Hi all, clearly this is a newbie question...
I've tried to simplify the problem down to it's essential elements - it hides well over 40 hours of post-installation discussion and investigation, and a very unhappy client
I am using CRS328-24P-4S+RM switches to build a video over IP local network. The Switches all have RouterOS 6.44.1. I am using Crestron's NVX video over IP protocol. (Which is similar to MPEG2 I am led to believe).
There is no other traffic on the network apart from a small number of occasional control packets. The local network does not route to any other network segment.
We have 4 rooms - with a switch in each room. Three of the switches are handling three video encoders, and three video decoders each. ( 9 sources and 9 sinks so far). The fourth switch has 4 encoders and 4 decoders. So that's a system total of 13 sources and 13 sinks.
The encoders are generating data at about 200 Mb/s
Switch 4 also runs DHCP.
Switch 1 & Switch 2 connect directly to Switch 4.
Switch 3 connects to Switch 4 via Switch 2. [Because of the way the rooms are laid out - its too far to get Switch 3 to connect directly to Switch 4]
I hope the sketch works for you...
Switch 2 to Switch 4 is the longest link at about 30 metres, but it IS reporting 10G line speed, and we are using a tested Hellerman CAT 6a cable (for testing) on this link.
The Controller commands the decoders to subscribe to the appropriate encoders. No more than 4 encoders would be active at any one time, and no more than six of the decoders would be subscribing.
The encoders use multicast addressing.
The question is 'why doesn't this just work'?! I don't seem to be getting enough throughput on some combinations of encoder and decoder. For example, combinations that would have to traverse between Switch 2 and Switch 4 don't work, whereas Switch 2 to Switch 3 routes DO work. Any route that only has to traverse a single switch works.
'It works' means there is a 1020p60 image being transferred, whereas 'it doesn't work' means there in no, or only an intermittent image.
Does anyone on the forum have any observations or comments as to what might be wrong? On paper, there ought to be ample throughput.
Thanks all - Jeff