How much bandwidth consumes SmartSDRCAT and DDutil in WAN VPN mode?

Kari Gustafsson SM0HRP

Hello OM:s. I understand that CAT controll of PA:s etc with SDR CAT (and DDutil to lesser extent perhaps) requires some bandwidth. Anyone know how much they consume in kbps? I am in the process of putting up a WAN VPN remote solution over 4G LTE till WAN v.2.0 is offered.
73s Kari SM0HRP   

Mike va3mw

Kari

I'm sure someone has the measurements, but your largest concern will be the latency of the system, not the bandwidth.

Mike va3mw

Kari Gustafsson SM0HRP

Hi Mike, How do you mean. My latency now is about 40 ms on 4G. Will the VPN as such add much? 73s Kari

Al K0VM

Karl,  The primary network bandwidth for SSDR is the PA, WF and remote audio functions.  The PA and WF bandwidth are dependent on the screen size and update rates..  If you are using DAX, that also consumes bandwidth. CAT/DDUtil use very little in comparison.  If you can open Windows Resource Monitor and look in the network tab you can see the network loading for SSDR.   ( remember kbps = 8x Kbps ) and separately DAX and CAT.

AL, K0VM

Kari Gustafsson SM0HRP

Hi Al, thanks for input bit I do not own a Flex yet. I run a remote contest station now with K3:s, Acom 2000 and OM 2500/and three towers and I am investigating whether a 6700 could be an alternative for a SO2R given my 4G uplink bandwidth (2-3 Mbs with 100% excess bandwidth in case). A VPN " guru" indicated that CAT was almost like Dax " eating bandwidth ". I understand that 1 Mbs is needed for 2-3 panadapters in slow update mode. So have one Mbs left for CAT es Ddutil if enough. 73 Kari SM0HRP

Mike va3mw

Kari

If you have a vpn guru, I would recommend that when you get a flex, then he might be able to wireshark it and figure it out.  Maybe you might be able to borrow one at some point.

The CAT data updates are very infrequent in the overall scheme and I very highly doubt that it will even be noticeable.  

Al K0VM

Karl,
   I have never seen CAT as being a large consumer of network bandwidth..  But I suppose it could depend on how active the external ( logging, modem, etc. ) program is.. At the moment my CAT is using  about 10KBps.   and DDUtil is running 5KBps. YMMV

AL, K0VM

Kari Gustafsson SM0HRP

Michael and Al it was the "VPN guru" K6OZY who indicated it in his excellent VPN tutorial that CAT was quite in need of bandwidth in his set-up. Again it depends on what you may use the CAT for as you say Al most items do not need that much bandwidth I suppose. E g ACOM2000A works only on 9600 baudot.
BTW I have tried looking into getting VPN working and that seems to quite a djungle to get a grasp of what your 4G router is capable in respect of UDP allowable VPN channeling and your local PC router. 
Hopefully SDR WAN v.2.0 is not far away.....