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The feedback channel required for retransmission is disabled by default during the trial phase. This results in reduced availability with logs reporting "Lost X messages during the last 60 seconds". Please enable NAKs and ACKs in coordination with EUMETSAT for optimal availability.

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In order to

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vi /etc/cast-client_ter-1.ini

4. Update following parameters:

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packet_naks=1

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5. Become root to run the other steps

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sudo su

 

6. Configure IP for NAKs (default setting uses tunnel interface which is blocked on the firewall):

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iptables -t nat -A POSTROUTING --destination 193.17.9.3/28 -j SNAT --to-source <user-vm-ip>
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iptables -t nat -L

7. Ensure the rule persists after reboot by saving the iptables rules:

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sudo apt-get install iptables-persistent
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iptables-save > /etc/iptables/rules.v4

8. Restart the tellicast-client

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enable NAKs you can run the workflow called SetupNAKsonEUMETCastTerrestrialClient from the EUMETcast machine provisioned.

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Thanks to Stephan Finkensieper from CMSAF for contributing with the ansible script to the EWC community and to EUMETCast Team for finalizing it.