The DHCP Relay issue still has not been resolved.
The issue was DHCP Offer packets that being sent from the DHCP server are not
reaching the client.
Setup:
DHCP Client: IB Side Ubuntu OS with ConnectX3 FW ver 2.35.5000, Mellanox
OFED 3.2-1.0.1
DHCP Server: ETH Side Win2012 R2 with ConnectX3 FW ver 2.35.5000, WinOF 5.10
SX GW, MLNX_OS ver 3.4.3002
Looking at the traffic capture I can see packets are coming from the Windows
server towards the switch, but never leaving it.
Please refer to the following traffic capture files attached to the case:
Ibdump_dhcp – capture of ib0
Dhcp.pcap – port mirroring of the ETH port connected to the Windows
Dhcp_win2012 - wireshark capture of the windows dhcp server
Setup details is mentioned & marked above.
Setup:
IB Side: DHCP Client Ubunutu 14.04, OFED 3.2-1.0.1.1, CX3 2.35.5000
(10.7.55.193)
ETH Side: DHCP Server Win2012 R2, WinOF 5.10, CX3 2.35.5000
(10.7.55.190)
SX1036 GW: MLNX_OS ver 3.4.3002
Before installing the PPA
DHCP client sends discover, DHCP server send offer, however the packet never
reach the client, bootp flag is Unicast
** Attachment added: "dhcpcase files"
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1529815/+attachment/4597819/+files/dhcpcase.rar
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https://bugs.launchpad.net/bugs/1529815
Title:
InfiniBand DHCP flow with PRA and DHCP relay not working
Status in isc-dhcp package in Ubuntu:
In Progress
Status in isc-dhcp source package in Trusty:
In Progress
Status in isc-dhcp source package in Wily:
In Progress
Status in isc-dhcp source package in Xenial:
In Progress
Bug description:
DHCP client is sending discover with Unicast type request for the offer, in
this configuration of IB to ETH through a relay we need the type to be
broadcast.
The issue is that when using dhclient from the client on Ubuntu (and only on
Ubuntu) with MOFED or inbox driver, we see that that DHCP server offers in
unicast instead of broadcast. It seems there is no way to correct this from the
client side using dhclient configuration file.
this issue exist even when we use always-broadcast statement in configuration
file.
in other vendors we see that discover request type is broadcast.
attached pcap files from working (other vendor) and not working (Ubuntu)
clients.
DHCP CLIENT (IPoIB)
Ubuntu 14.04 kernel 3.13.0-74
Mellanox OFED 3.1-1.0.3 or inbox driver
isc-dhcp-client 4.2.4-7ubuntu12.3
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