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Date:      Wed, 12 Feb 2020 10:26:26 +0100
From:      Hans Petter Selasky <hps@selasky.org>
To:        "Kumar, Anmol" <anmolk@panasas.com>, "freebsd-infiniband@freebsd.org" <freebsd-infiniband@freebsd.org>
Subject:   Re: DHCP server for freebsd on IPoIB
Message-ID:  <f4647c23-440b-b6c5-93e7-0e83fce62196@selasky.org>
In-Reply-To: <AE58E1E2-70EF-43FC-B3F4-6E2B7FA95645@panasas.com>
References:  <AE58E1E2-70EF-43FC-B3F4-6E2B7FA95645@panasas.com>

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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?

--HPS




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