About Me

My photo
This is a blog for John Weber. One of my joys in life is helping others get ahead in life. Content here will be focused on that from this date forward. John was a Skype for Business MVP (2015-2018) - before that, a Lync Server MVP (2010-2014). I used to write a variety of articles (https://tsoorad.blogspot.com) on technical issues with a smattering of other interests. I have a variety of certifications dating back to Novell CNE and working up through the Microsoft MCP stack to MCITP multiple times. FWIW, I am on my third career - ex-USMC, retired US Army. I have a fancy MBA. The opinions expressed on this blog are mine and mine alone.

2014/09/23

Duplicate IP error

Just ran into a little something I have not seen in a long time. Building edge servers with Windows Server 2012R2 and the external NIC kept coming up as duplicate address. Doing all the cross checking showed that the server had only two interfaces and that they were configured properly. Turns out that this little gem from 2008 R2 days is still valid:

http://social.technet.microsoft.com/forums/windowsserver/en-US/d7bda315-6366-4e0a-bdcf-dc875ff6963e/win-2008-r2-servers-will-not-connect-to-network-says-duplicate-ip

The firewall doing the NAT to the public IP was ASA. The registry change for disabling gratuitous ARP fixed all of the my edges.

This might be of interest also:  http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1028373

YMMV

at
Labels: , ,

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

test 02 Feb

this is a test it’s only a test this should be a picture

  • International Call Test Number
    Do you need to test outbound calling to international numbers but your customer doesn’t have anyone just sitting there waiting for your call...
  • Frontier FIOS and static IP
    Background About four months ago, I made the decision to extend my lab, Tsoorad.net, out to the larger world of the internet.  I have sever...
  • 1008;reason=Unable to resolve DNS SRV record
    ms-diagnostics: 1008;reason="Unable to resolve DNS SRV record";domain="domain.com";dns-srv-result="NegativeResult...