OSDOCS-14925: Documented the slb mode release note

Author: dfitzmau

release_notes/ocp-4-19-release-notes.adoc

@@ -654,6 +654,13 @@ For more information, see xref:../updating/preparing_for_updates/updating-cluste
 ==== Updates to Gateway API custom resource definitions (CRDs)
 {product-title} {product-version} updates {SMProductName} to version 3.0.2, and Gateway API to version 1.2.1. See the link:https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0/html/release_notes/ossm-release-notes[{SMProductShortName} 3.0.0 release notes] and the link:https://github.com/kubernetes-sigs/gateway-api/blob/main/CHANGELOG/1.2-CHANGELOG.md#v121[Gateway API 1.2.1 changelog] for more information.
 
+[id="ocp-4-19-networking-balance-slb-mode_{context}"]
+==== Enable OVS balance-slb mode for your cluster (General Availability)
+
+You can enable the Open vSwitch (OVS) `balance-slb` mode on infrastructure where your cluster runs so that two or more physical interfaces can share their network traffic.
+
+
+
 [id="ocp-4-19-networking-ptp-dual-oc_{context}"]
 ==== Dual-port NICs for improved redundancy in PTP ordinary clocks (Technology Preview)
 With this release, you can use a dual-port network interface controller (NIC) to improve redundancy for Precision Time Protocol (PTP) ordinary clocks.