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.
- Request to have NAKs enabled
- Log into Reception station
- Update configuration file called
cast-client_ter-1.ini:
vi /etc/cast-client_ter-1.ini
4. Update following parameters:
packet_naks=1
5. Become root to run the other steps
sudo su
6. Configure IP for NAKs (default setting uses tunnel interface which is blocked on the firewall):
iptables -t nat -A POSTROUTING --destination 193.17.9.3/28 -j SNAT --to-source <user-vm-ip>
iptables -t nat -L
7. Ensure the rule persists after reboot by saving the iptables rules:
sudo apt-get install iptables-persistent
iptables-save > /etc/iptables/rules.v4
8. Restart the tellicast-client
systemctl restart tellicast-client