..........................................................................................................................................................709
...............................................................................................................................................................709
......................................................................................................................................................................711
..............................................................................................................................................714
............................................................................................................................................................715
...................................................................................................................................................................716
............................................................................................................................................................716
...........................................................................................................................................................717
...................................................................................................................................................718
.........................................................................................................................................................719
..........................................................................................................................................................719
..................................................................................................................................................719
.............................................................................................................................................................720
..............................................................................................................................................721
21 High Availability (HA)............................................................................................................725
...............................................................................................................................................726
..............................................................................................................................................729
............................................................................................................................................729
...........................................................................................................................................................732
.................................................................................................................................................734
22 ICMP Message Types..........................................................................................................737
..................................................................................................................................................739
.................................................................................................................................................740
....................................................................................................................725
.............................................................................................................................726
..........................................................................................................................727
....................................................................................................................................728
....................................................................................................................................730
......................................................................................................................................731
......................................................................................................................................732
.................................................................................................................................733
.......................................................................................................................................739
.....................................................................................................................................741
..................................................................................................................................741
................................................................................................................................742
...............................................................................................................743