Solved

NIC dropping pings, not a hardware problem

Posted on 2008-11-01
5
1,010 Views
Last Modified: 2013-11-09
Hi,

I have 2 server on the same network of the same name. I never have them running together so there is never a problem. I made the mistake of brining them both up at the same time yesterday and now when I shut one down the other (which is the one I need running) is dropping pings intermittently.

Both servers are running on ESX VMware on different hardware. I assume it's an ARP table somewhere that's causing the problem but not sure where?

Any ideas?
0
Comment
Question by:wannabecraig
  • 3
5 Comments
 
LVL 42

Accepted Solution

by:
paulsolov earned 250 total points
ID: 22858662
If they're both on a windows domain than you may have a bigger issue. If not then you have a few places where you need to clear the cache: ESX Servers, switch, router, etc..
0
 
LVL 5

Assisted Solution

by:giovannicoa
giovannicoa earned 250 total points
ID: 22859293
Hi,

to speed up resolving this issue try to remove the actual virtual nic and add a new one.
This is the same as removing and reinstalling a nic from a physical machine.
Obviously assign the same network address and configuration.

Hope this can help you,
Giovanni Coa
0
 
LVL 1

Author Comment

by:wannabecraig
ID: 22861821
I know I can remove and add a NIC, but I don;t want to. That's a work around, I'm looking to resolve the issue and want to know what to do when it happens again.

The are on a Windows site, but not part of the Domain. I'm pinging the ip Address so not a DNS issue either. Nearly sure it's the ESX ARP table that needs to be cleared but not sure where that is,
0
 
LVL 5

Expert Comment

by:giovannicoa
ID: 22943189
You can check ARP table on your switches and see if the MAC ADDRESS is present on more than LAN port. In that case you probably have two identical MAC addresses on two Virtual Machines.
Sometimes cloning, importing Virtual Machines can be the cause.

Hope this can help you,
Giovanni Coa
0
 
LVL 5

Expert Comment

by:giovannicoa
ID: 22974091
Any news about that ?

Giovanni Coa
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

It Is not possible to enable LLDP in vSwitch(at least is not supported by VMware), so in this article we will enable this, and also go trough how to enabled CDP and how to get this information in vSwitches and also in vDS.
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
Teach the user how to install ESXi 5.5 and configure the management network System Requirements: ESXi Installation:  Management Network Configuration: Management Network Testing:
Teach the user how to use vSphere Update Manager to update the VMware Tools and virtual machine hardware version Open vSphere Client: Review manual processes for updating VMware Tools and virtual hardware versions: Create a new baseline group in vSpā€¦

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

26 Experts available now in Live!

Get 1:1 Help Now