[server] DHCP is ok but I can't ping

Code:

em1       Link encap:Etheet  HWaddr 98:4b:e1:0c:7c:a2
          inet addr:172.30.14.6  Bcast:172.30.14.255  Mask:255.255.255.0
          inet6 addr: fe80::9a4b:e1ff:fe0c:7ca2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:102281907 errors:0 dropped:0 overruns:0 frame:0
          TX packets:45958367 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:140250565446 (140.2 GB)  TX bytes:12155339470 (12.1 GB)

em2       Link encap:Etheet  HWaddr 98:4b:e1:0c:7c:a4
          inet addr:172.30.14.7  Bcast:172.30.14.255  Mask:255.255.255.0
          inet6 addr: fe80::9a4b:e1ff:fe0c:7ca4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10492 errors:0 dropped:0 overruns:0 frame:0
          TX packets:82 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:751294 (751.2 KB)  TX bytes:26432 (26.4 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:197 errors:0 dropped:0 overruns:0 frame:0
          TX packets:197 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:70244 (70.2 KB)  TX bytes:70244 (70.2 KB)

Code:

# Sample /etc/dhcpd.conf
default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 172.30.14.254;
option routers 172.30.14.1;
option domain-name-servers 62.2.17.60, 62.2.24.158;
option domain-name "mydomain.example";
subnet 172.30.14.0 netmask 255.255.255.0 {
    range 172.30.14.10 172.30.14.20;
}

Code:

# Sample /etc/dhcpd.conf
default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 172.30.14.254;
option routers 172.30.14.1;
option domain-name-servers 62.2.17.60, 62.2.24.158;
option domain-name "mydomain.example";
subnet 172.30.14.0 netmask 255.255.255.0 {
    range 172.30.14.10 172.30.14.20;
}

Code:

From 172.30.14.6 icmp_seq=16 Destination Host Unreachable
From 172.30.14.6 icmp_seq=17 Destination Host Unreachable
From 172.30.14.6 icmp_seq=18 Destination Host Unreachable
From 172.30.14.6 icmp_seq=19 Destination Host Unreachable
From 172.30.14.6 icmp_seq=20 Destination Host Unreachable
From 172.30.14.6 icmp_seq=21 Destination Host Unreachable
From 172.30.14.6 icmp_seq=22 Destination Host Unreachable