Ethereal/Wireshark Analysis - Revision history

Gijs at 11:02, 6 February 2007

2007-02-06T11:02:03Z

Gijs at 11:01, 6 February 2007

2007-02-06T11:01:30Z

Gijs: Ethereal Analysis moved to Ethereal/Wireshark Analysis: Ethereal continues under the new name Wireshark

2007-02-01T13:28:56Z

Ethereal Analysis moved to Ethereal/Wireshark Analysis: Ethereal continues under the new name Wireshark

Gijs at 13:19, 1 February 2007

2007-02-01T13:19:21Z

Gijs at 13:18, 1 February 2007

2007-02-01T13:18:25Z

Gijs at 13:16, 1 February 2007

2007-02-01T13:16:38Z

Gijs: /* Voice-only with different codecs */

2007-02-01T13:10:16Z

Voice-only with different codecs

Gijs: /* Voice-only with different codecs */

2007-02-01T12:38:38Z

Voice-only with different codecs

Gijs at 12:37, 1 February 2007

2007-02-01T12:37:35Z

Gijs: /* Differences between voice and video */

2007-01-30T19:32:32Z

Differences between voice and video

← Older revision		Revision as of 11:02, 6 February 2007
Line 1:		Line 1:
	* [[Traffic measurements Audio]]		* [[Traffic measurements Audio]]
	* [[Traffic measurements Video]]		* [[Traffic measurements Video]]
−
−
−	* [[Voice only analysis]]
−	* [[Voice and video analysis]]
−	* [[Voice-only with different codecs]]

@@ Line 1: / Line 1: @@
 * [[Voice only analysis]]
 * [[Voice and video analysis]]
 * [[Voice-only with different codecs]]

← Older revision		Revision as of 13:19, 1 February 2007
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	* [[Voice and video analysis]]		* [[Voice and video analysis]]
	* [[Voice-only with different codecs]]		* [[Voice-only with different codecs]]
−
−
−
−
−	~~= Voice and video analysis =~~
−
−	~~Schematic sketch of the situation:~~
−
−	~~[[image:Schematic overview asterisks and sip-phones.gif\|Schematic overview of the test-setup. The colors in the sketch match the colors in the following Ethereal-screenshots]]~~
−
−	~~In the screenshot below, the following events were measured:~~
−	* @4 sec: Video was turned on
−	* @14 sec: Video was set to black (connection lost with DVdriver)
−	* @20 sec: Video showed moving pictures again.
−
−	~~[[Image:ethereal_graph_voice_and_one-way-video.png]]~~
−
−	~~Legenda:~~
−	* '''Black''': traffic from and to Trixbox #1
−	* '''Red''': traffic between the 2 Windows machines running X-lite
−	* '''Green''': traffic between laptop #1 and its Asterisk
−	* '''Blue''': traffic between the two Asterisk PBX's
−	* '''Pink''': traffic between Windows machine #1 and its Asterisk
−
−	~~The following graph shows the traffic is almost constant.~~
−	~~Till 35sec the conversation included audio and video. The rest is audio-only.~~
−
−	~~[[Image:ethereal_graph_voice_and_one-way-video2.png]]~~
−
−	~~This measurement shows there is no traffic between both SIP-phones, only via (both) Asterisk PBX.~~
−
−	~~= Differences between voice and video =~~
−	For this test ([http://thales.td-er.nl/EtherealDumps/Traffic%20between%202%20SIP%20phones%20with%201%20PBX%20and%201%20camera.rar captured Ethereal data]), we connected 2 SIP phones to the same Asterisk PBX.
−	~~We measured the bandwitdh used between the following 3 points:~~
−
−	~~# SIP-phone #1 with camera~~
−	~~# SIP-phone #2 without camera~~
−	~~# Asterisk PBX~~
−
−	[[image:ethereal_graph_difference_voice and video.png\|Ethereal graph showing the differences in traffic between audio and video (resp. g711u and H263-1998 codec). Black: from SIP-phone #1 to PBX. Blue: from SIP-phone #2 to PBX
−	~~Pink: all traffic between SIP-phone #1 and the PBX ]]~~
−
−	~~'''Legenda:'''~~
−	* '''Black''' shows audio & video from ''SIP-phone #1'' to the PBX (video starting at the 10<sup>th</sup> second)
−	* '''Blue''' shows audio-only from ''SIP-phone #2'' to the PBX
−	* '''Pink''' shows all traffic between ''SIP-phone #1'' and the PBX (both directions)
−
−	~~The debug-screen [[image:X-lite debug-info.png\|right\|315px\|X-lite debug-screen]] of X-lite (Ctrl + F9) told us the SIP-phone assumed a total available bandwith of 256/256 kbps.~~
−	~~This was filled with 64 kbps for speech (protocol g711u) and 131 kbps for video (protocol H263-1998)~~
−
−	~~When looking at the speech traffic:~~
−	* 50 packets/sec (measured with Ethereal)
−	* 214 Bytes/packet (measured with Ethereal)
−	* +/- 10,7 kByte/s
−	* 160 bytes audio-data per packet (64 kbps = 8000 Bytes/sec, 50 packets/sec)
−	* UDP-packet-header: 28 Bytes.
−
−	~~Measured IAX-overhead: (the g711u codec uses a CBR of 64kbps) 214 - 28 - 160 = 26 Bytes/packet.~~
−	~~Thus 1300 Bytes/sec IAX overhead. (10k4 bps)~~

