title: DHCP on Centos7 error
body: <p>I was looking my dhcp log and found a few errors.
  No idea what are those.</p>
  
  <p>Any chance someone knows ?
  Feb  9 15:55:05 cyberzen dhcpd: DHCPINFORM from 10.0.0.13 via eno33557248
  Feb  9 15:55:05 cyberzen dhcpd: DHCPACK to 10.0.0.13 (6c:f0:49:f8:e6:f4) via eno33557248
  Feb  9 15:55:05 cyberzen dhcpd: send_packet: Operation not permitted
  Feb  9 15:55:05 cyberzen dhcpd: dhcp.c:1387: Failed to send 313 byte long packet over fallback interface.
  Feb  9 15:55:06 cyberzen NetworkManager[692]:  [1455040506.860833] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:07 cyberzen dhcpd: DHCPREQUEST for 10.0.0.16 from 50:e5:49:f6:2b:1e (08194D-CYBERZEN) via eno33557248
  Feb  9 15:55:07 cyberzen dhcpd: DHCPACK on 10.0.0.16 to 50:e5:49:f6:2b:1e (08194D-CYBERZEN) via eno33557248
  Feb  9 15:55:07 cyberzen dhcpd: send_packet: Operation not permitted
  Feb  9 15:55:07 cyberzen dhcpd: dhcp.c:3319: Failed to send 300 byte long packet over fallback interface.
  Feb  9 15:55:08 cyberzen dhcpd: DHCPINFORM from 10.0.0.13 via eno33557248
  Feb  9 15:55:08 cyberzen dhcpd: DHCPACK to 10.0.0.13 (6c:f0:49:f8:e6:f4) via eno33557248
  Feb  9 15:55:08 cyberzen dhcpd: send_packet: Operation not permitted
  Feb  9 15:55:08 cyberzen dhcpd: dhcp.c:1387: Failed to send 313 byte long packet over fallback interface.
  Feb  9 15:55:10 cyberzen NetworkManager[692]:  [1455040510.857309] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:14 cyberzen NetworkManager[692]:  [1455040514.861433] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:15 cyberzen dhcpd: DHCPREQUEST for 10.0.0.16 from 50:e5:49:f6:2b:1e (08194D-CYBERZEN) via eno33557248
  Feb  9 15:55:15 cyberzen dhcpd: DHCPACK on 10.0.0.16 to 50:e5:49:f6:2b:1e (08194D-CYBERZEN) via eno33557248
  Feb  9 15:55:15 cyberzen dhcpd: send_packet: Operation not permitted
  Feb  9 15:55:15 cyberzen dhcpd: dhcp.c:3319: Failed to send 300 byte long packet over fallback interface.
  Feb  9 15:55:18 cyberzen NetworkManager[692]:  [1455040518.861652] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:22 cyberzen NetworkManager[692]:  [1455040522.860815] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:26 cyberzen NetworkManager[692]:  [1455040526.860962] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:30 cyberzen NetworkManager[692]:  [1455040530.861108] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.
  Feb  9 15:55:34 cyberzen NetworkManager[692]:  [1455040534.861243] [rdisc/nm-lndp-rdisc.c:251] send_rs(): (eno33557248): cannot send router solicitation: -99.</p>