Re: [Ethereal-users] excluding loopback from capture?

[Guy Harris <gharris@xxxxxxxxx>]

Jason Wei wrote:

> I'm in a class that uses Linux machines and Cisco 2611
> routers.  One problem I get is that some interfaces on
> the routers keep sending out loopback packets.  Is
> there a way to exclude these loopback packets from my
> ethereal capture?

Possibly - what identifies the packets as loopback packets?  Do they 
have a particular Ethernet type (as Ethernet loopback packets do, with a 
type of 9000), or are they to or from a particular UDP port number (if 
they're UDP packets), or something such as that?

I.e., "loopback packets" doesn't necessarily uniquely identify a 
particular type of packet; whether it's possible to exclude them depends 
on the type of loopback packet.