Dotaz: DHCP - problem s DHCPNAK

[Ihi]

Cau, mam problem s DHCP serverem. I kdyz je nastaven jako authoritativni, tak neposila DHCPNAK pro klienty, kteri maji rozsah jiny nez, ktery nabizi on. Vygooglovat se mi bohuzel nic moc nepodarilo - nema nekdo zkusenosti? Zvlastni je ze pro nejake stroje to funguje a pro nejake ne :-/.

Jedna se o ISC DHCP 3.0.2

Konfigurak dhcpd.conf

"
ddns-update-style none;
ddns-updates off;

authoritative;

option domain-name "XXX.XXX.cz";
option domain-name-servers XXX.XXX.XXX.2, XXX.XXX.XXX.2;
option routers XXX.XXX.XXX.1;

option ntp-servers XXX.XXX.XXX.XXX;
option log-servers XXX.XXX.XXX.XXX;

default-lease-time 3600;
max-lease-time 3600;

boot-unknown-clients false;
deny unknown-clients;

subnet XXX.XXX.XXX.0 netmask 255.255.254.0 {
  option subnet-mask 255.255.254.0;
  option broadcast-address XXX.XXX.XXX.255;

  host nejakyhost { hardware ethernet 00:01:xx:xx:xx:xx; fixed-address nejakyhost.xxxx.cz; }

... cca 500 hostu ...
}
"

ukazka logu pro nefunkcni DHCPNAK

"...
Nov 20 07:19:31 dns dhcpd: DHCPREQUEST for 192.168.2.120 from 00:c0:9f:xx:xx:xx via eth0: unknown lease 192.168.2.120.
Nov 20 07:19:36 dns dhcpd: DHCPREQUEST for 192.168.2.120 from 00:c0:9f:xx:xx:xx via eth0: unknown lease 192.168.2.120.
...
Nov 20 07:19:45 dns dhcpd: DHCPREQUEST for 192.168.2.120 from 00:c0:9f:xx:xx:xx via eth0: unknown lease 192.168.2.120.
...
Nov 20 07:22:39 dns dhcpd: DHCPDISCOVER from 00:c0:9f:xx:xx:xx via eth0
Nov 20 07:22:39 dns dhcpd: DHCPOFFER on XXX.XXX.6.52 to 00:c0:9f:xx:xx:xx via eth0
Nov 20 07:22:39 dns dhcpd: DHCPREQUEST for XXX.XXX.6.52 (XXX.XXX.6.2) from 00:c0:9f:xx:xx:xx via eth0
Nov 20 07:22:39 dns dhcpd: DHCPACK on XXX.XXX.6.52 to 00:c0:9f:xx:xx:xx via eth0
..."

ukazka logu pro funkcni DHCPNAK

"...
Nov 20 12:50:28 dns dhcpd: DHCPREQUEST for 192.168.2.101 from 00:00:e2:xx:xx:xx via eth0: wrong network.
Nov 20 12:50:28 dns dhcpd: DHCPNAK on 192.168.2.101 to 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:30 dns dhcpd: DHCPDISCOVER from 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:30 dns dhcpd: DHCPOFFER on XXX.XXX.6.90 to 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:30 dns dhcpd: DHCPREQUEST for XXX.XXX.6.90 (XXX.XXX.6.2) from 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:30 dns dhcpd: DHCPACK on XXX.XXX.6.90 to 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:40 dns dhcpd: DHCPREQUEST for XXX.XXX.6.90 from 00:00:e2:xx:xx:xx via eth0
Nov 20 12:50:40 dns dhcpd: DHCPACK on XXX.XXX.6.90 to 00:00:e2:xx:xx:xx via eth0
..."

Diky za kazdy napad Ihi

Odpovědi

[ivan]

Jestli to dobre chapu, tak ti vadi, ze klienti dlouho cekaji, nez dostanou spravnou IP adresu od serveru. Zkousel jsi dat "authoritative" i do segmentu, ze kteryho ty packety chodi?
DHCPD se muze chovat rozdilne, pokud packety prijimas pres agenta. Chova se to stejne, kdyz ty requsty chodi primo, jako kdyz ty packety chodi pres ip helper?