I can confirm the bug description.
Ubuntu 16.04.2 LTS
isc-dhcp-server 4.3.3-5ubuntu12.6
dhcpd.conf used:
subnet 192.168.255.0 netmask 255.255.255.0
{
range dynamic-bootp 192.168.255.2 192.168.255.99;
allow bootp;
if substring (option vendor-class-identifier, 0, 10) = "AM335x ROM"
{
filename "barebox-mlo.img";
}
elsif substring (option vendor-class-identifier, 0, 10) = "am335x bar"
{
filename "barebox.img";
}
range 192.168.255.100 192.168.255.199;
}
Trying to boot the second target sends the BOOTREPLY to the MAC of the first
target:
Mar 23 16:42:26 ubuntu dhcpd[30055]: BOOTREQUEST from 98:5d:ad:45:bf:4d via
ens39
Mar 23 16:42:26 ubuntu dhcpd[30055]: BOOTREPLY on 192.168.255.2 to
98:5d:ad:45:65:bc via ens39
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https://bugs.launchpad.net/bugs/1665264
Title:
isc-dhcp-server 4.3.3-5ubuntu12.6 BOOTREPLY to wrong MAC address
Status in isc-dhcp package in Ubuntu:
Confirmed
Bug description:
I am testing network boot on several embedded targets using BOOTP from
the isc-dhcp-server package using Ubuntu 16.04.2.
The /etc/dhcp/dhcpd.conf I modified looks like this:
subnet 192.168.3.0 netmask 255.255.255.0
{
# The filenames must correspond to the barebox and MLO files which are
placed in the /tftpboot directory
range dynamic-bootp 192.168.3.11 192.168.3.100;
if substring (option vendor-class-identifier, 0, 10) = "AM335x ROM"
{
filename "MLO";
}
elsif substring (option vendor-class-identifier, 0, 18) = "am335x
barebox-mlo"
{
filename "barebox.bin";
}
range 192.168.3.101 192.168.3.199;
}
Booting the first target does work out of the box with no issues:
Feb 16 09:11:38 lws-xxxx dhcpd[4259]: BOOTREPLY on 192.168.3.13 to
68:c9:0b:4a:3c:fe via enp5s2
Feb 16 09:11:46 lws-xxxx dhcpd[4259]: reuse_lease: lease age 63582 (secs)
under 25% th
Feb 16 09:11:46 lws-xxxx dhcpd[4259]: BOOTREQUEST from 68:c9:0b:1c:74:8c via
enp5s2
And then the booting works..
Trying to boot the second target (different board with different MAC)
does not work any more:
Feb 16 09:16:12 lws-xxxx dhcpd[4259]: BOOTREQUEST from 68:c9:0b:1c:74:8c via
enp5s2
Feb 16 09:16:12 lws-xxxx dhcpd[4259]: BOOTREPLY on 192.168.3.13 to
68:c9:0b:4a:3c:fe via enp5s2
The dhcp receives the request but replies to the MAC of the first
target. I see the same when trying the third, forth target and so on.
The dhcp always replies to the MAC of the first target.
This did work with the same configuration setup on Ubuntu 14.04.5 with
4.2.4-7ubuntu12.8.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1665264/+subscriptions
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