Exchange services not starting

My exchange 2010 just stopped working. I have restarted couple of times and i didnt work. i cannot RDC to it either. no recent windows updates.

i have noticed that some exchange services are either "starting" or "stopping"

the below are errors from event viewer.

Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1400). Topology discovery failed, error 0x8007077f.

The Microsoft Exchange Replication service failed to start the Third Party Replication Manager. Please review the Event Log for more information. The system will attempt to start the service again in 30 seconds.

Process MAD.EXE (PID=3784). Topology discovery failed, error 0x8007077f.

any ideas ?

thanks

 events events
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aucklandnzAsked:
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prashant_sawantCommented:
HAve checked the IPV6 Setting in the network connection properties, If not check by selecting it.
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aucklandnzAuthor Commented:
i found the problem.

it was my fault.

on the domain controller > Active Directory Site and Services i have added new site, and new subnet and assigned the new subnet to new site. any ideas why it caused the problem ?

all my servers are on 192.168.0.0/24

i have added new subnet 192.168.1.0/24

Thanks
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prashant_sawantCommented:
Has the issue been resolved?
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aucklandnzAuthor Commented:
yes by removing new site and subnet that i have added
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aucklandnzAuthor Commented:
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