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Vmware Network Issues

Hi

I have a strange problem.

2 ESXi hosts

I can ping ESX1's IP address. I can also ping and access all the VM's IP's as usual

I CANNOT ping ESX2's IP address. I CAN ping the VM's IP's. From the ESX Console I cannot ping anything.

I CAN manage ESX2 from vCenter.
I CANNOT manage the ESX2 host directly with vClient (timed out)

???
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hongedit
Asked:
hongedit
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1 Solution
 
hongeditAuthor Commented:
Scratch that, It seems I cant get to it from vCenter either.

??
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
it seems like the Service Console portgroup or Management Port group is not available.

could you upload pictures of your virtual switches in networking of ESX2
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Have you made any recent changes to networking on ESX2?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
okay, you'll not be able to screenshot networking, if you cannot access.

do you have access to the console of the server?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
you could follow muy solution here

http://www.experts-exchange.com/Software/VMWare/Q_26715493.html

if you want step by step assistance, please just let me know, and we will walk through it step by step
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hongeditAuthor Commented:
I have access to the console yes, but how do I do anything with it?

I thought ESXi didnt have a console for commands?

Anyways, no, no recent changes. I redid some cabling but I am 100% it is correct. Plus ESX1 is exactly the same way, that just has different IP.

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
there is a console

is this esx or esxi?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
login to console there is an option to test networking using ping?
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hongeditAuthor Commented:
This is ESXi 4.1. I have enabled the console.

What do I need to do now?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
theres is an option under network management to test networking

is this a production network with live vms?
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hongeditAuthor Commented:
Yes this is production, but I can reboot if necessary as it is out of hours.

Test networking fails for everything (Default Gateway, DC, DNS)
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
can you check ip address, and also check network interfaces, there should be mac addresses and an x next to the nics in use, and also should state connected?
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hongeditAuthor Commented:
IP details - fine
NICS - fine as described
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
do they show connected?
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hongeditAuthor Commented:
Yes
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hongeditAuthor Commented:
It just came up....

I didnt do anything.

This happened earlier today (dropped off) but then came back.

What is going on!!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
okay login into the console

and type esxcfg-vswitch -l
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hongeditAuthor Commented:
In vCenter it now has a alarm of

Network Uplink Redundancy Lost
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
there must be a networking fault.

whilst it's up, login with vcenter, and snapshot networking config

check the networking, by using the test
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hongeditAuthor Commented:
Theres lots of info, do you need me to type it all out?
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hongeditAuthor Commented:
I can access the ESXi host in vcentre now
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hongeditAuthor Commented:
Can you please explain in more detail

How do I snapshot the networking?

What networking test do I need to do?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
screenshot the networking switches
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hongeditAuthor Commented:
network snapshot
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, thanks for the screenshot.

1. First thing, did you notice that vmnic0, vmnic1 and vmnic5 are all currently set to 100MBps ?

Is this correct, should these be 1000 (as vmnic2, vmnic3 and vmnic4)

2. Management Netwok Port has a VLAN Tag? Is this correct?

3. All virtual machines that were available also go through the same LAN as 192.168.23.4 which were available.
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hongeditAuthor Commented:
Hi

Yes, the data network is still on a 10/100 switch. This is more or less out of our control as it belongs to the landlord.

The iSCSI network is in a GB switch hence 1000.

One of the things I tried was setting the "all" vlan of 4095 as they are techincally on a vlan here.

3. Yes, which is what is so strange!

Where do I go from here??
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
your virtual machines would be better on the 1000 ports.

but if youve tagged one port group you neef to tag the others virtual machine ones.

are virtual machines and esx server on same subnet?

are the three nics trunked running vlans? to virtual machine

i dont think there is need for management network to be vlan tagged at 4095
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hongeditAuthor Commented:
All the ports are 1000, but the data switch for the VM's is 100, hence connecting at 100.

I dont think the vlan tag is necessary either. In fact I just took it off.

VM's and ESX are on the same subnet.

Network is as follows:

10/100 Data Switch (belongs to landlord, has fiber uplink to WAN)
                   vvv                                                 vvv
      ESX1 vswitch0 (192.168.23.3)       ESX2 vswitch0 (192.168.23.4)
      ESX1 vswitch1 (1.1.1.2)                 ESX2 vswitch1 (1.1.1.3)
                   vvv                                                 vvv
                                 1000Mbps L2 Switch
                                           vvvvv
                                     iSCSI SAN (1.1.1.1)

             
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I think you would be better using the faster network for your VMs.

Just keep an eye on the 100MB network, and check Network Utilization figures in vCenter. If it becomes a bottleneck.
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hongeditAuthor Commented:
I dont see how I can, without replacing the main data switch with a GBe version.

The VM's MUST be on the 192.168.23.0 network. That is a physical 100mbps switch.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
you create a new PortGroup on the vSwitch1, and switch the virtual machine over to that, or is that only connected to your storage network?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
or leave as is, and monitor network performance for bottlenecks.
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hongeditAuthor Commented:
vSwitch1 is only for Storage :)

I'm not sure which to select for points!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, I understand. Make sure you monitor network on vSwitch, with the 100MB nics.
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hongeditAuthor Commented:
Thank you, again
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, I uunderstand, I've just looked at your network diagram. I understand your network toplogy.
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