On Friday 21 November 2003 22:07, Guy Teverovsky wrote:
> On Fri, 2003-11-21 at 09:13, Shlomo Solomon wrote:
> > 1 - Is there any way to check if the MTU is actually set as it should
> > be? I tried **playing** with ethereal a bit, but to be honest, I
> > have no idea what I'm looking for and there is so much info that
> > I'm lost ;-)
> Use this little app: http://www.dslreports.com/drtcp
And I thought we were on a Linux mailing list...
Now to the original question. There are two things you may want:
* If you want to see the MTU on the Linux box than simply:
run ifconfig -a:
eth0 Link encap:Ethernet HWaddr 00:E0:18:95:3F:9C
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20712682 errors:0 dropped:0 overruns:0 frame:0
TX packets:23745827 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:994130707 (948.0 Mb) TX bytes:115661852 (110.3 Mb)
Interrupt:5 Base address:0x8800
and you have it on the third output line.
* If you want to *measure* the size of packets actually transmitted,
than ethereal is your friend. I want attach a screenshot (it would
be striped anyway), but just:
- Select Capture->Start
- Put in the 'Filter' field an expression to limit what is captured.
Examples:
'host mywinbox' (without the quotes, if you want just one box)
'port 80' (if you want just web trafic)
'host mywinbox and port 80'
This is the language used by tcpdump as well -- so read man tcpdump.
- After stoping the filter, select any packet on the top window pane
and you'll see its details in the lower pane.
- The first line of the lower pane tells you the frame detail (including
its size).
Hope it helps,
--
Oron Peled Voice/Fax: +972-4-8228492
[EMAIL PROTECTED] http://www.actcom.co.il/~oron
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