Re: The network connection has failed - WHY?

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Neil Smith [MVP Digital Media] (neil_at_nospam.com)
Date: 02/22/04 

Date: Sun, 22 Feb 2004 21:09:32 GMT

On Sun, 22 Feb 2004 17:31:49 +0100, "Gianpiero Colagiacomo"
<gp@1lg.com> wrote:

>Thank you very much for your time spent looking at this - I was unable to
>work out what any of the pathping output meant so your input is invaluable.

No prob - basically, pathping knocks out small packets to routers
between you and the target machine on the net. It sets a 'time to
live' for each packet, and reduces it until it doesnt get a reply.

Thats how it can tell you the 'latency' at each hop on the path.
Pathping differs from the usual ping command, because it can also
query the routers to find out if they support RSVP (resource
reservation protocol) which can help in prioritizing audio and video
data which is time dependent -if they're set up correcty, anyway.

Finally, it can figure out packet loss - if packets are being dropped
it will affect your video quality, if too many get dropped the media
player thinks the connection is lost. Some congested routers drop
20-50% of packets, which must be retransmitted if you are using HTTP
(web server) based video, cause it goes over TCP.

Media servers generally send data over UDP which has less error
correction overhead, but the players can normally make up for that.

>I will contact my client and see where we stand with the ISP and domain
>setup. Hopefully we can resolve this quickly!

Yeah, cool.
Cu - Neil.

