Unable to access the BMC after enabling then disabling DHCP

Robotics & Edge Computing IGX Orin Support Forum IGX Developer Kit
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1

Issue:

  • Unable to access the BMC after enabling then disabling DHCP from WebUI.

Environment:

  • IGX Orin 700 Board Kit, with BMC firmware from SW-1.0.

Steps to reproduce the problem:

  1. Open BMC WebUI (from 192.168.1.110). Enable “DHCP” under “Settings / Network”.
  2. Refer to (Optional) Configure Ubuntu as a DHCP Host and set up a DHCP server. Hook up the BMC with the DHCP server and reboot the BMC. The BMC should get a new IP address assigned by the DHCP server this time around, say, 10.1.1.100.
  3. Open BMC WebUI using the new IP (10.1.1.100). Disable “DHCP” under “Settings / Network”. Supposedly, the BMC should revert back to using fixed IP (192.168.1.110?).
  4. Reboot the BMC. It is observed that the BMC does not respond to 192.168.1.110.
  5. The BMC becomes inaccessible from Ethernet. We are not able to reproduce this issue multiple times, since it would cause BMC to fail.

Question:

  • Is there a way to force the BMC to restore its factory default settings (fixed IP at 192.168.1.110)?
2

Hi jkjung13,

Could you share the IPv4 configurations in WebUI(Settings / Network/IPv4)?

My configuration in IGX developer kit shows the following:

image
image1089×358 16.7 KB

There should be a static 192.168.1.110 entry listed so that you can access BMC. (even if DHCP is enabled)

Please also share the ifconfig result on your host for the interface you connect with IGX.

4

Could you share the IPv4 configurations in WebUI(Settings / Network/IPv4)?

I’m not able to connect to the BMC any more.

At the last time I logged in the BMC WebUI (before disabling DHCP), I only see the entry of the DHCP-assigned IP address in the table. I thought the IP address would be restored to default (192.168.1.110) after disabling DHCP. But it didn’t.

5

Do you remove the Static 192.168.1.110 manually which cause BMC can not be accessed currently?

If so, have you tried using the IP assigned by DHCP to access your BMC?

6

The IGX Orin 700 Board Kit was shipped to a customer for testing and product development. When the customer returned the Board Kit back to us, I was informed that DHCP was enabled for BMC.

I’m not sure whether the customer has removed the static IP entry 192.168.1.110 manually (or maybe it’s removed automatically when DHCP is enabled)…

7

Could you use the IP address assigned by DHCP server(from your host PC) to access BMC console currently?

8

Could you use the IP address assigned by DHCP server (from your host PC) to access BMC console currently?

Unfortunately, no,

That’s why I asked if there is a way to reset BMC settings to factory default.

9

Normally, you have to access BMC console to perform factory reset.

Why? Do you know the exact IP address assigned by your host?
Or it is still failed to be accessed through ssh root@<IP address>?

Have you tried to access BMC console through serial interface manually?

10

Do you know the exact IP address assigned by your host?

I set 192.168.1.2 as the fixed IP address for the host PC. I also set up DHCP server on the host PC so 192.168.1.10 (note: not 110) gets assigned to the BMC. That worked. But after I disabled DHCP on the BMC, I’m no longer able to connect to the BMC.

Have you tried to access BMC console through serial interface manually?

I haven’t. Do I need certain jig to do that? Could you point me to the corresponding documentation? Thanks.

11

Yes, you have to use 192.168.1.10 to access BMC first(so that you can access WebUI), and add static 192.168.1.110 entry back.
Or performing factory reset in WebUI: Operations → Factory reset → Reset BMC settings → Reset

12

Sorry to re-iterate… “But after I disabled DHCP on the BMC, I’m no longer able to connect to the BMC.”

So I’m not able to connect to the BMC now.

13

Okay, it seems you can not access BMC since you’ve removed all entries in IPv4 and also disable DHCP.

Please try to remove the BMC from the current IGX and plug in the BMC to another working IGX to do factory reset.

14

Even if I plug the BMC to another IGX Orin baseboard, it still cannot get an IP address, right? Do you mean I can somehow log into BMC from the IGX Orin system?

