Ethereal-users: Re: [Ethereal-users] Filter h225 and h245 problem

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From: "Ronnie Sahlberg" <ronnie_sahlberg@xxxxxxxxxxxxxx>
Date: Fri, 24 Oct 2003 21:13:45 +1000
Some H.225 packets carry H.245 as payload.
Ethereal always places the topmost protocol in the summary pane.

CS for H.225 means that it is a CS PDU and not a RAS PDU.

----- Original Message ----- 
From: arif wijalmoko
To: ethereal-users@xxxxxxxxxxxx
Sent: Friday, October 24, 2003 8:00 PM
Subject: [Ethereal-users] Filter h225 and h245 problem


Dear All,

I have been captured voip trafic, with confguration :

Phone --> PBX --> Linejack gateway ( with software Open H323 PSTN Gateway )
on OS Windows 2000 prof  --> OpenH323 IVR on OS Linux RedHat 9, and Ethereal
aplication (version 0.9.15, with WinPcap 3.0 on Windows 2000 prof ) in other
computer under the same LAN.

I had succesfully capture voip trafic. When I filter h225 protocol with this
syntax :

>tethereal -r openivr -R h225

17  35.091637 167.205.64.164 -> 167.205.64.162 H.225.0 CS: setup
OpenLogicalChannel  911
19  35.173742 167.205.64.162 -> 167.205.64.164 H.225.0 CS: callProceeding
182
23  35.370194 167.205.64.162 -> 167.205.64.164 H.245 CS: connect
OpenLogicalChannel TerminalCapabilitySet TerminalCapabilitySetAck
MasterSlaveDeterminationAck 421
45  35.804589 167.205.64.164 -> 167.205.64.162 H.245 CS: empty
TerminalCapabilitySetAck MasterSlaveDeterminationAck  85
48  35.807435 167.205.64.162 -> 167.205.64.164 H.245 CS: empty
RoundTripDelayRequest  82
 52  35.863096 167.205.64.164 -> 167.205.64.162 H.245 CS: empty
RoundTripDelayResponse  82
896  48.626101 167.205.64.162 -> 167.205.64.164 H.245 CS: empty
CloseLogicalChannel  87
901  48.733747 167.205.64.164 -> 167.205.64.162 H.245 CS: empty
CloseLogicalChannelAck  83
905  48.782127 167.205.64.162 - > 167.205.64.164 H.245 CS: releaseComplete
EndSessionCommand  108
906  48.782924 167.205.64.162 -> 167.205.64.164 H.245 CS: empty
RequestChannelClose  87

there was another protocol ( h245 ) dispaly by tethereal. I don't know why
that was happened ?, What is CS mean in info of h225 protocol ? Could
someone help me out here, I'd greatly appreciate it.


 Thanks,
Arif.


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