>
>Cheers,
>
>GP
>
>"Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
>news:4037fe9d.51592375@news.blueyonder.co.uk...
>> Well the last line of each report is pretty diagnostic !
>> I got the same (01:03GMT Sat 22/02/04)
>>
>> Basically the 'livedns.org.uk servers are not responding at all. I
>> pinged various servers there and they are all 'down'. Neither do they
>> run a website at www.livedns.org.uk .... or if they do, it's borked.
>>
>> >C:\>nslookup http://www.travelcards.eu.com
>> >Server: clunk.fresh-toads.net
>> >Address: 192.168.10.1
>>
>> >*** clunk.fresh-toads.net can't find http://www.travelcards.eu.com:
>Non-existent
>> > domain
>>
>> So my plan would be to suggest to your client to acquire a host who
>> *is* up most of the time , and go with them.
>>
>> From the name tho, livedns sounds like a name-server setup who map
>> dynamic IP addresses (usually ADSL lines) to a static address.
>>
>> Basically, to allow people to run a web server from a home machine
>> even if the IP address changes it is still supposed to be
>> available.These services are often unreliable but can work in some
>> circumstances eg IP videoconferencing.
>>
>> I think people like http://www.dyndns.org (this is **Not** a
>> recommendation or otherwise btw) do similar services.
>>
>> Anyway my guess is your client didnt feel it necessary to invest in a
>> real DNS linked to a static webhost, and possibly they are
>> experiencing the side effects of a spaghetti western style hosting
>> company (aka, cowboys :-p)
>>
>> If you are just hosting static wmv files, I've not had any problems
>> with my free webspace from Blueyonder, and Xcalibre worked out pretty
>> well though they had some (ahem) glitches a few months ago. In any
>> case, nobody will really notice (or care) if you host the wvx files
>> off the main website as long as you keep an eye on the bandwidth
>> usage.
>>
>> Hope that helps -
>> Regards, Neil.
>>
>>
>>
>> On Sat, 21 Feb 2004 23:23:57 +0100, "Gianpiero Colagiacomo"
>> <gp@1lg.com> wrote:
>>
>> >Neil,
>> >
>> >I ran the pathping as you suggested and the following are the results
>> >produced by it. I have no networking experience so it means nothing to
>me -
>> >can you suggest whats going on for me in plain english?
>> >
>> >Thanks in advance....
>> >
>> >GP
>> >
>> >C:\Documents and Settings\GP>pathping -T -R 213.171.218.29
>> >
>> >Tracing route to server218-iis629.livedns.org.uk [213.171.218.29]
>> >over a maximum of 30 hops:
>> > 0 windowsxp [62.11.19.230]
>> > 1 195.130.229.19
>> > 2 195.130.229.3
>> > 3 so-2-0-0.rom11.ip.tiscali.net [213.200.68.25]
>> > 4 so-7-0-0.lon20.ip.tiscali.net [213.200.81.222]
>> > 5 gig-gw2-UK.cableinet.net [195.66.226.34]
>> > 6 194.117.136.173
>> > 7 azt-tele1-pos.telewest.net [194.117.136.1]
>> > 8 80.192.0.2
>> > 9 82.33.224.2
>> > 10 213.48.73.18 reports: Destination net unreachable.
>> >
>> >Checking for connectivity with Layer-2 tags.
>> >
>> > 1 195.130.229.19 OK.
>> > 2 195.130.229.3 OK.
>> > 3 213.200.68.25 OK.
>> > 4 213.200.81.222 OK.
>> > 5 195.66.226.34 OK.
>> > 6 194.117.136.173 OK.
>> > 7 194.117.136.1 OK.
>> > 8 80.192.0.2 OK.
>> > 9 82.33.224.2 OK.
>> > 10 0.0.0.0 General failure.
>> >
>> >Checking for RSVP aware routers.
>> >
>> > 1 195.130.229.19 Non RSVP Aware
>> > 2 195.130.229.3 Request timed out.
>> > 3 213.200.68.25 Request timed out.
>> > 4 213.200.81.222 Request timed out.
>> > 5 195.66.226.34 Non RSVP Aware
>> > 6 194.117.136.173 Request timed out.
>> > 7 194.117.136.1 Non RSVP Aware
>> > 8 80.192.0.2 Non RSVP Aware
>> > 9 82.33.224.2 Non RSVP Aware
>> > 10 0.0.0.0 Could not send the packet. Error code is 10049.
>> >
>> >Computing statistics for 250 seconds...
>> > Source to Here This Node/Link
>> >Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
>> > 0 windowsxp [62.11.19.230]
>> > 0/ 100 = 0% |
>> > 1 139ms 0/ 100 = 0% 0/ 100 = 0% 195.130.229.19
>> > 0/ 100 = 0% |
>> > 2 138ms 0/ 100 = 0% 0/ 100 = 0% 195.130.229.3
>> > 0/ 100 = 0% |
>> > 3 139ms 0/ 100 = 0% 0/ 100 = 0%
>so-2-0-0.rom11.ip.tiscali.net
>> >[213
>> >.200.68.25]
>> > 0/ 100 = 0% |
>> > 4 218ms 0/ 100 = 0% 0/ 100 = 0%
>so-7-0-0.lon20.ip.tiscali.net
>> >[213
>> >.200.81.222]
>> > 0/ 100 = 0% |
>> > 5 168ms 0/ 100 = 0% 0/ 100 = 0% gig-gw2-UK.cableinet.net
>> >[195.66.2
>> >26.34]
>> > 0/ 100 = 0% |
>> > 6 171ms 0/ 100 = 0% 0/ 100 = 0% 194.117.136.173
>> > 0/ 100 = 0% |
>> > 7 174ms 0/ 100 = 0% 0/ 100 = 0% azt-tele1-pos.telewest.net
>> >[194.11
>> >7.136.1]
>> > 0/ 100 = 0% |
>> > 8 187ms 0/ 100 = 0% 0/ 100 = 0% 80.192.0.2
>> > 0/ 100 = 0% |
>> > 9 184ms 0/ 100 = 0% 0/ 100 = 0% 82.33.224.2
>> > 100/ 100 =100% |
>> > 10 --- 100/ 100 =100% 0/ 100 = 0% windowsxp [0.0.0.0]
>> >
>> >
>> >
>> >
>> >"Neil Smith [MVP Digital Media]" <neil@nospam.com> wrote in message
>> >news:4037a3a2.28301225@news.blueyonder.co.uk...
>> >> Is it possible you're getting packet loss on the routed path from the
>> >> new server ? Delivery should be guaranteed using TCP, but the overhead
>> >> is higher, and lat packets might cause the players to stall and assume
>> >> the connection was lost.
>> >>
>> >> Run 'pathping -T -R ipaddress' at a command line to find out (remove
>> >> the quotes, obviously ;-)
>> >>
>> >> Cheers - Neil.
>> >>
>> >>
>> >> On Sat, 21 Feb 2004 14:22:09 +0100, "Gianpiero Colagiacomo"
>> >> <gp@1lg.com> wrote:
>> >>
>> >> >Hi all,
>> >> >
>> >> >I have a client website, hosted on a server WITHOUT Win Media
>streaming
>> >> >ability, on which there are two WMV's. Both are 268k DSL bitrate and
>> >both
>> >> >seem to function perfectly on my test
>> >>
>>server -http://www.1lg.com/portfolio/travelcards2/htdocs/video/hs_hi.wvx
>> >> >and http://www.1lg.com/portfolio/travelcards2/htdocs/video/pa_hi.wvx.
>> >After
>> >> >moving the test area files to the client's live server however I find
>> >that
>> >> >the larger of the two files HS_HI intermittantly errors in WMP-
>> >> >http://www.travelcards.eu.com/video/hs_hi.wvx. I get a "The network
>> >> >connection has failed"error. Like I say though this is intermittant -
>I
>> >> >have had it work but most of the time it generates this error - the
>test
>> >> >server version performs flawlessly 100% of the time -
>> >> >
>> >> >Is there any reason why this live server would function differently to
>> >the
>> >> >other? Neither server is configured for streaming. Looking at the MS
>KB
>> >I
>> >> >have tried setting Win Media Player's connection speed to a fixed
>value
>> >but
>> >> >have the same issue...
>> >> >
>> >> >Cheers,
>> >> >
>> >> >GP
>> >> >
>> >> >
>> >>
>> >> ========================================================
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>> >>
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>> >
>> >
>>
>> ========================================================
>> CaptionKit http://www.captionkit.com : Produce subtitled
>> internet media, transcripts and searchable video. Supports
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>>
>> VideoChat with friends online, get Freshly Toasted every
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>
>

========================================================
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