active directory over multiple vlans

I have the following AD structure:

1 forest with 1 DC/GC
6 multiple sub-domains on six different vlans.  su-domain 1 is on same subnet as the dc/gc
currently, only one wins and dns server and that is on the dc/gc

from network neighborhood, I can only see the dc/gc and sub-domain 1, which is on the same vlan as the dc/gc.  I can't see the other sub-domains, yet, replication, dns lookup and ping works to the other domains.  I need to get this resolved as a server application that I am running depends on windows enumeration of the domains.  Can someone tell me why this is happening and what I need to do to resolve this issue?
txagcol1Asked:
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Henrik JohanssonSystems engineerCommented:
Browsing is using NetBIOS which is not routable if not enabling NetBIOS over TCP/IP (NetBT) or the clients is configured to use WINS.

Not related to the browsing issue, but as described in the question, you should also configure atleast 2 servers as GC in each AD-site and atleast 2 DNS servers to get redundancy and avoid SPOF when the single GC/DNS is restarted. Configure each DC acting as DNS to use another DNS as secondary DNS.
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txagcol1Author Commented:
so, you're saying that we should not be using wins?  As for the second issue, I agree.  Just have had time to do the other implermentations.
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Henrik JohanssonSystems engineerCommented:
No, WINS is used for browsing.
If you have multiple WINS servers, you nead to configure them to use the other servers as replicating partners.
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