← Older revision		Revision as of 13:18, 1 February 2007
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−
−	~~= Voice only analysis =~~
−
−	~~The following screenshot shows network-traffic (in Bytes/s) for the following connections:~~
−
−	* '''Black''': traffic from and to Trixbox #1
−	* '''Red''': traffic between the 2 Windows machines running X-lite
−	* '''Green''': traffic between laptop #1 and its Asterisk
−	* '''Blue''': traffic between the two Asterisk PBX's
−	* '''Pink''': traffic between Windows machine #1 and its Asterisk
−
−	~~[[Image:ethereal_graph_voice-only.png\|Ethereal graph showing voice-only traffic]]~~
−
−	~~From the graph shown above there can be concluded that indeed the two X-Lite machines are only connected to their own Trixbox, i.e. there is no ''direct'' traffic between the two X-Lite machines.~~

	= Voice and video analysis =		= Voice and video analysis =

@@ Line 1: / Line 1: @@
 = Voice only analysis =
@@ Line 68: / Line 75: @@
 Measured IAX-overhead: (the g711u codec uses a CBR of 64kbps) 214 - 28 - 160 = 26 Bytes/packet.
 Thus 1300 Bytes/sec IAX overhead. (10k4 bps)

← Older revision	Revision as of 13:28, 1 February 2007
(No difference)

← Older revision		Revision as of 13:10, 1 February 2007
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	Voice-call between 201 (GSM-codec) and 301 (G711u codec)		Voice-call between 201 (GSM-codec) and 301 (G711u codec)
		+	* Traffic to and from Ext. 201 is Green
		+	* Traffic to and from Ext. 301 is Red
		+	* Traffic between Asterisk-boxes is Blue
		+
		+	Used filters in I/O-graph:
		+	Filter-Black: proto=sip
		+	Filter-Red : ip.addr == 192.168.1.3 && ip.addr == 192.168.1.106
		+	Filter-Green: ip.addr == 192.168.1.189 && ip.addr == 192.168.1.101
		+	Filter-Blue : ip.addr == 192.168.1.106 && ip.addr == 192.168.1.101
		+	Filter-Pink : ip.addr == 192.168.1.100 && ip.addr == 192.168.1.101
		+
		+	[[image:Wireshark-graph_GSM_G711_traffic_Bps.png]]
		+
		+	This doe not tell us which Asterisk box makes the conversion between the GSM codec and the G711u codec.
		+	Therefore we made another graph with the traffic meassured only in one direction.
		+
		+	Used filters in I/O-graph:
		+	Filter-Black: ip.src == 192.168.1.101 && ip.dst == 192.168.1.106
		+	Filter-Red : ip.src == 192.168.1.3 && ip.dst == 192.168.1.106
		+	Filter-Green: ip.src == 192.168.1.189 && ip.dst == 192.168.1.101
		+	Filter-Blue : ip.src == 192.168.1.106 && ip.dst == 192.168.1.101
		+	Filter-Pink : ip.src == 192.168.1.100 && ip.dst == 192.168.1.101
		+
		+	[[image:Wireshark-graph_GSM_G711_traffic_Bps_oneway-traffic.png]]

← Older revision		Revision as of 12:38, 1 February 2007
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	[[image:schematic_of_PC-config.png\|Schematic overview of all PC's running which software.]]		[[image:schematic_of_PC-config.png\|Schematic overview of all PC's running which software.]]
		+
		+	Voice-call between 201 (GSM-codec) and 301 (G711u codec)

← Older revision		Revision as of 12:37, 1 February 2007
Line 68:		Line 68:
	Measured IAX-overhead: (the g711u codec uses a CBR of 64kbps) 214 - 28 - 160 = 26 Bytes/packet.		Measured IAX-overhead: (the g711u codec uses a CBR of 64kbps) 214 - 28 - 160 = 26 Bytes/packet.
	Thus 1300 Bytes/sec IAX overhead. (10k4 bps)		Thus 1300 Bytes/sec IAX overhead. (10k4 bps)
		+
		+
		+	== Voice-only with different codecs ==
		+	Situation:
		+
		+	[[image:schematic_of_PC-config.png\|Schematic overview of all PC's running which software.]]

@@ Line 41: / Line 41: @@
 = Differences between voice and video =
-For this test (captured Ethereal data:[[Media:Traffic between 2 SIP phones with 1 PBX and 1 camera.rar]]), we connected 2 SIP phones to the same Asterisk PBX.
+For this test ([http://thales.td-er.nl/EtherealDumps/Traffic%20between%202%20SIP%20phones%20with%201%20PBX%20and%201%20camera.rar captured Ethereal data]), we connected 2 SIP phones to the same Asterisk PBX.
 We measured the bandwitdh used between the following 3 points: