what is VLC doing with Port 3535 UDP?

[ToddAndMargo]

Hi All,

Scientific Linux 6.5, 64 bit
Xfce 4.8
vlc-2.1.3-12.el6.x86_64

Whenever I start my playlist, VLC tries to get out to 224.0.0.251 on Port 3535 UDP. Why?

kernel: Vlan-out Everything Else IN= OUT=eth0.5 SRC=192.168.254.10 DST=224.0.0.251 LEN=56 TOS=0x00 PREC=0x00 TTL=255 ID=0 DF PROTO=UDP SPT=5353 DPT=5353 LEN=36

Many thanks,
-T

My playlist:

<?xml version="1.0" encoding="UTF-8"?>
<playlist xmlns="http://xspf.org/ns/0/" xmlns:vlc="http://www.videolan.org/vlc/playlist/ns/0/" version="1">
<title>Playlist</title>
<trackList>
<track>
<location>http://listen.radionomy.com/abacusfmopera</location>
<title>Abacus.fmOpera</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>0</vlc:id>
</extension>
</track>
<track>
<location>http://media-ice.musicradio.com/ClassicFMMP3</location>
<title>Classic FM</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>1</vlc:id>
</extension>
</track>
<track>
<location>http://hi1.streamingsoundtracks.com:8000</location>
<title>StreamingSoundtracks.com - Scores of Music from Movies, Game, TV & Anime w/Chat & Automated Requests</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>2</vlc:id>
</extension>
</track>
<track>
<location>http://listen.cinemix.fr</location>
<title>CINEMIX</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>3</vlc:id>
</extension>
</track>
<track>
<location>http://ancientfaith1.streamguys.com:80/live</location>
<title>Ancient Faith Music</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>4</vlc:id>
</extension>
</track>
<track>
<location>http://ancientfaith2.streamguys.com:80/live</location>
<title>Ancient Faith Talk</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>5</vlc:id>
</extension>
</track>
<track>
<location>http://streaming.radionomy.com/AbacusfmChopin</location>
<title>Abacus.fmChopin</title>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:id>6</vlc:id>
</extension>
</track>
</trackList>
<extension application="http://www.videolan.org/vlc/playlist/0">
<vlc:item tid="0"/>
<vlc:item tid="1"/>
<vlc:item tid="2"/>
<vlc:item tid="3"/>
<vlc:item tid="4"/>
<vlc:item tid="5"/>
<vlc:item tid="6"/>
</extension>
</playlist>