Mac and windows clients losing connection to Server 2012 Namespace

I am running Windows 2012 Standard edition on two HP Servers. Both are fully patched O/S's and all HP system updates are installed. Each is running a 10 Gbit NIC to a Cisco 2960 Switch fully updated. Both Network shares are on HP external Drive bays connected
through a Smart Array P822 card
All users connect to the primary server (secondary server configured not to take referrals at this time)
My Mac clients running OS X 10.9.1 connect using smb and the namespace. When the designers come in they usually have to reboot in order to connect to their server shares. We discovered today that if they change the IP address the reboot is not needed. We
have an archive server running on a Synology NAS. Their connection to the Synology is not impacted.
The windows machines will lose connection at random and not everyone at once. Usually no more than twice in a week. The fix is either a reboot or an IP change, sometimes both. None of the machines go to sleep or hibernate. All machines are fully patched
with windows updates, and HP system updates.
We run Avast on both the Mac's and PC's if this makes a difference.
Any thoughts?
thanks

thanks Shaon,,
1) IP address before is within our DHCP scope of 192..168.0.51/200. When we set to static we set it to 192.168.0.16/20. We then reset back to DHCP.
2) The error message is that it can not find the server if I try to map it.
3) Clients can still access by IP address and FQDN
We have disabled Avast on a few machines to see if it will make a difference. We then ran into the issue on a machine without Avast installed.
We did notice that our DNS server was not deleting old entries and we found many duplicate entries. We set it to scavenge and then I went through and deleted old records. Not sure if this would cause a problem or not.
thanks again for your help!

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I made this change to the registry on the server and am waiting to see if I have any more drops.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
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Data
type : REG_DWORD
Value:
ffff (Hex)
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Background:
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Hi soccerdude21490-
+Is this possible?+
Theoretically yes. However, it would be up to the school to allow you access through their network.
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Luck-
-DP

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Although you cannot partition the TC. you can still copy files to it.. this does have implications for TM.. but as long as there is plenty of free space should not be a major issue.
You can create a disk image via the disk utility in a Mac.. and as stated you can create partitions if you do it on a Mac with the disk directly connected which means breaking warranty if any exists on the TC.

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Say "Thanks" by clicking the Kudos Star in the post that helped you.
Although I work for HP my posts and replies are my own
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+ Click the White Kudos star on the left as a way to say "thank you" for helpful posts.

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tt2

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Mac and windows clients losing connection to Server 2012 Namespace

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