On Fri, Jul 25, 2008 at 4:46 PM, David Hláčik <david@xxxxxxxxx> wrote:
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.
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-matt
Hello guys,to describe my scenarioi 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
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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
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