OCPBUGS-17933: Clarify steps

- https://issues.redhat.com/browse/OCPBUGS-17933

Author: jab-rh

modules/nw-cluster-mtu-change.adoc

@@ -75,6 +75,11 @@ Status:
 
 ifndef::local-zone,wavelength-zone,post-aws-zones,outposts[]
 . Prepare your configuration for the hardware MTU:
++
+[IMPORTANT]
+====
+There are many ways to configure the hardware MTU for your cluster nodes. The following examples show only the most common methods. You must verify that your infrastructure MTU is correct and that your preferred method for configuring your hardware MTU in the cluster nodes is in effect before proceeding.
+====
 
 ** If your hardware MTU is specified with DHCP, update your DHCP configuration such as with the following dnsmasq configuration:
 +
@@ -401,7 +406,7 @@ $ oc get nodes
 +
 [source,terminal]
 ----
-$ oc debug node/<node> -- chroot /host ip address show <interface>
+$ oc adm node-logs <node> -u ovs-configuration | grep configure-ovs.sh | grep mtu | grep <interface> | head -1
 ----
 +
 where: