Verification for Xenial:
ubuntu@dixie:~$ uname -a
Linux dixie 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
ubuntu@dixie:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
ubuntu@dixie:~$ dpkg -l | grep isc-dhcp
ii isc-dhcp-client 4.3.3-5ubuntu12.1 amd64
DHCP client for automatically obtaining an IP address
ii isc-dhcp-common 4.3.3-5ubuntu12.1 amd64
common files used by all of the isc-dhcp packages
ii isc-dhcp-server 4.3.3-5ubuntu12.1 amd64
ISC DHCP server for automatic IP address assignment
You can observe that DHCP works AND broadcast flag is set (by sniffing
dhcp server ib0 interface):
ubuntu@dixie:~$ sudo tcpdump -i ib0 -nn -vvv -S
tcpdump: listening on ib0, link-type LINUX_SLL (Linux cooked), capture size
262144 bytes
16:21:22.603191 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request, length
300, htype 32, hlen 0, xid 0x6775c96f, Flags [Broadcast] (0x8000)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Hostname Option 12, length 5: "hertz"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
Client-ID Option 61, length 17: hardware-type 56,
30:3a:30:30:3a:30:30:3a:34:38:3a:46:45:3a:38:30
END Option 255, length 0
PAD Option 0, length 0, occurs 15
16:21:22.603401 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
172.16.0.1.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length
300, htype 32, hlen 0, xid 0x6775c96f, Flags [Broadcast] (0x8000)
Your-IP 172.16.0.19
Server-IP 172.16.0.1
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
BR Option 28, length 4: 172.16.0.255
Domain-Name Option 15, length 7: "myib.cu"
END Option 255, length 0
PAD Option 0, length 0, occurs 23
16:21:22.603586 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request, length
300, htype 32, hlen 0, xid 0x6775c96f, Flags [Broadcast] (0x8000)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Server-ID Option 54, length 4: 172.16.0.1
Requested-IP Option 50, length 4: 172.16.0.19
Hostname Option 12, length 5: "hertz"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
Client-ID Option 61, length 17: hardware-type 56,
30:3a:30:30:3a:30:30:3a:34:38:3a:46:45:3a:38:30
END Option 255, length 0
PAD Option 0, length 0, occurs 3
16:21:22.603758 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP
(17), length 328)
172.16.0.1.67 > 255.255.255.255.68: [udp sum ok] BOOTP/DHCP, Reply, length
300, htype 32, hlen 0, xid 0x6775c96f, Flags [Broadcast] (0x8000)
Your-IP 172.16.0.19
Server-IP 172.16.0.1
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 172.16.0.1
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
BR Option 28, length 4: 172.16.0.255
Domain-Name Option 15, length 7: "myib.cu"
END Option 255, length 0
PAD Option 0, length 0, occurs 23
Everything looks good!!
** Tags removed: verification-needed
** Tags added: verification-done
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1529815
Title:
InfiniBand DHCP flow with PRA and DHCP relay not working
Status in isc-dhcp package in Ubuntu:
Fix Released
Status in isc-dhcp source package in Trusty:
In Progress
Status in isc-dhcp source package in Wily:
Fix Committed
Status in isc-dhcp source package in Xenial:
Fix Committed
Bug description:
[Impact]
* Infiniband users relying on DHCP can't use DHCP relay.
[Test Case]
* Comment #13
* Mellanox has tested themselves.
* Clear way of knowing if fix worked (tcpdump).
[Regression Potential]
* Only related to Infiniband.
* Infiniband support could stop working (unlikely, already tested).
[Other Info]
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1529815/+subscriptions
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