User story : As a network administrator using nmstate on RHEL, I want to set the congestion window (cwnd) for static routes, so that I can have more control over TCP traffic flow and optimize network performance. Acceptance criteria : Given a system administrator configuring a static route using nmstate on RHEL,  When they specify the 'cwnd' (congestion window) value as part of the route configuration, Then the route should correctly apply this 'cwnd' value, and it should be verifiable through network tools or logs, demonstrating the effective control of the TCP congestion window for that route. Definition of Done : The implementation meets the acceptance criteria Unit test and integration test are written and pass The code is part of a build attached to an errata The initial text for this enhancement in the feature-reason-result format (More details here )

.`nmstate` now supports the congestion window clamp (`cwnd`) option With this update, you can use the `cwnd` option of the `nmstate` utility to set a maximum limit on the TCP congestion window size. This way you can control the maximum amount of unacknowledged data expressed as a number of packets that can be in transit over the network at any given time. The following example YAML file sets the `cwnd` option: ---- --- interfaces:   - name: eth1     type: ethernet     state: up     ipv4:       address:         - ip: 192.0.2.251           prefix-length: 24       dhcp: false       enabled: true routes:   config:     - destination: 198.51.100.0/24       metric: 150       next-hop-address: 192.0.2.1       next-hop-interface: eth1       table-id: 254       cwnd: 20 ----