We have a NX-3060-G4 with 3 VMware hosts on that is currently connected to our Cisco core switch cluster using 10GB twinax cables. A long story short, I need to remove these and connect the NTX to a single 1GB Cisco switch (WS-C3850-12S-S).
My question is: can I connect a 1GB SFP link between the NTX and new core switch using the 10GB NTX ethernet port? If so, will the NTX detect that the cable connected can only run at 1GB?
Thanks in advance.
Best answer by sbarab
@glay Thanks for your reply.
In that case, it appears to me that you are not using SPF. You just use the RJ45 connection and the connection with the SPF is just a backup connection which is not used presently
If you are using the 1G nic as active and 10G nic (SPF connected) as back up, you still have the same problem of whether the physical switch will work with 10G Nics connected via SPF when you need it (when the backup connection will need to become active)
As for why you cannot connect to the ESX hosts, my assumption is that you might have had a different vSwitch and/or port group for ESX console connectivity (the management network), and when you moved the interface from that vSwitch or port group to accommodate the Nutanix network communication, you lost the network connectivity to the console of the ESX nodes. You will need to make sure the port group you use for ESX console access has a NIC associated with it. My guess is at this point if you don't have console connectivity, you may have to use the IPMI to access the console of the ESXi host remotely and run manual network commands to do this.
Let me know if that is the case.