Hi,

I am in the process of changing my IP address over and at the moment I have two IP addresses maped to an interface (eth0 & eth0:1).

I am pretty sure that I have moved everything over to the new IP address now but I would like to double check and so I would like to see how much data is being sent through each IP address.

Unfortunately ifconfig and /proc/net/dev both lump the IP addresses together and just report on eth0 as a whole :-/ Is there anything I can use to see this data seperately?

Thank you in advance.

Dan

ifconfig eth0 or ifconfig eth1 should show you the configuration just by themselves. ***EDIT*** Oops sorry I didn't see the eth0:1 are you sure you don't mean eth1?

Nope it's definately eth0 and eth0:1, They are two seperate IP addresses on the same interface.

Thank you for the reply anyway

Maybe you could iptraf and configure filters to only display traffic for the IP of eth0:1

Thank you, I haven't seen iptraf before, looks interesting!

For the archives I have actually just found another way by using ipchains but it actually works rather well! If you set a separate ipchains rule for each IP address then you can see how much data matches each rule.

E.g. If you have three IP addresses on one interface (12.12.12.12 , 45.45.45.45 & 78.78.78.78 all on eth0) you can add the following rules to ipchains...

/sbin/ipchains -A input -d 12.12.12.12
/sbin/ipchains -A input -d 45.45.45.45
/sbin/ipchains -A input -d 78.78.78.78
/sbin/ipchains -A output -s 12.12.12.12
/sbin/ipchains -A output -s 45.45.45.45
/sbin/ipchains -A output -s 78.78.78.78

... these rules don't block traffic but you can now use the commands...

/sbin/ipchains -vxnL input
/sbin/ipchains -vxnL output

... which shows the bytes (second column) that match those rules. You can even grep this output into mrtg to graph the usage of each IP :-)