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Connection to Domain controller fails, Ping fails

Posted on 2011-03-10
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Last Modified: 2013-11-13
Have SBS2003 and 2003  terminal server on a local lan connected through a CiscoASA (two ports on same VLAN).

Recently changed IPs on SBS and since get occasionall lost connection from Terminal server to SBS

When this occurs:

1. TS can not ping SBS
2. SBS can ping TS
3. TS can ping gateway and and a linux server in the same VLAN connected via the 5505
4. Connection to TS can be made using rdp logging onto the server (not the SBS domain)

Have cleared arp tables on SBS and TS
Have rebooted everything

SBS + TS + Linux have static IPs
There are only three devices on VLAN (SBS TS Linux + ASA)
DHCP  from SBS (used for VPNs) is from SBS and is definatly not in conflict with TS or SBS

Help............
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Question by:Oggle
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5 Comments
 
LVL 45

Expert Comment

by:Craig Beck
ID: 35094519
Check the subnet mask on the SBS server IP address properties.
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Author Comment

by:Oggle
ID: 35095154
The subnet  mask is correct  - the system has worked fine  part of the time with intermittant failures but has now in the state described above.
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Accepted Solution

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Oggle earned 0 total points
ID: 35095761
Problem found:

Problem was Routing and  Remote Access had somhow used IP outside the allocated DHCP scope set in DHCP. (Dynamic Host ConfigurationPolicy set )

Maybe because the DHCP relay agent was not set - now set to use DHCH from SBS server (itself)
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Author Comment

by:Oggle
ID: 35096233
There is aparanly a need to include the old DHCP scope in the DHCP setting and then exclude the old scope. If the old scope is not included the DHCP clients will continue to use old leases (using the old leases and corresponding Ips)

By including to old scope and then setting the old scope as reserved prvents to old leases from being re-used.

The problem in my case was a VPN client had used an old lease with the same IP as now allocated to the TS.
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Author Closing Comment

by:Oggle
ID: 35135831
Fixed Problem
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