Solved

vmware guest to vmware guest can not communicate

Posted on 2009-07-02
8
1,430 Views
Last Modified: 2012-05-07
Hi everyone - maybe someone has seen this?

Our VMware guests from different VM servers cannot communicate. The guests can communicate with everything else (physical servers in and out of the same VLAN, internet, etc).The guests are in the same VLAN show the correct ARP entries.

The guests can communicate with other guests on the same vSwitch on the same VMserver - but not with different VMserver's.
The guests can communicate with other guests on different VMServers on different VLANs.

This happens with Windows and Linux guests. The Windows guests do not have the Windows firewall on. The guests are running on ESX 3i on HP Servers and the core network switch is an HP 5400. The core switch (which is responsible for VLAN routing) can communicate with every guest.

If anyone could suggest something to try I would give it a try.

Thanks

0
Comment
Question by:dustnik
  • 5
  • 3
8 Comments
 
LVL 22

Expert Comment

by:65td
ID: 24768625
Ping works OK both IP and host name?
Review TCP/IP configuration.
0
 

Author Comment

by:dustnik
ID: 24768658
no - ping does not work when the guests are on differnt VMservers. the guests are using the host names correctly. i have tried setting from static to dhcp but it dod not help
0
 
LVL 22

Expert Comment

by:65td
ID: 24768689
The guests can ping locally?
Can the guests ping gateways on each of the host VM networks?

Are the vlans trunked or is it single vlans (subnets) / network card?
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 

Author Comment

by:dustnik
ID: 24768724
yes - the guests can ping locally
yes - the guests can ping the default gateway

the vlans are trunked / multiple cards - I did change servers to use one NIC (removed trunking) but it did not help
0
 
LVL 22

Assisted Solution

by:65td
65td earned 500 total points
ID: 24769143
Are the trunks setup as described in this doc?

http://www.vmware.com/pdf/esx3_vlan_wp.pdf

0
 

Author Comment

by:dustnik
ID: 24773541
thanks 65td - I double checked the network using the vmware doc but it did not work

But I did find that 1 guest can communicate. The one that can communicate has its IP address in the range of the "Observed IP ranges" (from the vSwitch - network adapters tab). None of the other guests has IP numbers in the Observed IP ranges.

I do not know if this would make a difference or how to change it (or if it means anything important)?

0
 

Accepted Solution

by:
dustnik earned 0 total points
ID: 24773842
thanks 65td

the problem has been fixed. the VM Machine Port Group 'Load Balancing' was set to 'MAC Hash' - after changing it to 'IP Hash' the problem went away (I do not know why - it was MAC Hash for months).
0
 

Author Comment

by:dustnik
ID: 24773849
.
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

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.
Will try to explain how to use the VMware feature TAGs in the VMs and create Veeam Backup Jobs using TAGs. Since this article is too long, I will create second article for the Veeam tasks.
Teach the user how to install vSphere Update Manager  Console to Windows system:  Install vSphere Update Manager: Configure vSphere Update Manager plug-in in vSphere Client: Verify vSphere Update Manager settings in vSphere Client:
Teach the user how to install log collectors and how to configure ESXi 5.5 for remote logging Open console session and mount vCenter Server installer: Install vSphere Core Dump Collector: Install vSphere Syslog Collector: Open vSphere Client: Config…

775 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