On 05/23/2014 03:37 PM, Stephen John Smoogen wrote:
>
>
>
> On 23 May 2014 16:12, ToddAndMargo <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
>
>     On 05/23/2014 02:25 PM, ToddAndMargo wrote:
>
>         This is why I ask (VLC's doing):
>
>         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
>
>         eth0.5 is a virtual Ethernet too, not hooked to the Internet.
>
>         And port 3535 UDP?
>
>         $ grep -i 3535 /etc/services
>         ms-la           3535/tcp                # MS-LA
>         ms-la           3535/udp                # MS-LA
>
>
>     I wonder why VLC goes out looking on eth0.5?
>     And why port 3535 UDP?
>
>     $ ip route show
>     192.168.250.0/24 <http://192.168.250.0/24> dev eth1  proto kernel
>       scope link  src 192.168.250.133
>     192.168.122.0/24 <http://192.168.122.0/24> dev virbr0  proto kernel
>       scope link  src 192.168.122.1
>     192.168.254.0/24 <http://192.168.254.0/24> dev eth0.5  proto kernel
>       scope link  src 192.168.254.10
>     192.168.255.0/24 <http://192.168.255.0/24> dev br0  proto kernel
>       scope link  src 192.168.255.10
>     169.254.0.0/16 <http://169.254.0.0/16> dev eth1  scope link  metric 1003
>     169.254.0.0/16 <http://169.254.0.0/16> dev br0  scope link  metric 1004
>     169.254.0.0/16 <http://169.254.0.0/16> dev eth0.5  scope link
>       metric 1005
>     default via 192.168.250.1 dev eth1
>
>
> I would expect it is so that you could stream the video etc to multiple
> desktops at the same time. So if your network supported multicast and
> you had say a bunch of different stations they could all get the same
> stream without the linear growth of traffic.
>
> Multicast was all the thing in the mid 1990's with universities and such
> looking at if for their remote learning and entertainment looking to use
> it for movies and such. The problem is that multicast has all kinds of
> corner cases which sidelined it because it tended to take out top level
> routers. Today I believe it is used for small dedicated networks.
>
> --
> Stephen J Smoogen.
>

Hi Stephen,

    That explains it.  Thank you!

-T

-- 
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