![]() Let’s also gather the MAC addresses because we’ll want those as a reference when looking at our tcpdump data. We can verify that this is the MAC address we’re seeing traffic from using tcpdump. You will likely never see two motherboards with exactly the same BIOS screen layout…but just look for IPMI and you’ll likely get to screens that look like this: In this scenario, we need to reboot and press DEL to get into the BIOS. We might have a motherboard that isn’t in the driver set for these tools. $ sudo ipmitool lan set 1 defgw ipaddr 192.168.0.1 $ sudo ipmitool lan set 1 netmask 255.255.255.0 The “lan set 1” phrase refers to “IPMI Device 1.” $ sudo ipmitool lan set 1 ipsrc static Similar commands are listed for IPMITool on this post. Or you can set a normal non-routable address like 192.168.0.251. ![]() Setting the address of 0.0.0.0 sometimes is a shortcut for disabling the IPMI LAN features. Both are probably going to rely on the same drivers, however. You might have either the ipmiutils or the ipmitool package available, maybe both. There are two ways of doing this, and you might not even need to reboot your server if your IPMI driver is included in the Linux distribution you are using. Turning off IPMI is often not possible, but turning off the IPMI port DHCP is possible. If the dedicated IPMI port is not cabled, IPMI will be served off the LAN1 port (which is predictably the MGT port on LANforge machines). The first two Ethernet ports on the motherboard are capable of serving the IPMI function. Many SuperMicro motherboards have IPMI features that have a dual-port feature.
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