SBS2008 Server's looses network connection

Raz

unread,

Dec 14, 2009, 2:04:01 AM12/14/09

to

Hi All,
I am having a problem with my mail server that I cannot figure out why. The
server runs fine for a few days and then all of a sudden I cannot access to
the server via the network (local or external). When i restart the server, it
seems to sort itself out for awhile and then this will happen again. All
hardware is fine, I have tested everything. Any insight to this would be
grately appreciated.

Bob Lin (MS-MVP)

unread,

Dec 14, 2009, 9:45:29 AM12/14/09

to

We need more information to help. Any errors in the Event Viewer? Or posting
the result of ipconfig /all may help.

--
Bob Lin, Microsoft-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

"Raz" <R...@discussions.microsoft.com> wrote in message
news:9E01B785-C4BB-464E...@microsoft.com...

Raz

unread,

Dec 15, 2009, 2:17:01 AM12/15/09

to

There arent' any errors in the Event Viewer, but i do find it strange that
absolutely nothing gets logged when the server looses the network
connectivity. here is the ipconfig / all

Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network
Connectio
n
Physical Address. . . . . . . . . : 00-15-17-B1-2F-65
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82567LM-2 Gigabit Network
Connec
tion
Physical Address. . . . . . . . . : 00-15-17-B1-2F-64
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::1841:2f25:fcdf:90%10(Preferred)
Link-local IPv6 Address . . . . . : fe80::b284:cba5:b4d:a3cc%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 218109207
DHCPv6 Client DUID. . . . . . . . :
00-01-00-01-11-FB-86-FC-00-15-17-B1-2F-64

DNS Servers . . . . . . . . . . . : fe80::b284:cba5:b4d:a3cc%10
216.146.35.35
216.146.36.36
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 8:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . :
isatap.{3D668BB5-62BF-4872-9EA2-3E6BA83BA
7AD}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . :
isatap.{C4EBF737-188A-466F-9956-F48B2603E
7C7}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Bob Lin (MS-MVP)

unread,

Dec 15, 2009, 8:57:58 AM12/15/09

to

The DNS could be the problem. It is recommended to use internal DNS instead
of ISP DNS. Also disable IPv6 for a test. Please post back with the result.

--
Bob Lin, Microsoft-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

"Raz" <R...@discussions.microsoft.com> wrote in message

news:6A614979-FD19-4EEE...@microsoft.com...

Raz

unread,

Dec 15, 2009, 1:02:01 PM12/15/09

to

Hi Bob,
yea I changed that today and ran the Fix my network app in the SBS Console.
The DNS and DNS reverse lookup were corrupt so it reinitialized that. I found
that when i disable my IPv6 my exchange doesn't work at all. Thanks for the
help will let you know if the dns fix sorted everything out.

Bob Lin (MS-MVP)

unread,

Dec 15, 2009, 6:33:58 PM12/15/09

to

Sorry, it is not recommended to disable IPv6 on windows SBS 2008. However,
for a test, we can disable it temporarily. This how to may help: How to
disable IPv6 on a Windows Server 2008 -
http://www.howtonetworking.com/Windows/win2008disableipv6.htm

--
Bob Lin, Microsoft-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

"Raz" <R...@discussions.microsoft.com> wrote in message

news:B6B64BBE-3A99-4720...@microsoft.com...

Raz

unread,

Dec 16, 2009, 11:44:02 AM12/16/09

to

Hi Bob, ok i will try disable the IPv6 as soon as the server comes back on
because what i did, did not fix it, its now happened twice in one day.