Ethereal-users: RE: [Ethereal-users] Ethereal very slow when monitoring a spanned port
Thanks! That did the trick.
I see "ability to read from multiple interfaces at once" on the wish
list for Ethereal, but wonder if it is/will be capable of being pointed
to one of multiple NICs on a PC that had more than one?
-- Tom
-----Original Message-----
From: Neulinger, Nathan [mailto:nneul@xxxxxxx]
Sent: Monday, May 07, 2001 12:48 PM
To: Suhrstedt, Tom; ethereal-users@xxxxxxxxxxxx
Subject: RE: [Ethereal-users] Ethereal very slow when monitoring a
spanned port
Turn off dns resolution. You probably are having trouble issuing network
requests through the span port.
-- Nathan
> -----Original Message-----
> From: Suhrstedt, Tom [mailto:tsuhrstedt@xxxxxxxxxx]
> Sent: Monday, May 07, 2001 11:47 AM
> To: ethereal-users@xxxxxxxxxxxx
> Subject: [Ethereal-users] Ethereal very slow when monitoring a spanned
> port
>
>
> I downloaded the 0.8.17 and the latest WinPcap and successfully ran
> Ethereal on Win2K machines to monitor the normal traffic on
> the network
> port of a PC (with 256 Mbytes memory) with good performance, even with
> real time display and scrolling. I was impressed.
>
> However, when I try to span traffic from a Cisco 5505 switch
> port to the
> PC's port, I get very slow performance for anything
> (including Ethereal)
> on that PC, with extremely long times to move or resize a window or
> refresh the display and Ethereal will sometimes just hang. Even if I
> disable real time display and scrolling and just do a capture
> things are
> very slow, and it will take about ten minutes to load about
> 800 packets
> into the display after the capture has been stopped. I got the same
> behavior whether I used a laptop or a tower PC using different NIC
> cards.
>
> This happens even if I span the traffic from only one port,
> so it seems
> like it has something to do with spanning and promiscutiy
> more that the
> traffic volume. I know this is beta software, but was hoping that
> someone could confirm this behavior or point out the error of
> my ways.
>
> Many thanks.
> ---
> Tom Suhrstedt
>
>
> _______________________________________________
> Ethereal-users mailing list
> Ethereal-users@xxxxxxxxxxxx
> http://www.ethereal.com/mailman/listinfo/ethereal-users
>
