We have in very few installations experienced issues with IP-output modules rebooting.

Common for these installations are the TV-sets installed. They have all been Samsung ( Tizen OS ver. 3.0).

The root cause of these reboots are the massive amount of ARP data produced by the TV's.


The TDX headend IPTV multicasts are UDP ( one way broadcast...no "receipt" requested) and ARP data are not needed by the headend.


To prevent the TDX IP-output module from rebooting, please configure the network switch port (connected to the TDX AUX port) to prevent data going from the network to the TDX headend.

The Cisco term is "uni-directional Ethernet" (UDE).




Additional information, (added by SPD June 25):


In general (for any switch) we would suggest you look through the user manuals, and the GUI and CLI, to see if one of the below possibilities exists for the switch.

 

  • Blocking all egress traffic:
     By not allowing any traffic to egress the switch port connected to the TDX, you ensure that no packets from the network can influence the TDX. 
  • Blocking broadcast traffic:
    ARP packets are sent with the broadcast destination MAC address FF:FF:FF:FF:FF:FF.
    Some switches may have a feature to specifically block such traffic.
     Alternatively, you may set up an ACL filtering rule, matching the broadcast address, and choose what should happen for a specific port. ACL rules are a common feature among L3 switches and L2 IGMP capable switches, so there is a good chance that ACL rules can be used.
  • Limitation of broadcast traffic:
    Some switches have network storm mitigation mechanisms, e.g. to prevent a broadcast storm, and such feature may be used to limit how much broadcast traffic is allowed through the switch, and possibly the individual ports.
     In some cases it is even possible to set a maximum Mbps for broadcast traffic.

 

Note that different vendors may user different terms, so a simple search in an user manual for the specific word may not be enough to find out how to configure.

 

Also it is important that the person responsible for the network setup on site is taking the decisions here about what approach to use, and is also responsible for setting up the switches and network in general. It is required to have a very good insight to the network infrastructure to make such decisions, and we, (TRIAX), cannot necessarily decide the best approach for a site.