DNS across VLANs

Question

Hey, 
 
 So I have this DHCP

VLANS all like this

and DNS like this

From any computer in VLAN 100 I can ping another computer in VLAN100 like this 
 
 ping cws-yellow-room 
 
 But, if I try to ping a server (by name and not IP) that is on a different vlan (vlan200) it can't resolve the name. 
 
 I.e. how can I can the DNS to work across the VLANS.... 
 
 Note: I have added a record to the 'DNS Host Entry' section to line the name to the IP and that did nothing so I removed it again..... 
 
 Thanks!

rfcat_vk · Accepted Answer

Hi, 
 you need to add the entries to the DNS host and changer your DNS servers on your DHCP server to be the network address of your VLAN in each case. 
 Ian 
 i forgot, you will also need a lan, any lan any allow all rule.

jprusch · Answer

Hello Robin, 
 as Dirk Kotte already wrote: you need FQDN for this to work. NetBIOS names won't work. 
 FQDN = cws-server-01.domain.internal (with "domain.internal" being your internal domain suffix) 
 NetBIOS = cws-server-01 
 Windows Clients normally add "their" DNS-Suffix to the hostname, if this is configured. 
 That's the reason it sometimes "seems to work" without FQDN.

jprusch · Answer

There is a DHCP option to set the domain name: option 15 = domain name. This is the DNS type of name = domain.internal, not onle "domain" With windows clients it has been a good practise to set the node type with DHCP option 46 to "H-node" (Hybrid) = 8 
 This forces the windows clients to use DNS and NetBIOS.

DNS across VLANs

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