I capture separately, running tcpdump on each NIC and then
processing the results using tshark. 
You can use mergecap to merge the two files. 
  
Jim 
  
From: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of NADEZHDA
PLOTNIKOVA 
Sent: 23 October 2008 15:13 
To: Community support list for Wireshark 
Subject: Re: [Wireshark-users] a question re capturing on 2 interfaces 
 
 
  
 
  
  
  well it collects on eth but i have 2 Endace DAG 10G optic
  cards and it is not collecting from these interfaces ... when using
  "any" 
   
  
  i think I need to implement vendor patch to pcap  
   
  --- On Wed, 22/10/08, Jaap Keuter <jaap.keuter@xxxxxxxxx>
  wrote: 
   
  
  From: Jaap Keuter
  <jaap.keuter@xxxxxxxxx> 
  Subject: Re: [Wireshark-users] a question re capturing on 2 interfaces 
  To: "Community support list for Wireshark"
  <wireshark-users@xxxxxxxxxxxxx> 
  Date: Wednesday, 22 October, 2008, 5:08 PM 
  
  
  
  
  On Linux etc. you can use the 'any' interface. On Win32
  you may need to have two captures running and later use mergecap to merge
  them. 
   
  
  
  
  
  
  
  
   
    
    
    
    I need to capture data on 2 interfaces - simutaneously
    on eth1 and eth2 (2 network cards). 
     
    
    Which settings in GUI should I use? 
     
    
    Can I write output into the same file?  
     
    
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