Запустил через strace. Вот выхлоп.
~ # dhcpd br0
Internet Systems Consortium DHCP Server 4.3.2
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit
https://www.isc.org/software/dhcp/Config file: /opt/etc/dhcpd.conf
Database file: /opt/var/db/dhcpd.leases
PID file: /opt/var/run/dhcpd.pid
Wrote 4 leases to leases file.
Listening on LPF/br0/ec:43:f6:72:a4:18/192.168.100.0/24
Sending on LPF/br0/ec:43:f6:72:a4:18/192.168.100.0/24
Sending on Socket/fallback/fallback-net
~ # strace -p 2158
Process 2158 attached
select(22, [4 5 7], [], NULL, {3488, 0}) = 2 (in [5 7], left {3483, 290000})
gettimeofday({1439273822, 142199}, NULL) = 0
gettimeofday({1439273822, 143474}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\377\377\377\377\377\377\0\26\317\203%\244\10\0E\0\1H\31\215\0\0\200\21 \31\0\0\0\0\377\377"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 342
time([1439273822]) = 1439273822
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<31>Aug 11 09:17:02 dhcpd: reuse"..., 119, MSG_NOSIGNAL) = 119
time([1439273822]) = 1439273822
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<30>Aug 11 09:17:02 dhcpd: DHCPD"..., 78, MSG_NOSIGNAL) = 78
sendto(4, "\10\0\377\32\370\344\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 28, 0, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("192.168.100.13")}, 16) = 28
gettimeofday({1439273822, 160568}, NULL) = 0
gettimeofday({1439273822, 161513}, NULL) = 0
gettimeofday({1439273822, 162034}, NULL) = 0
recvfrom(7, "\1\1\6\0\376\325\365\205\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("0.0.0.0")}, [16]) = 300
gettimeofday({1439273822, 163834}, NULL) = 0
select(22, [4 5 7], [], NULL, {0, 996734}) = 0 (Timeout)
gettimeofday({1439273823, 161429}, NULL) = 0
gettimeofday({1439273823, 161743}, NULL) = 0
gettimeofday({1439273823, 162026}, NULL) = 0
time([1439273823]) = 1439273823
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<30>Aug 11 09:17:03 dhcpd: DHCPO"..., 84, MSG_NOSIGNAL) = 84
write(5, "\0\26\317\203%\244\354C\366r\244\30\10\0E\20\1H\0\0\0\0\200\21\3578\300\250d\376\300\250"..., 342) = 342
gettimeofday({1439273823, 165133}, NULL) = 0
select(22, [4 5 7], [], NULL, {3482, 250717}) = 2 (in [5 7], left {3482, 250717})
gettimeofday({1439273823, 170330}, NULL) = 0
gettimeofday({1439273823, 171121}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\377\377\377\377\377\377\0\26\317\203%\244\10\0E\0\1Q\31\216\0\0\200\21 \17\0\0\0\0\377\377"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 351
time([1439273823]) = 1439273823
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<31>Aug 11 09:17:03 dhcpd: reuse"..., 119, MSG_NOSIGNAL) = 119
time([1439273823]) = 1439273823
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<30>Aug 11 09:17:03 dhcpd: DHCPR"..., 107, MSG_NOSIGNAL) = 107
time([1439273823]) = 1439273823
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<30>Aug 11 09:17:03 dhcpd: DHCPA"..., 82, MSG_NOSIGNAL) = 82
write(5, "\0\26\317\203%\244\354C\366r\244\30\10\0E\20\1H\0\0\0\0\200\21\3578\300\250d\376\300\250"..., 342) = 342
gettimeofday({1439273823, 179926}, NULL) = 0
recvfrom(7, "\1\1\6\0\376\325\365\205\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("0.0.0.0")}, [16]) = 309
gettimeofday({1439273823, 180916}, NULL) = 0
select(22, [4 5 7], [], NULL, {3482, 234934}) = 1 (in [4], left {3481, 260000})
gettimeofday({1439273824, 164345}, NULL) = 0
gettimeofday({1439273824, 164517}, NULL) = 0
recvfrom(4, "E\0\0000\31\217@\0\200\1\226\341\300\250d\r\300\250d\376\0\0\7\33\370\344\0\0\0\0\0\0"..., 1500, 0, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("192.168.100.13")}, [16]) = 48
