Date: Wed, 12 Feb 2020 13:18:40 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: "Kumar, Anmol" <anmolk@panasas.com>, "freebsd-infiniband@freebsd.org" <freebsd-infiniband@freebsd.org> Subject: Re: DHCP server for freebsd on IPoIB Message-ID: <20200212111840.GE4808@kib.kiev.ua> In-Reply-To: <f4647c23-440b-b6c5-93e7-0e83fce62196@selasky.org> References: <AE58E1E2-70EF-43FC-B3F4-6E2B7FA95645@panasas.com> <f4647c23-440b-b6c5-93e7-0e83fce62196@selasky.org>
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On Wed, Feb 12, 2020 at 10:26:26AM +0100, Hans Petter Selasky wrote: > 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. I believe, more importantly, there is no bpf hooks in the ipoib driver. > > 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? I briefly looked at RFCs, and it seems that DHCP protocol only depends on the broadcast. But the ISC DHCP server implementation indeed assumes working bpf.
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