Vm's when migrated from one host to other , it can't be reached .

[msridharan]

Hi Team,

I have nutanix cluster/VM's which are connected to Cisco 1300-12X-2X switches which are stacked and i see only this LACP has Auto/ON options. these are L2 switches .

My uplink is Cat 3850 and has portchannels configured between L3 switch and L2 switches(1300). one end LACP is active and Auto in Cisco 1300s.

We have the VMs reaching out without any issues, but when we migrate it from one host to other host, it can't reach out(can't reach the gateway which is above L3 switch).

When new VM's are created in each hosts, VM's operate with no issues, only when i migrate i see this issue.

L3 switch -- Cat 3850

L2 ---- Cisco 1300 (2 switches are stacked)

Nutanix hosts.

Any suggestions / solution is highly helpful.

[Mark Elsen]

 - @msridharan  I would start by clearing the arp cache on the parent switches ,

 M.

[julian.bendix]

Are the newly created hosts working on any host? Or are the VMs on one host always unreachable?

A diagram would be nice.

[msridharan · Accepted solution]

Vm's when newly created on all hosts are able to reach gateway, only when we do VM migration to other host, it fails. But we were able to resolve it by reducing MAC learning time from default to 10s. Thanks for all the help.