM" rev 0x05: msi, address 6c:0b:84:09:f9:bd em0: PHY reset is blocked due to SOL/IDER session. ehci0 at pci0 dev 26 function 0 "Intel 8 Series USB" rev 0x05: apic 8 int 17 usb1 at ehci0: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia1 at pci0 dev 27 function 0 "Intel 8 Series HD Audio" rev 0x05: msi azalia1: codecs: Realtek ALC662 audio0 at azalia1 ppb0 at pci0 dev 28 function 0 "Intel 8 Series PCIE" rev 0xd5 pci1 at ppb0 bus 1 ppb1 at pci0 dev 28 function 1 "Intel 8 Series PCIE" rev 0xd5: msi pci2 at ppb1 bus 2 em1 at pci2 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 68:05:ca:3a:8e:b2 ppb2 at pci0 dev 28 function 3 "Intel 8 Series PCIE" rev 0xd5: msi pci3 at ppb2 bus 3 ppb3 at pci3 dev 0 function 0 "ITExpress IT8893E PCIE-PCI" rev 0x41 pci4 at ppb3 bus 4 ehci1 at pci0 dev 29 function 0 "Intel 8 Series USB" rev 0x05: apic 8 int 23 usb2 at ehci1: USB revision 2.0 uhub2 at usb2 "Intel EHCI root hub" rev 2.00/1.00 addr 1 pcib0 at pci0 dev 31 function 0 "Intel C226 LPC" rev 0x05 ahci0 at pci0 dev 31 function 2 "Intel 8 Series AHCI" rev 0x05: msi, AHCI 1.3 ahci0: port 0: 6.0Gb/s ahci0: port 1: 6.0Gb/s ahci0: port 2: 6.0Gb/s ahci0: port 3: 6.0Gb/s ahci0: port 4: 1.5Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 850, EMT0> SCSI3 0/direct fixed naa.5002538d4019e022 sd0: 238475MB, 512 bytes/sector, 488397168 sectors, thin sd1 at scsibus1 targ 1 lun 0: <ATA, ST4000VN000-1H41, SC46> SCSI3 0/direct fixed naa.5000c50079458b1b sd1: 3815447MB, 512 bytes/sector, 7814037168 sectors sd2 at scsibus1 targ 2 lun 0: <ATA, ST4000VN000-1H41, SC46> SCSI3 0/direct fixed naa.5000c500799ccc22 sd2: 3815447MB, 512 bytes/sector, 7814037168 sectors sd3 at scsibus1 targ 3 lun 0: <ATA, ST4000VN000-1H41, SC46> SCSI3 0/direct fixed naa.5000c500794576ca sd3: 3815447MB, 512 bytes/sector, 7814037168 sectors cd0 at scsibus1 targ 4 lun 0: <HL-DT-ST, DVD-ROM DTA0N, DC01> ATAPI 5/cdrom removable ichiic0 at pci0 dev 31 function 3 "Intel 8 Series SMBus" rev 0x05: apic 8 int 18 iic0 at ichiic0 sdtemp0 at iic0 addr 0x19: mcp98243 spdmem0 at iic0 addr 0x51: 4GB DDR3 SDRAM ECC PC3-12800 with thermal sensor isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard, using wsdisplay0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 uhidev0 at uhub0 port 10 configuration 1 interface 0 "APC Back-UPS ES 450 FW:844.K2 .D USB FW:K2" rev 1.10/1.06 addr 2 uhidev0: iclass 3/0, 123 report ids upd0 at uhidev0 uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.05 addr 2 uhub4 at uhub2 port 1 "Intel Rate Matching Hub" rev 2.00/0.05 addr 2 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd4 at scsibus3 targ 1 lun 0: <OPENBSD, SR RAID 1, 005> SCSI2 0/direct fixed sd4: 3815447MB, 512 bytes/sector, 7814036576 sectors root on sd0a (918dcdbb8c221cb4.a) swap on sd0b dump on sd0b -- Joe Gidi j...@entropicblur.com "You cannot buy skill." -- Ross Seyfried
