https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458344#M569404 <P>Hello <a href="https://community.cisco.com/t5/user/viewprofilepage/user-id/1241418">@smiling_jack</a>&nbsp;,</P><P>&nbsp;</P><P>Yes you can configure HA between hardware and virtual machine, the VM sizing is important make sure to configure it to match the appliance in term of (CPU, DISK, Memory, I/O), same ISE version/patch/licensing.</P><P>&nbsp;</P><P>According to&nbsp;BRKSEC-3432, the round trip between the nodes should be &lt;300ms.<BR /><BR />Hope that helps!</P> Wed, 01 Sep 2021 15:43:52 GMT Amine ZAKARIA 2021-09-01T15:43:52Z https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458190#M569402 <P>Can I use virtual appliance and hardware appliance for high availability？</P><P>&nbsp;</P> Wed, 01 Sep 2021 12:39:02 GMT https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458190#M569402 smiling_jack 2021-09-01T12:39:02Z https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458344#M569404 <P>Hello <a href="https://community.cisco.com/t5/user/viewprofilepage/user-id/1241418">@smiling_jack</a>&nbsp;,</P><P>&nbsp;</P><P>Yes you can configure HA between hardware and virtual machine, the VM sizing is important make sure to configure it to match the appliance in term of (CPU, DISK, Memory, I/O), same ISE version/patch/licensing.</P><P>&nbsp;</P><P>According to&nbsp;BRKSEC-3432, the round trip between the nodes should be &lt;300ms.<BR /><BR />Hope that helps!</P> Wed, 01 Sep 2021 15:43:52 GMT https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458344#M569404 Amine ZAKARIA 2021-09-01T15:43:52Z https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458555#M569410 <P>Thanks bro!</P> Thu, 02 Sep 2021 02:37:10 GMT https://community.cisco.com/t5/network-access-control/ise-high-availability/m-p/4458555#M569410 smiling_jack 2021-09-02T02:37:10Z