topic Re: Firepower FMC and FTD causing ESXi server fail in Network Security

Firepower FMC and FTD causing ESXi server fail

KimG — Fri, 21 Feb 2020 15:28:34 GMT

Hi all,

I am running FMC and FTD on ESXi server and every time the FMC boot up and I try to login, I loose Vsphere client connectivity and SSH to ESXi server. I can ping FMC and FTD and ESXI host but no remote connectivity.

Any idea? has anyone seen before?

Re: Firepower FMC and FTD causing ESXi server fail

Marvin Rhoads — Tue, 06 Mar 2018 10:56:03 GMT

What version of ESXi are you using? 6.5 is not certified and has some known incompatibilities.

If you're on 5.5 or 6.0 it should work fine. Do you have your FTD VM's network interfaces set to promiscuous mode? (FMC doesn't require that.)

Re: Firepower FMC and FTD causing ESXi server fail

KimG — Wed, 07 Mar 2018 00:12:35 GMT

No, I am using ESXi version 6. Weird part is as soon as it's boot up on the active network, The ESXI remote connectivity is lost but but boot up on isolated network, it works fine.

Re: Firepower FMC and FTD causing ESXi server fail

Marvin Rhoads — Wed, 07 Mar 2018 07:44:18 GMT

Is there any possibility that you have a duplicate IP address?

I'd check your arp cache before and during the problem