diff --git a/acronyms.tex b/acronyms.tex
index e7dd7ae..b263be2 100644
--- a/acronyms.tex
+++ b/acronyms.tex
@@ -35,6 +35,7 @@
 \newacronym{gps}{GPS}{Global Positioning System}
 \newacronym{gprs}{GPRS}{General Packet Radio Service}
 \newacronym{gsm}{GSM}{Global System for Mobile communications}
+\newacronym{ha}{HA}{High Availability}
 \newacronym{hsrp}{HSRP}{Hot-Standby Routing Protocol}
 \newacronym{ieee}{IEEE}{Institute of Electrical and Electronics Engineers}
 \newacronym{igrp}{IGRP}{Interior Gateway Routing Protocol}
@@ -59,6 +60,7 @@
 \newacronym{mpls}{MPLS}{Multiprotocol Label Switching}
 \newacronym{mst}{MST}{Multiple Spanning Tree}
 \newacronym{nms}{NMS}{Network Management Software}
+\newacronym{nsf}{NSF}{Nonstop Forwarding}
 \newacronym{ntp}{NTP}{Network Time Protocol}
 \newacronym{osi}{OSI}{Open Systems Interconnection}
 \newacronym{ospf}{OSPF}{Open Shortest Path First}
@@ -72,6 +74,8 @@
 \newacronym{pvst+}{PVST+}{Per Vlan Spanning Tree Plus}
 \newacronym{rfc}{RFC}{Request For Comments}
 \newacronym{rip}{RIP}{Routing Information Protocol}
+\newacronym{rpr}{RPR}{Route Processor Redundancy}
+\newacronym{rpr+}{RPR+}{Route Processor Redundancy Plus}
 \newacronym{rspan}{RSPAN}{Remote Switch Port Analyzer}
 \newacronym{rstp}{RSTP}{Rapid Spanning Tree Protocol}
 \newacronym{rpvst}{RPVST}{Rapid Per Vlan Spanning Tree}
@@ -87,6 +91,7 @@
 \newacronym{span}{SPAN}{Switch Port Analyzer}
 \newacronym{src}{src}{source}
 \newacronym{ssh}{SSH}{Secure Shell}
+\newacronym{sso}{SSO}{Stateful Switchover}
 \newacronym{stp}{STP}{Spanning Tree Protocol}
 \newacronym{tcn}{TCN}{Topology Change Notification}
 \newacronym{tcp}{TCP}{Transmission Control Protocol}
@@ -99,6 +104,7 @@
 \newacronym{vlan}{VLAN}{Virtual Local Area Network}
 \newacronym{vpn}{VPN}{Virtual Private Network}
 \newacronym{vrrp}{VRRP}{Virtual Router Redundancy Protocol}
+\newacronym{vss}{VSS}{Virtual Switch Stacking}
 \newacronym{vtp}{VTP}{Virtual Trunking Protocol}
 \newacronym{vxlan}{VXLAN}{Virtual eXtensible Local Area Network}
 \newacronym{wdm}{WDM}{}