DNS server has encountered a critical error from the AD

[guest]

pls suggest for this issue

C:\Documents and Settings\kmanage>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : SBS-SERVER1
Primary Dns Suffix . . . . . . . : pdhlan.local
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : pdhlan.local
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : VMware Accelerated AMD PCNet Adapter
Physical Address. . . . . . . . . : 00-0C-29-64-10-B6
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.1.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.2
C:\Documents and Settings\kmanage>dcdiag/test:dns
Domain Controller Diagnosis
Performing initial setup:
Done gathering initial info.
Doing initial required tests
Testing server: Default-First-Site-Name\SBS-SERVER1
Starting test: Connectivity
The host 56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local could
not be resolved to an
IP address. Check the DNS server, DHCP, server name, etc
Although the Guid DNS name
(56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local) couldn't be
resolved, the server name (SBS-SERVER1.pdhlan.local) resolved to the
IP address (192.168.1.2) and was pingable. Check that the IP address
is registered correctly with the DNS server.
......................... SBS-SERVER1 failed test Connectivity
Doing primary tests
Testing server: Default-First-Site-Name\SBS-SERVER1
DNS Tests are running and not hung. Please wait a few minutes...
Running partition tests on : ForestDnsZones
Running partition tests on : DomainDnsZones
Running partition tests on : Schema
Running partition tests on : Configuration
Running partition tests on : pdhlan
Running enterprise tests on : pdhlan.local
Starting test: DNS
Test results for domain controllers:
DC: SBS-SERVER1.pdhlan.local
Domain: pdhlan.local
TEST: Basic (Basc)
Error: No LDAP connectivity
TEST: Forwarders/Root hints (Forw)
Error: Root hints list has invalid root hint server: a.root-se
rvers.net. (198.41.0.4)
Error: Root hints list has invalid root hint server: b.root-se
rvers.net. (192.228.79.201)
Error: Root hints list has invalid root hint server: c.root-se
rvers.net. (192.33.4.12)
Error: Root hints list has invalid root hint server: d.root-se
rvers.net. (128.8.10.90)
Error: Root hints list has invalid root hint server: e.root-se
rvers.net. (192.203.230.10)
Error: Root hints list has invalid root hint server: f.root-se
rvers.net. (192.5.5.241)
Error: Root hints list has invalid root hint server: g.root-se
rvers.net. (192.112.36.4)
Error: Root hints list has invalid root hint server: h.root-se
rvers.net. (128.63.2.53)
Error: Root hints list has invalid root hint server: i.root-se
rvers.net. (192.36.148.17)
Error: Root hints list has invalid root hint server: j.root-se
rvers.net. (192.58.128.30)
Error: Root hints list has invalid root hint server: k.root-se
rvers.net. (193.0.14.129)
Error: Root hints list has invalid root hint server: l.root-se
rvers.net. (198.32.64.12)
Error: Root hints list has invalid root hint server: l.root-se
rvers.net. (199.7.83.42)
Error: Root hints list has invalid root hint server: m.root-se
rvers.net. (202.12.27.33)
TEST: Delegations (Del)
Error: DNS server: sbs-server1.pdhlan.local. IP:192.168.1.2 [B
roken delegated domain _msdcs.pdhlan.local.]
TEST: Records registration (RReg)
Network Adapter [00000002] VMware Accelerated AMD PCNet Adapte
r:
Error: Missing CNAME record at DNS server 192.168.1.2 :
56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local
Error: Missing DC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.dc._msdcs.pdhlan.local
Error: Missing GC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.gc._msdcs.pdhlan.local
Error: Missing PDC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.pdc._msdcs.pdhlan.local
Error: Record registrations cannot be found for all the network a
dapters
Summary of test results for DNS servers used by the above domain contro
llers:
DNS server: 128.63.2.53 (h.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 128.63.2.53
DNS server: 128.8.10.90 (d.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 128.8.10.90
DNS server: 192.112.36.4 (g.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.112.36.4
DNS server: 192.168.1.2 (sbs-server1.pdhlan.local.)
1 test failure on this DNS server
Delegation is broken for the domain _msdcs.pdhlan.local. on the D
NS server 192.168.1.2
DNS server: 192.203.230.10 (e.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.203.230.10
DNS server: 192.228.79.201 (b.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.228.79.201
DNS server: 192.33.4.12 (c.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.33.4.12
DNS server: 192.36.148.17 (i.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.36.148.17
DNS server: 192.5.5.241 (f.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.5.5.241
DNS server: 192.58.128.30 (j.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 192.58.128.30
DNS server: 193.0.14.129 (k.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 193.0.14.129
DNS server: 198.32.64.12 (l.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 198.32.64.12
DNS server: 198.41.0.4 (a.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 198.41.0.4
DNS server: 199.7.83.42 (l.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 199.7.83.42
DNS server: 202.12.27.33 (m.root-servers.net.)
1 test failure on this DNS server
This is not a valid DNS server. PTR record query for the 1.0.0.12
7.in-addr.arpa. failed on the DNS server 202.12.27.33
Summary of DNS test results:
Auth Basc Forw Del Dyn RReg Ext
________________________________________________________________
Domain: pdhlan.local
SBS-SERVER1 PASS FAIL FAIL FAIL PASS FAIL n/a
......................... pdhlan.local failed test DNS
C:\Documents and Settings\kmanage>^A

[guest]

Is it a SBS server? The root hints failure seems to be the cause of DNS forwarder being missing or wrong public DNS IP has been configured. Contact your ISP and get a valid dns forwarder and also enable secure update.

Secure dynamic update is also not been enabled.


http://support.microsoft.com/kb/814591

[guest]

Error: Missing CNAME record at DNS server 192.168.1.2 :

56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local
Error: Missing DC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.dc._msdcs.pdhlan.local
Error: Missing GC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.gc._msdcs.pdhlan.local
Error: Missing PDC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.pdc._msdcs.pdhlan.local "
I would also try to recreate AD specific records on your DNS server. Try to run these commands

ipconfig /flushdns
ipconfig /registerdns
dcdiag /fix or netdiag /fix (if Windows 2003)
nltest /DSregDNS (if 2003 install Support Tools from CD#1 first)

reboot DC and rerun dcdiag


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Regards, Krzysztof ---- Visit my blog at http://kpytko.wordpress.com

[guest]

--As per the IPCONFIG result, IP configuration and DNS pointing is proper.

--In DCDIAG,
1) GUID name rsolution error:
(56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local) couldn't be
resolved, the server name (SBS-SERVER1.pdhlan.local) resolved to the
IP address (192.168.1.2) and was pingable. Check that the IP address
is registered correctly with the DNS server.

2) MIssing DNS record error:
Error: Missing CNAME record at DNS server 192.168.1.2 :
56572edf-a241-44f5-af9e-74ec725bf569._msdcs.pdhlan.local
Error: Missing DC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.dc._msdcs.pdhlan.local
Error: Missing GC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.gc._msdcs.pdhlan.local
Error: Missing PDC SRV record at DNS server 192.168.1.2 :
_ldap._tcp.pdc._msdcs.pdhlan.local

Resolution:
1)Contact your ISP and get valid DNS IPs from them and add it in to the DNS forwarders.
Do not set public DNS server IP in TCP/IP setting of DC.
2)Make sure the IPv6 is configured to dynamic (Automatically) in TCP/IPv6 setting.
3)open cammand promt and run "ipconfig /flushdns & ipconfig /registerdns" & "dcdiag /fix"
4)start > run "services.msc" and restart DNS server and NETLOGON service.


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