gettimeofday({1439273824, 165976}, NULL) = 0
select(22, [4 5 7], [], NULL, {3481, 249874}) = 1 (in [4], left {3479, 510000})
gettimeofday({1439273825, 909049}, NULL) = 0
gettimeofday({1439273825, 909226}, NULL) = 0
recvfrom(4, "E\0\0\260\31\225\0\0\200\1\326[\300\250d\r\300\250d\376\3\3C3\0\0\0\0E\0\1J"..., 1500, 0, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("192.168.100.13")}, [16]) = 176
gettimeofday({1439273825, 910762}, NULL) = 0
select(22, [4 5 7], [], NULL, {3479, 505088}) = 2 (in [5 7], left {3474, 500000})
gettimeofday({1439273830, 931128}, NULL) = 0
gettimeofday({1439273830, 932021}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\354C\366r\244\30\0\26\317\203%\244\10\0E\0\1H\32^\0\0\200\21\324\352\300\250d\r\300\250"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 342
time(NULL) = 1439273830
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
time(NULL) = 1439273830
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
time(NULL) = 1439273830
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
time(NULL) = 1439273830
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
write(6, "lease 192.168.100.13 {\n starts "..., 243) = 243
fsync(6) = 0
time([1439273830]) = 1439273830
open("/etc/TZ", O_RDONLY) = 8
read(8, "MSK-3\n", 68) = 6
close(8) = 0
send(3, "<30>Aug 11 09:17:10 dhcpd: DHCPR"..., 96, MSG_NOSIGNAL) = 96
gettimeofday({1439273830, 954340}, NULL) = 0
recvfrom(7, "\1\1\6\0\227Yr\"\0\0\0\0\300\250d\r\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("192.168.100.13")}, [16]) = 300
gettimeofday({1439273830, 955544}, NULL) = 0
select(22, [4 5 7], [], NULL, {3474, 460306}) = 2 (in [5 7], left {3469, 480000})
gettimeofday({1439273835, 942813}, NULL) = 0
gettimeofday({1439273835, 942995}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\377\377\377\377\377\377\0\26\317\203%\244\10\0E\0\1H\32v\0\0\200\21\0370\0\0\0\0\377\377"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 342
gettimeofday({1439273835, 944247}, NULL) = 0
recvfrom(7, "\1\1\6\0~\231\324\324\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("0.0.0.0")}, [16]) = 300
gettimeofday({1439273835, 945468}, NULL) = 0
select(22, [4 5 7], [], NULL, {3469, 470382}) = 2 (in [5 7], left {3466, 470000})
gettimeofday({1439273838, 952391}, NULL) = 0
gettimeofday({1439273838, 953603}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\377\377\377\377\377\377\0\26\317\203%\244\10\0E\0\1H\32w\0\0\200\21\37/\0\0\0\0\377\377"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 342
gettimeofday({1439273838, 956065}, NULL) = 0
recvfrom(7, "\1\1\6\0~\231\324\324\3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("0.0.0.0")}, [16]) = 300
gettimeofday({1439273838, 958664}, NULL) = 0
select(22, [4 5 7], [], NULL, {3466, 457186}) = 2 (in [5 7], left {3458, 460000})
gettimeofday({1439273846, 952931}, NULL) = 0
gettimeofday({1439273846, 953114}, NULL) = 0
recvmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\377\377\377\377\377\377\0\26\317\203%\244\10\0E\0\1H\32x\0\0\200\21\37.\0\0\0\0\377\377"..., 1536}], msg_controllen=28, [{cmsg_len=28, cmsg_level=SOL_PACKET, cmsg_type=8, ...}], msg_flags=0}, 0) = 342
gettimeofday({1439273846, 953877}, NULL) = 0
recvfrom(7, "\1\1\6\0~\231\324\324\v\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\26\317\203"..., 1540, 0, {sa_family=AF_INET, sin_port=htons(68), sin_addr=inet_addr("0.0.0.0")}, [16]) = 300
gettimeofday({1439273846, 954791}, NULL) = 0
select(22, [4 5 7], [], NULL, {3458, 461059}
Похоже после release он не видит или не воспринимает discover.
UPD. На белом не работает.
UPD. На Debiane версия 4.3.2 из тестового пакета нормально работает.