Hello SunRay-Users, I have faced a problem which I believe was already discussed on the list: a Sun Ray which I have at home to connect to the SRSS4 server in office (then uttsc'ing to a Windows machine), occasionally freezes up.
This seems to correlate with intense video traffic (browsing websites with animated flash ads is one sure way to trigger the problem). This occasionally, but rarely, happens when moving or resizing windows, or scrolling websites. During the freeze-up the screen update is usually halted mid-way; the mouse pointer moves about once every 5-10 seconds. Session sometimes unfreezes about a minute later, or reconnects. Since I use a smartcard, it's a lot faster to take it out and plug back in - the DTU initiates a session reconnection, paints the whole screen; the cycle goes within 10-15 seconds after some training :) I believe from past discussions that this may have to do with UDP packets being dropped by some networking hardware in the middle, so Sun Ray sessions go out of sync. Since this doesn't happen at the office, it should be the local (town-wide) ISP's network hardware, which I can't influence very much (except if I tell the fellow network engineers what to try and fix, and they bother to give it a shot). I don't think MTU should have any impact, since the local network is all Ethernet-based. Since I can reconnect the sessions quickly by re-plugging the smartcard, is there some settable timeout so the DTU firmware would detect a dropped session and reconnect without physical action? Is it possible to use some TCP-based protocol for something, perhaps sent-received packet accounting or heartbeat, so that UDP session-out-of-sync (not due to the whole network going down) would be detected and remedied quickly? I've set utcapture running in my session, but it shows no packet loss so far... What else should I do to gather info on the problem and find what causes it and how to fix it? :) -- Best regards, Jim Klimov mailto:[EMAIL PROTECTED] _______________________________________________ SunRay-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/sunray-users
