Not able to ping the servers - request time out


We use VMware, I am not able to ping some of the servers which includes the DC as well.
I am pinging them from my laptop that is connected to the core switch. Please let me know how to trouble shoot this. Also I went to the Vsphere console and right clicked the DC1 and open console and logged in to the DC1 and when I ping other servers from the DC 1, it is not pinging, I get request time out, and some times it pings.
We have a cores switch and LACP done on it, will this be a problem with core switch.
Not sure where the problem could be.
Please let me know how to trouble shoot this

Any help to troubleshoot would be great
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Norm DickinsonGuruCommented:
You may be on a different VLAN or segment of the network when trying to ping? That would be controlled at the router or firewall typically, but also could be a smart switch.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
LACP is this configured for the ESXi hosts ?

are you using standard or distributed switches, because LACP is NOT SUPPORTED for ESXi hosts, only static trunks.

Note: LACP is only supported in vSphere 5.1, 5.5 and 6.0 with vSphere Distributed Switches and on the Cisco Nexus 1000V.

Source - see here

Sample configuration of EtherChannel / Link Aggregation Control Protocol (LACP) with ESXi/ESX and Cisco/HP switches (1004048)

Also make sure ALL VMs are using VMXNET3 interface, and VMware Tools is installed to support this interface.
lianne143Author Commented:
previous before the problem has happened, I  have successfully pinged the servers from the same LAN cable connected to the core switch.
IT Degree with Certifications Included

Aspire to become a network administrator, network security analyst, or computer and information systems manager? Make the most of your experience as an IT professional by earning your B.S. in Network Operations and Security.

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
did you read my post ?
lianne143Author Commented:
We have 2 brocade switches for SAN  and  LACP is configured on cisco switches, but not sure if LACP is configured for ESX .
It was a working setup, all of sudden the network went down, will it be an issue with the brocade switches ?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
LACP not supported for ESXi.
lianne143Author Commented:
Is there a way to find, if LACP is configured for ESXi
In case if it was configured at first instance, it must have not worked , it has been running from last 3 years.
Just my thought.
This is a new type of problem which has happened today, which I have come across for the first time.
Norm DickinsonGuruCommented:
Don't overlook the various cabling issues that could be present. Check connections and maybe give the relevant connections a little push to ensure they are fully seated. Sometimes the biggest problems stem from simple issues like connectors not being snug.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Check your physical port groups on the physical switches, are they configured for LACP.

Do you use trunk ports to connect physical switches to ESXi ?

There is nothing to check on ESXi.
So this was working then broke. Let's take a look back at the event before the problem started.

1) Any changes to the network switch / vCenter vDS?
2) Can you please upload a screen shot of the setting on one of your vDS in regards to its teaming policy
3) Are your vDS ports group tagging traffic or is the physical switch?

Experts Exchange Solution brought to you by ConnectWise

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.