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Rene_125890's avatar
Rene_125890
Icon for Nimbostratus rankNimbostratus
Aug 26, 2013

Closed Caption implementation

I'm trying to implement a NAT that points to a Closed Caption Service. I'm using a Virtual Server with Standard Profile, TCP Protocol and a SNAT. Service port = 0.

 

Actually, the NAT doesn't cross the Big-IP LTM so it works fine. the closed caption service uses its default route to reach the firewall with the configured NAT. The NAT is configured in the object with the LAN IP of the closed caption device. I mean, it is a different path of the Big IP LTM system.

 

When I test my configuration it appears to works fine, but it only works once. Unexpectly it stops to work and if We try to send more text to the closed caption device it can't be viewed into the video signal although it seems that the source is sending the data.

 

Is there anybody who has implemented a closed caption service?

 

Thanks for your help.

 

design

3 Replies

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  • Kiozs_131042's avatar
    Kiozs_131042
    Icon for Altocumulus rankAltocumulus
    Aug 26, 2013

    Hi Buddy,

     

    can you provide tcpdump using following command when you sending the text to Virtual server:

     

    tcpdump -i :nnn -s0 -w /var/tmp/testdump.dmp

     

    and attached your tcpdump to this post.

     

    It will be great, if you can provide a simple network diagram.

     

    Please disable NAT configuration on LTM if there's any for the Closed Caption Service.

     

    • boneyard's avatar
      boneyard
      Icon for MVP rankMVP
      Aug 27, 2013
      i don't think you can add files here so you probably end up posting some of the tcpdump lines here.
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Aug 27, 2013

    tcpdump -i :nnn -s0 -w /var/tmp/testdump.dmp

    i guess interface 0.0 is truncated by formatting. i understand what Kiozs replied is something like this:

     tcpdump -i 0.0:nnn -s0 -w /var/tmp/testdump.dmp