Section about area structure, other chapter headings.

en/chap02.tex

@@ -229,3 +229,32 @@ system.
 
 \XXX{netsplit, multi links w/ same and diff costs, v2 vs v3, mixed segments,
 multiple prefixes. napsat na kolejích s gennetem..}
+
+\section{Area structure}
+
+It is also worth to consider the expected size and structure of an OSPF areas
+where Birdvisu might run. While it is up to the administrator and they may be
+very creative, there are some limits to such creativity.
+
+The largest system which can be spanned by a single OSPF instance is the whole
+autonomous system (AS). The largest ASes only have about several hundred
+thousand routers\cite{as-topologies}. The average degree also seems to be rather
+low.
+
+We can derive another limit from IPv4 address allocations. A /8 block (i.e.
+Class A) has 16 777 216 addresses. Very few ISP would be assigned such a large
+block, but they might be using the 10.0.0.0/8 private block. Even if an ISP
+wants to use all those addresses, majority of them will likely not be assigned
+to routers, but to some end devices that actually provide \uv{useful} services.
+Those devices are also likely to be grouped into non-trivial networks, thus
+reducing the number of vertices (i.e. routers and networks) in the OSPF
+topology. (While IPv6 allocates many more addresses, we assume that the overall
+topology will not be different from the IPv4 one.)
+
+It is probably not practical to have a single OSPF area span all the routers in
+a large AS, since any link state change results in an LSA being flooded
+throughout the area.
+
+While we cannot be sure about particular administrative decisions, given the
+observations above, we expect that a single area contains at most few thousand
+vertices and probably much less than that.

en/chap03.tex

@@ -0,0 +1 @@
+\chapter{Design}\label{ch:design}

en/chap04.tex

@@ -0,0 +1 @@
+\chapter{Usage}\label{ch:usage}

en/chap05.tex

@@ -0,0 +1 @@
+\chapter{Evaluation}\label{ch:evaluation}

en/thesis.tex

@@ -12,6 +12,9 @@
 \include{intro}
 \include{chap01}
 \include{chap02}
+\include{chap03}
+\include{chap04}
+\include{chap05}
 
 \include{epilog}