[Shou-Kuo Shao <skshao@xxxxxxxxxx>]

Dear  Jaap,

Thanks for the tips. I will try you methods later.

However, I have tried to cpature the phone's packets from three other desktop compuetrs all running Windows XP Professional and can do the work.

My notebook is with Windows XP Home edition, I wionder if this is the problem. 

Best Regards

Shou-Kuo Shao




At ???U?????? 07:23 2008/7/16 +0200, you wrote:
>Hi,
>
>Does the IP phone use vlan tags? That can spell trouble for the windows network 
>driver. Boot up from a Linux live CD with a capture application (Knoppix is a 
>good example) and try capturing with that.
>
>Thanx,
>Jaap
>
>Shou-Kuo Shao wrote:
>> Dear Abhik,
>> 
>> Thank you for the quick reply.
>> 
>> However, the setting of "Capture packets in promiscuous mode" has been 
>> selected crrectly. And the device I used is a pure hub. If I ping the IP 
>> phone from any places, I could capture the ICMP packets with the IP 
>> phone's address. I also could capture any other packets on the net, so 
>> the promiscuous mode should be OK.
>> 
>> 
>> The only problem is the SIP and RTP packets could not be captured. And 
>> no cpature filters has been set.
>> 
>> Best Regards
>> 
>> Shou-Kuo Shao
>> 
>> 
>>  >- When starting the capture, make sure that you select "Capture
>>  >packets in promiscuous mode", otherwise only packets coming to and
>>  >leaving your laptop will be captured and not everything flowing though
>>  >the hub.
>>  >- Make sure you are connecting to a hub and not a switch.  Otherwise
>>  >the capture approach has to be changed.
>>  >
>>  >HTH
>>  >Abhik.
>>  >
>>  >On Wed, Jul 16, 2008 at 12:20 PM, skshao <skshao@xxxxxxxxxx> wrote:
>>  >> Dear gurus,
>>  >>
>>  >> I have installed the Wireshark 1.0.2 in a notebook with a Realtek 
>> RTL8139/810x Family Fast Ethernet Ethernet NIC.
>>  >>
>>  >> Everything seems OK, when I initialize wireshark to capture the 
>> packets over the Ethernet. However, when I attach the notebook to a hub 
>> with a IP Phone attached on another port, strange thing happens. The 
>> Wireshark could capture packets except those of SIP and RTP related 
>> protocols (ex., I ping the IP Phone from the notebook and the packets of 
>> ICMP echo request and reply can be captured). No capture filters has 
>> been assigned in the Wireshark.
>>  >>
>>  >> I then initalize a soft phone in the notebook to communicate with 
>> the Proxy server and use wireshark to capture the SIP packets. The 
>> Wireshrak works well in this way.
>>  >>
>>  >> I have unistalled WinPacp and wireshark with Revo unistaller (in 
>> order to uninstall them completely) and re-install them several times. 
>> The situation doesn't change a bit. It just seems that my notebook could 
>> not cpature the Ethernet packets of SIP and RTP protocols.
>>  >>
>>  >> Can anyone help me or give me a clue to solve this? Thank you very 
>> much for the help!
>>  >>
>>  >> Best Regards
>>  >>
>>  >> Shou-Kuo Shao
>
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