Include admonition about second network interface

installation.adoc

@@ -22,7 +22,7 @@
 
 = FS Linux 11 Installation Guide
 J.F.H. Quick, D.E. Horsley, and W.E. Himwich
-Version 1.1.0 - February 2024
+Version 1.1.1 - June 2024
 
 :sectnums:
 :experimental:
@@ -334,6 +334,14 @@ and press kbd:[Enter].
 the form `_xxx.xxx.xxx.xxx_` (where each `_xxx_` is any integer from 0 - 255
 inclusive) and press kbd:[Enter].
 
+IMPORTANT: Before connecting an Ethernet cable to an additional
+(non-`primary`) interface, you must use the
+<<Stabilize network configuration>> subsection of
+<<Additional Setup Items>> appendix. For example, in addition to the
+`primary` interface, you may connect a cable to the second interface
+for IPMI. In this situation, the second interface may be incorrectly
+utilized in Linux if it is not disabled.
+
 === Set a hostname
 Backspace over the default hostname _debian_ and type in the name
 you require (if not already retrieved via DNS), then press  kbd:[Enter].