DHCP server for freebsd on IPoIB

Hans Petter Selasky hps at selasky.org
Wed Feb 12 09:26:51 UTC 2020

On 2020-02-11 22:46, Kumar, Anmol wrote:
> Hi,
> I am trying to make  dhcp 4.4.2b1 work on Mellanox Infiniband for IPoIB.
>    1.  Seems like , bpf does not have support for IPoIB as family passed in zero so IPoIB driver returns error.
>    2.  I tried using sockets for DHCP server and send is successful (returning exact number of bytes in packet) but I do not see packet in IPoIB driver.
>    3.  Able to receive DHCP broadcast request to DHCP server code (user space)
>    4.  Ping is working fine (statically assign IP address) and seems like issue with DHCP broadcast replies in DHCPOFFER (same code works with Linux)
> Any help will be appreciated .

Hi Kumar,

IPoIB is an IP carrier.

Doesn't dhcp require an ethernet carrier for the reception of frames via 
BPF to work?


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