I have two Cisco UCS C220 and two Cisco UCS C240 connected to a Cisco 4500-X. They are all running ESXi 6.5.0. I am looking at doing a big migration in another office with a dozen servers so I am doing my staging on the smaller deployment in my office. I have followed guides on vMware to configure ESXi and on Cisco to configure my switch. Here is how I set it up and what happens:
Created a new vSwitch that was attached to a dedicated 10G interface.
The Cisco switch was setup as an access port. Verified link was up on both Cisco and ESXi.
I did not tag the VMkernel with the VLAN number since it is an access port.
I am not able to ping from one vMotion interface to another using:
ping -I vmk1 -S vmotion [172.18.99.15](https://172.18.99.15)
Doing a SHOW MAC ADDRESS-TABLE on the Cisco switch shows no MAC on those physical ports.
Created an SVI on my switch and can’t ping the vMotion interfaces.
At this point I tagged the VMkernel with VLAN 203 just to test. The MAC addresses of all the servers show up on the Cisco switch, still no connectivity, and after 4 minutes or so the MAC addresses drop from the Cisco switch and will not return until I change the VMkernel to untagged and back to tagged.
I have tried both 1500 MTU and jumbo frames MTU 9000.
I have rebooted the services on the servers.
Any other suggestions for troubleshooting?
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