Impact of changing Virtual Router for FTD Interfaces

[sahdogra]

I am using FTD 3110 managed by FMC 7.6. I have interfaces in production for Guest Access and I want to assign them to a separate Virtual Router to segregate the traffic for guest on routing level. What is the impact of that in the production? Will there be a downtime?

[Marius Gunnerud]

If you have set everything up correctly there should be little to no downtime.  You might see a blip in traffic but should not be more than that.

[sahdogra]

Hi Marius, Thanks for the quick response. Would you please elaborate what everything you are referring here? I have 2 internet interfaces where I am doing load sharing using ECMP. Please suggest what all things should I check first. If there is any traffic disruption? 

[Marius Gunnerud · Accepted solution]

Unless you have a dedicated outside interface and gateway for the guest network you will be doing route leaking to the "outside" interface.

Have a read through this configuration document, it should give you a view of what needs to be in place.
https://www.cisco.com/c/en/us/td/docs/security/secure-firewall/management-center/device-config/760/management-center-device-config-76/routing-vrf.html#Cisco_Generic_Topic.dita_bb771ecd-75c0-4ed6-b2fb-98639864d675