The following topics explain how to add or remove static routes:
- https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html/administration_guide/chap-logical_networks#proc-Adding-a-static-route-on-a-host
- https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html/administration_guide/chap-logical_networks#proc-Removing-a-static-route-on-a-host

The following nmstate topic mentions static routes:
- https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html-single/administration_guide/index#con-Network-Manager-Stateful-Configuration-nmstate

Hi Rolfe

In the Add section at https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html-single/administration_guide/index#proc-Adding-a-static-route-on-a-host
9.1.6. Adding a static route on a host

At the example below "metric: 100" can be removed, it not must:
routes:
  config:
  - destination: 192.168.123.0/24
    metric: 100                        <- should be removed from the example because it not required, if not entered it will get a default value from the system.
    next-hop-address: 192.168.178.1
    next-hop-interface: eth1



In the delete section:
https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html-single/administration_guide/index#proc-Removing-a-static-route-on-a-host

At the example below: "[eth1]" should be changed to: "[{“name”: eth1}]"
routes:
  config:
  - destination: 192.168.123.0/24
    metric: 100
    next-hop-address: 192.168.178.
    next-hop-interface: eth1
    state: absent
interfaces: [eth1]      <- should be changed to:  [{“name”: eth1}]


Thx
Roni

Also this from https://bugzilla.redhat.com/show_bug.cgi?id=1771977#c5

"It is recommended to document that the custom static-route will be kept whenever 
the related route interface/bond exists and has an IP address. And will be removed if not.
As a result, there is different behavior between VM-Network and Non-VM-Network. 
A VM-Network is based on a bridge, while Non-VM-Network on an interface.
So replacing interface/bond (by moving the Network to other interfaces/bond) 
will not affect the route that related to VM-Network but will delete a route that related to a Non-VM-Network"

Thanks Roni. I've made the changes you suggested. 

Please review the changes here: https://gitlab.cee.redhat.com/rhci-documentation/docs-Red_Hat_Enterprise_Virtualization/-/merge_requests/1720

If it looks good, just comment "LGTM" below.

LGTM
Thanks for fixing it

Merged and published.