17

Hi @jkjung13,

Maybe I gave wrong info in my previous response.
Can your board boot successful currently? (i.e. if you can access the Tegra console?)
If so, please share the result of $ ip -br addr show from Tegra console.

18

The IGX Orin system could still boot (even when BMC cannot be accessed). Here is the result of $ ip -br addr show.

igx@IGX-IEC-20250507:~$ ip -br addr show
lo               UNKNOWN        127.0.0.1/8 ::1/128
enP5p3s0f0np0    DOWN
enP5p3s0f1np1    DOWN
enP1p3s0         UP
enP1p53s0        UP
can0             DOWN
can1             DOWN
usb0             UNKNOWN
wlx0c9d92bafdb2  UP             10.130.16.43/24 fe80::a93e:bcfd:801d:31f2/64
l4tbr0           DOWN
usb1             DOWN
usb2             DOWN
docker0          DOWN           172.17.0.1/16
igx@IGX-IEC-20250507:~$
19

By the way, I have also tried to mount the BMC module onto another working IGX Orin board. It did not resolve the problem. I don’t think that triggered a factory reset of the BMC module. The BMC module still doesn’t respond to 192.168.1.110 (no response for ping).

20

Could you reboot the IGX Orin and run this command again to check if there’s an interface called enx82a33d87651f?
If so, please run the following commands on Tegra console to access BMC.

$ sudo ip addr add 10.0.1.1/24 dev enx82a33d87651f
$ sudo ip link set enx82a33d87651f up
$ ssh root@10.0.1.110

If not, maybe you have to send BMC module back to us for further check.

21

I cannot find the interface with the name enx82a33d87651f.

igx@IGX-IEC-20250507:~$ ip -br addr show
lo               UNKNOWN        127.0.0.1/8 ::1/128
enP1p3s0         UP
enP1p53s0        UP
enxde04127ea424  UP
enP5p3s0f0np0    DOWN
enP5p3s0f1np1    DOWN
can0             DOWN
can1             DOWN
wlx0c9d92bafdb2  UP             10.130.16.78/24 fe80::a93e:bcfd:801d:31f2/64
l4tbr0           DOWN
usb0             DOWN
usb1             DOWN
docker0          DOWN           172.17.0.1/16
igx@IGX-IEC-20250507:~$ sudo ip addr add 10.0.1.1/24 dev enx82a33d87651f
[sudo] password for igx:
Cannot find device "enx82a33d87651f"
igx@IGX-IEC-20250507:~$
22

Please try using this interface instead.

$ sudo ip link set enxde04127ea424 down
$ sudo ip addr add 10.0.1.1/24 dev enxde04127ea424
$ sudo ip link set enxde04127ea424 up
$ ssh root@10.0.1.110
23

The interface name changed after reboot.

igx@IGX-IEC-20250507:~$ ip -br addr show
lo               UNKNOWN        127.0.0.1/8 ::1/128
enP1p3s0         UP
enP1p53s0        UP
enx0a1f7105b9c1  UP
enP5p3s0f0np0    DOWN
enP5p3s0f1np1    DOWN
can0             DOWN
can1             DOWN
wlx0c9d92bafdb2  UP             10.130.16.78/24 fe80::a93e:bcfd:801d:31f2/64
l4tbr0           DOWN
usb0             DOWN
usb1             DOWN
docker0          DOWN           172.17.0.1/16
igx@IGX-IEC-20250507:~$

So, I tried it with enx0a1f7105b9c1 instead. And it worked.

igx@IGX-IEC-20250507:~$ sudo ip link set enx0a1f7105b9c1 down
igx@IGX-IEC-20250507:~$ sudo ip addr add 10.0.1.1/24 dev enx0a1f7105b9c1
igx@IGX-IEC-20250507:~$ sudo ip link set enx0a1f7105b9c1 up
igx@IGX-IEC-20250507:~$ ssh root@10.0.1.110
root@10.0.1.110's password:
root@bmc-tc119:~#

I will try to access the BMC through WebUI later.