Solved

Virtual machines unable to access network

Posted on 2014-12-22
2
150 Views
Last Modified: 2014-12-22
I have a challenge.

The host is a ESXi 5.5 machine which has several VMs running on it.  The host has 4 vswitches, the first being the default VM Network, the second has a single NIC and connects to the DMZ port of the firewall.  The remaining two have only VMkernels for iscsi connections.  All VMs have static IPs  on a 10.0.15.0/24 network.  All point to the same gateway at 10.0.15.2.  All have the same DNS servers. All are connected to the same VM Network.  All these go through a layer 3 switch with a few VLans that have IPs assigned to them to get the public IPs on the ports, but for the most part, most of it is just a simple switch. All VM Network plugs are verified in the correct ports for the "inside" network, and out of the VLANs that have the public IPs. IPV6 is turned off while trying to figure this out.

The fun part is that only half of the VMs are able to access or ping the internet, or ping the gateway, but CAN ping and access other servers in the same subnet as long as those servers are virtual. The machines that are affected cannot ping any other physical device. DNS does work even on these VMs.  

All windows firewalls are off.  
All antivirus is disabled.
VM tools are up to date.

Everything I can find in the settings and VMware make a side to side match between VMs that work and those that don't.  The IP is not blocked anywhere, and this was verified by putting a physical machine on the suspect IP (VM nic disabled) and validating network and internet access.

Ideas?  I'm confused.
0
Comment
Question by:billherde
  • 2
2 Comments
 
LVL 3

Accepted Solution

by:
billherde earned 0 total points
ID: 40513710
Found answer
Shut down VM, remove network adapter.  Then start and shut down VM from vcenter or vsphere client.  add network adaptor back.  Boot and set IP addresses.
0
 
LVL 3

Author Comment

by:billherde
ID: 40514275
Addendum
Problem returned!
Found that one of three NICs in vnetwork on the server had a bad plug.  Removed NIC from VSwitch and it has stayed fixed.
0

Featured Post

Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
Identifying location based on IP address 13 87
VLAN question 7 45
Eigrp Router 5 48
Cisco Sup720 Migrate to Sup2T 5 40
I see many questions here on Experts Exchange regarding switch port configurations and trunks. This article is meant for beginners in the subject to help to get basic knowledge about Virtual Local Area Network (VLAN (http://en.wikipedia.org/wiki/Vir…
This tutorial will go through the steps required to write a script that will back up the configuration settings of a HP-ProCurve switch. You will need to get the following things to follow this tutorial: Telnet Scripting Tool e.g. TST10.exe …
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

760 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

20 Experts available now in Live!

Get 1:1 Help Now