diff --git a/chapter/layer3.tex b/chapter/layer3.tex
index 211be0f..ca5e571 100644
--- a/chapter/layer3.tex
+++ b/chapter/layer3.tex
@@ -53,6 +53,14 @@ Always remember the following points for Cisco devices:\cite{wiki:Administrative
 \newpage
 
 \section{EIGRP}
+\
+\gls{eigrp} is Cisco's enhanced edition if \gls{igrp}. Dating back to 1993 and a leg for Cisco over other vendors back in the early days of the Internet. (.. hmm. And remember Cisco's implementation of \gls{ospf} was known to be unstable until the early 2000's.)
+
+The change to \gls{eigrp} from \gls{igrp} was due to the support of classless routing. (\gls{igrp} only supported classful routing of class A (/8), B (/16), and C (/24) networks.)
+
+Cisco converted \gls{eigrp} to an open standard back in 2013 with \rfc{7868}.\cite{wiki:Enhanced_Interior_Gateway_Routing_Protocol}
+
+\gls{eigrp} adds support for \gls{vlsm} and the \gls{dual} with improved routing capabilities in comparison to \gls{igrp}. Overall \gls{eigrp} provides better capabilities compared to it's predecessor.
 
 \newpage