Update links to avoid redirects. (#5771)

docs/concepts/cluster-administration/cluster-administration-overview.md

@@ -7,7 +7,7 @@ title: Cluster Administration Overview
 
 {% capture overview %}
 The cluster administration overview is for anyone creating or administering a Kubernetes cluster.
-It assumes some familiarity with concepts in the [User Guide](/docs/user-guide/).
+It assumes some familiarity with core Kubernetes [concepts](/docs/concepts/).
 {% endcapture %}
 
 {% capture body %}
@@ -18,7 +18,7 @@ See the guides in [Picking the Right Solution](/docs/setup/pick-right-solution/)
 Before choosing a guide, here are some considerations:
 
  - Do you just want to try out Kubernetes on your computer, or do you want to build a high-availability, multi-node cluster? Choose distros best suited for your needs.
- - **If you are designing for high-availability**, learn about configuring [clusters in multiple zones](/docs/admin/multi-cluster/).
+ - **If you are designing for high-availability**, learn about configuring [clusters in multiple zones](/docs/concepts/cluster-administration/federation/).
  - Will you be using **a hosted Kubernetes cluster**, such as [Google Container Engine (GKE)](https://cloud.google.com/container-engine/), or **hosting your own cluster**?
  - Will your cluster be **on-premises**, or **in the cloud (IaaS)**? Kubernetes does not directly support hybrid clusters. Instead, you can set up multiple clusters.
  - **If you are configuring Kubernetes on-premises**, consider which [networking model](/docs/concepts/cluster-administration/networking/) fits best. One option for custom networking is [*OpenVSwitch GRE/VxLAN networking*](/docs/admin/ovs-networking/), which uses OpenVSwitch to set up networking between pods across Kubernetes nodes.