In urma cu cateva ore m-am trezit ca dhcpd-ul da urmatoarea eroare: 

Sep 15 01:51:39 t13 dhcpd: DHCPACK on 10.13.0.12 to 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:51:39 t13 dhcpd: *DHCPDECLINE* on 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:51:49 t13 dhcpd: DHCPDISCOVER from 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:51:49 t13 dhcpd: DHCPOFFER on 10.13.0.12 to 00:0f:b0:09:6d:80 via 
eth2 
Sep 15 01:51:49 t13 dhcpd: DHCPREQUEST for 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:51:49 t13 dhcpd: DHCPACK on 10.13.0.12 to 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:51:49 t13 dhcpd: *DHCPDECLINE* on 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:51:59 t13 dhcpd: DHCPDISCOVER from 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:51:59 t13 dhcpd: DHCPOFFER on 10.13.0.12 to 00:0f:b0:09:6d:80 via 
eth2 
Sep 15 01:51:59 t13 dhcpd: DHCPREQUEST for 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:51:59 t13 dhcpd: DHCPACK on 10.13.0.12 to 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:51:59 t13 dhcpd: *DHCPDECLINE *on 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:52:09 t13 dhcpd: DHCPDISCOVER from 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:52:09 t13 dhcpd: DHCPOFFER on 10.13.0.12 to 00:0f:b0:09:6d:80 via 
eth2 
Sep 15 01:52:09 t13 dhcpd: DHCPREQUEST for 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
Sep 15 01:52:09 t13 dhcpd: DHCPACK on 10.13.0.12 to 00:0f:b0:09:6d:80 via eth2 
Sep 15 01:52:09 t13 dhcpd: *DHCPDECLINE* on 10.13.0.12 from 00:0f:b0:09:6d:80 
via eth2 
............... 
pe reteaua interna nu face nimeni spoof pt mac, asta e sigur, ii cunosc pe toti 
si sunt foarte putini deocamdata. 
configurarea sistemului suna ceva de genu: 

dhcpd.conf 

t13:~# cat /etc/dhcpd.conf 
# 
# Sample configuration file for ISC dhcpd for Debian 
# 
# $Id: dhcpd.conf,v 1.4.2.2 2002/07/10 03:50:33 peloy Exp $ 
# 

# option definitions common to all supported networks... 
authoritative; 
max-lease-time 3600; 
option domain-name-servers 10.13.0.1, 81.180.223.1, 81.180.222.254; 
option netbios-node-type 1; 

group { 
option domain-name "**cenzurat"; 
subnet 10.13.0.0 netmask 255.255.255.0{ 
       option subnet-mask 255.255.255.0; 
       option broadcast-address 10.13.0.255; 
       option routers 10.13.0.1; 

    host t13-2 {#Stanciu  (1) 
            hardware ethernet 00:11:5b:75:e6:ae; 
            fixed-address 10.13.0.2; 
            } 
    host t13-3 {#Stanciu1 (2) 
            hardware ethernet 00:01:6c:cd:17:57; 
            fixed-address 10.13.0.3; 
            } 
    host t13-4 {#Stanciu2 (3) 
            hardware ethernet 00:40:f4:ed:54:8a; 
            fixed-address 10.13.0.4; 
            } 
    host t13-5 {#Stanciu3 (4) 
            hardware ethernet 00:30:4f:23:63:32; 
            fixed-address 10.13.0.5; 
            } 
    host t13-6 {#Stanciu4 (5) 
            hardware ethernet 00:11:2f:ca:66:bf; 
            fixed-address 10.13.0.6; 
            } 

    host t13-7 {#Switch1 (6) 
            hardware ethernet 00:11:3b:02:81:88; 
            fixed-address 10.13.0.7; 
            } 

    host t13-8 {#Stanciu5 (7) 
            hardware ethernet 00:11:d8:03:23:7f; 
            fixed-address 10.13.0.9; 
            } 
    host t13-9 {#Stanciu21 (8) 
            hardware ethernet 00:02:44:6c:72:24; 
            fixed-address 10.13.0.10; 
            } 
    host t13-10 {#Stanciu22 (9) 
            hardware ethernet 00:40:d0:8f:14:32; 
            fixed-address 10.13.0.11; 
            } 
    host t13-11 {#Lefter Andrei (10) 
            hardware ethernet 00:0f:b0:09:6d:80; 
            fixed-address 10.13.0.12; 
            } 
    host t13-12 {#Sahlian Cristina (11) 
            hardware ethernet 00:50:fc:8c:34:07; 
            fixed-address 10.13.0.13; 
            } 
    host t13-13 {#Leonici  (12) 
            hardware ethernet 00:04:61:4c:bf:58; 
            fixed-address 10.13.0.14; 
            } 
    host t13-14 {#Sticea Andrei  (13) 
            hardware ethernet 00:13:8f:09:60:65; 
            fixed-address 10.13.0.15; 
            } 
} 
} 
ifconfig: eth1--internet; eth2---local(lan) 
eth1      Link encap:Ethernet  HWaddr 00:04:75:FC:DD:97 
          inet addr:10.0.0.13  Bcast:10.0.0.255  Mask:255.255.0.0 
          inet6 addr: fe80::204:75ff:fefc:dd97/64 Scope:Link 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
          RX packets:6422917 errors:0 dropped:0 overruns:1 frame:0 
          TX packets:7967253 errors:0 dropped:0 overruns:0 carrier:0 
          collisions:0 txqueuelen:1000 
          RX bytes:625932270 (596.9 MiB)  TX bytes:4163695005 (3.8 GiB) 
          Interrupt:169 Base address:0xb800 

eth2      Link encap:Ethernet  HWaddr 00:04:75:FC:DA:EE 
          inet addr:10.13.0.1  Bcast:10.13.0.255  Mask:255.255.255.0 
          inet6 addr: fe80::204:75ff:fefc:daee/64 Scope:Link 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
          RX packets:7983334 errors:0 dropped:0 overruns:1 frame:0 
          TX packets:6371553 errors:0 dropped:0 overruns:0 carrier:0 
          collisions:0 txqueuelen:1000 
          RX bytes:4165305871 (3.8 GiB)  TX bytes:623848240 (594.9 MiB) 
          Interrupt:201 Base address:0xb400 
....... 

serverul de dhcpd lucreaza numai pe eth2:  /usr/sbin/dhcpd -q eth2 

cateodata merge bine, dar dupa un timp incepe sa nu mai aloce ip-dar numai pt 
unele ip-uri, nu la toate mi se intampla asta. 
puteti sa ma ajutati? 
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