Server access over Radio Links
Posted on 2014-08-27
I have two sites - Main and Shop2.
They have a radio link between them (throughput is between 100-140Mbps)
For ease I sent the radios as a bridge, so the LAN at Shop2 is an extension of the LAN at the Main location.
The PC at both locations have redirected folders - Desktop, My Documents, App Data to a share on the File Server at the Main location,
Also at the Main location is the ERP system which is an SQL based application.
The application is run from a mapped drive to the SQL server.
The radios started failing so both were replaced with the latest model and now things are not working as expected.
The ERP system operates so slow it is un-usable.
From Shop 2, If I ping the server I loose a lot of packets (4 out of 25). If I ping the LAN interface on the router I loose 1 out of 50 packets and if I ping the radio at the Main shop, I don't loose any packets.
This is were things get confusing. Pinging the Radio and not loosing any packets would indicate the radio link is good, which is also what the radio monitoring/management software indicates.
So why would I get a greater packet loss when pining the server over the router.
Just to make it even more confusing.
At the Main site - If I ping the servers - there is no packet loss.
If I ping the radio at the main site, there is packet loss around 4 per 25 packets.
All this could point to a cable problem between the main site radio and the switch. However if this is the case, why when I ping from Shop 2, to the router is minimal packet loss.
Again this all started to happen with the replacement of the radios.
So if the radios are causing the problem, but the link is good, what good it be?
My only possibility would be the delay across the radios has increased, but would a small increase in the delay cause this type of issue?
IF this is the case are there any settings on the servers/PC's that I could change to compensate for the increased delay?
Any ideas on how to fix this would be helpful.