DHCP-DNS

[B16]

Hi,

It seems that that there are a lot of threads going on about "slow logon" problems, DNS problems, etc... and I'm also troubleshooting a lot of these problems, but until now I' can't find a proper sollution, so I hope that one of you guys can help me out here. The situation is as follows;

Cisco router (DHCP server)
Win2003 SBS server
4 XPpro clients
2 Win2000 clients

All XPpro clients are having the "Slow logon" syndrome
the IPCONFIG of an XP client gives me the following information;

Dhcp enabled; YES
Ip-address: 172.168.0.3
Subnetmask: 255.255.255.0
Default gateway:192.168.0.254
DHCP server: 192.168.0.254
DNS servers: 193.121.171.135
193.74.208.65
193.74.208.135

The IPconfig of the SBS-Server;
DHCP enabled; NO
IP address; 192.168.0.100
Subnet mask:255.255.255.0
dafault gateway;192.168.0.254
DNS seevers;193.121.171.135
192.168.0.100
193.74.208.65
193.74.208.135
Primary WINS Server: 192.168.0.100

So, on the XP client I don't see the Servers IP-adsress in the DNS list and I think this could be the reason of the "slow Logon"syndrome, or am I wrong? If not how can I change it?

Many thanks in advance!!

 

[Larsdemo]

Why dont you make the sbs server dns server and point the clients to the sbs server and make it foreward requests for internet to the dns server at your provider this way the login wil improve cause the sbs server is found imidiately.

Lars

Network admin for worldwide freight forwarders company.
mcp mcsa\: Messaging mcse -2003

 

[B16]

Hi Lars,

Could you tell me how to do that, because I'm a bit novice here..

Thanks in advance!!

 

[Larsdemo]

I dont know SBS at all, i asume it's the same as a domaincontroller but then smaller, and the sbs server holds your domain, mydomain.com, if this is the case then add\remove a role (or config software add windows component) install dns and make a zone mydomain.com. Then rightclick the servername in dns console and go to forwarders tab and "select domains forwarder ip address list" add the dns servers of you isp.

You can do this on multiple servers for redundancy.

Network admin for worldwide freight forwarders company.
mcp mcsa\: Messaging mcse -2003

 

[twwabw]

The reason for your slow logons is both your DNS and DHCP configuration. As the above poster indicated, you need to set up DNS on the SBS server. Do not use the Cisco as the DHCP server.

It also appears your clients are on a different subnet? Why is this? In any case, for AD clients to resolve properly, DNS has to be working. Your SBS server should be both the DHCP server, as well as the ONLY dns server used by your clients. Use DHCP to hand out the IP address of your SBS server for DNS. Then, in DNS, configure DNS forwarders to forward internet resolution queries to your ISP DNS servers. In the server configuration, its TCP/IP configuration should only point to ITSELF for DNS, and NOT to your ISP servers. No exceptions.

Use the SBS wizards to do these things for you. They make it simple, and ask all the right questions.

 

[gstar1703]

My 2pence worth!
After following the excellent instructions above you should have something like this -

Dhcp enabled; YES
Ip-address: 172.168.0.3 - Should be a 192.168.0.*
Subnetmask: 255.255.255.0
Default gateway:192.168.0.254 - Your router or firewall?
DHCP server: 192.168.0.254 - Should be 192.168.0.100
DNS servers: 193.121.171.135 - Should be 192.168.0.100
193.74.208.65 - Dont need
193.74.208.135 - Dont need

The IPconfig of the SBS-Server;
DHCP enabled; NO
IP address; 192.168.0.100
Subnet mask:255.255.255.0
dafault gateway;192.168.0.254 - Your router or firewall?
DNS servers;193.121.171.135 - Should be 192.168.0.100
192.168.0.100 - Dont need
193.74.208.65 - Dont need
193.74.208.135 - Dont need
Primary WINS Server: 192.168.0.100

Cheers
G

 

[Larsdemo]

yes thats it dont forget to make scope options in dhcp that give the clients the ipconfig they need and this wil work like hell.
You could make another server (if there is) also dns server for redundantie.

Regards Lars

Network admin for worldwide freight forwarders company.
mcp mcsa\: Messaging mcse -2003