Cannot ping and/or lose connectivity to some 2008r2 servers

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hi,

we have bunch of 2008r2 servers on occasion cannot ping domian pcs (win7 professional).  dns on servers can't ping set expected , firewall off.

one thing notice on of pcs cannot ping problems servers - return address time out , hostname resolved ipv6.  

if reboot problematic servers can ping again (say 10 mins) , servers returning ipv6 address return ipv4 address , works.

some people turn off ipv6 on servers not ms according following article.

http://technet.microsoft.com/en-us/network/cc987595.aspx

anyone know why we’re losing connectivity servers so big issue!

thanks

do not disable or turn off ipv6, because newer application requires ipv6 accessibility. secondly, rebooting resolves issue make me believe can due memory leak or can due outdated hardware drivers of system. way find problem ad or client system, use vanilla system may vm or new hardware, join domain & see if works correctly, if problem system not ad.i ensure necessary os updates(sp/patches) & hardware updated (nic, firmware, bios) updated latest version.

sometimes, security software's antivirus can create such issues blocking communication utilizing excess memory , cpu. ad, can perform test using dcdiag & adreplstatus tool verify problem doesn't lie ad.

what dcdiag actually… do?  

active directory replication status tool released

clients pointing local dns server in nic, not other ip. same applicable dc itself. configure dc gc , dns too, if not already.

dns recommendations microsoft 

awinish vishwakarma - mvp

my blog: awinish.wordpress.com

disclaimer posting provided as-is no warranties/guarantees , confers no rights.



Windows Server  >  Directory Services



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