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DNS across VLANs

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!



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  • Ok, so after all the help from below, it kind of works......

    I changed the DNS on the DHCP etc and added the DNS Host entry on the XGS  and the NSLOOKUP works but I always need to add a '.' to the end of the server name for ping and folder shares

    It seems like the sophos DNS suffix is different to the one of the computers? I.e. the computers don't have one.... but when I add the full stop it treats it differently and can resolve the name to the IP..... I believe adding the full stop forces it to be treated as a fully qualified domain name.

    Thoughts? Is there a 'suffix' on the sophos DNS?

  • Do you configure the "domain name" within DHCP?

    DNS normally need the FQHN ... mean name+domain-name.

    Using short names (only the hostname)  is using netbios/broadcasts ... or try to add the domain-suffix for DNS.

    Between hostname and DNS-suffix you have to place a dot ... without suffix (empty suffix) it should look like "hostname." 


    Dirk

    Systema Gesellschaft für angewandte Datentechnik mbH  // Sophos Platinum Partner
    Sophos Solution Partner since 2003
    If a post solves your question, click the 'Verify Answer' link at this post.

  • Interesting, on the mac the '.' is not required on the w10 PC it is.

    Ian

    XG115W - v20 GA - Home

    XG on VM 8 - v20 GA

    If a post solves your question please use the 'Verify Answer' button.

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