On Fri, Jul 25, 2008 at 4:46 PM, David Hláčik <david at hlacik.eu> wrote: > Hello guys, > > to describe my scenario > > i have 4 VLANS on my switch, each VLAN is different subject. I have one > DHCP server for 3 VLANS + second one DHCP server for 1 VLAN - named VLAN 7 . > > Problem is , this started to make problems suddenly. VLAN 7 is not > recieving IP adress from correct DHCP server . On DHCP server where > declaration for subnet is configured, i am recieving this message : > > Jul 25 12:38:47 boss dhcpd: DHCPNAK on 10.123.42.169 to 00:16:cf:93:1f:33 > via eth0 > Jul 25 12:38:52 boss dhcpd: DHCPREQUEST for 10.123.42.169 from > 00:16:cf:93:1f:33 via eth0: wrong network. > > How can i solve it and what does it mean? > > I am using authoritative clausule in each subnet deffinition. > > Thanks in advance! > > David > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > If VLAN 7 has access to the VLAN that the primary dhcp server is on, you need to somehow block dhcp requests. What I did was besides using VLAN's on my switches, I have a Sonicwall firewall which handles the actual routing between vlans, then I set certain vlans to use the first dhcp server via a dhcp helper in the firewall. Then in the other vlan I point the dhcp helper at the second dhcp server. -- -matt -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080725/34593664/attachment-0003.html>