Monitor session gets no voice vlan packets??

Unanswered Question
Feb 1st, 2009

<p>I have Wireshark on a laptop on a fast 0/1/2 port in promiscuous mode.  The weird part is all I see from fast 0/1/5 port is packets from the data vlan (1 in this case), broadcast, cdp and such, I see no packets from the phone attached to 0/1/5.  Platform is UC520 with integrated 8 port switch running 12.4(22)T.  Anybody ever see this before.  What is even stranger is that I did the same config on the UC520 in our lab and I got packets from the phones fine??  I have attached the entire config. </p>

<p>interface FastEthernet0/1/2<br />

 switchport voice vlan 100</p>

<p>interface FastEthernet0/1/5<br />

 switchport voice vlan 100<br />

 spanning-tree portfast</p>

<p>!<br />

interface Vlan1<br />

 description **DATA VLAN**<br />

 ip address 10.0.0.3 255.255.255.0<br />

 ip access-group inside_out in<br />

 ip nat inside<br />

 ip inspect CBAC in<br />

 ip inspect CBAC out<br />

 ip virtual-reassembly<br />

!<br />

interface Vlan100<br />

 description **VOICE VLAN**<br />

 ip address 10.1.1.1 255.255.255.0<br />

 ip virtual-reassembly</p>

<p><br />

monitor session 1 source int fast 0/1/5 both<br />

monitor session 1 dest int fast 0/1/2</p>

<p><br />

Thanks in advance,<br />

Tony</p>

I have this problem too.
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mchin345 Fri, 02/06/2009 - 12:01

Try this command in your configuration

monitor session 1 source interface Fa0/1/5

monitor session 1 destination interface Fa0/1/2

tcekada Fri, 02/06/2009 - 12:11

Thanks but that did not make a difference. I think the UC500 is incapable on sending anything but packets from the data vlan1 to a sniffer and I do not know why.

Tony

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