Re: monitoring traffic/bandwidth on a bridge

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To: <misc@...>
Date: Tuesday, February 27, 2007 - 7:38 am

> > # ntop -i bridge0

and it stops running... try darkstat but read on.

> > Unless I am misunderstanding the concept of a bridge, I don't think a

to clarify - an interface which is a member of a bridge can have an
address, the bridge{0,1,2,...} itself can't.

> Try assigning an address to one of the bridge interfaces

bpf looks at packets to/from the nic, not the whole bridge.
You need to run two instances, one pointed at each interface,
to see all the traffic. And with this problem with ntop,
you need dummy IP addresses on all the interfaces.

> though that's not a common configuration.

(It's not uncommon either; one scenario is when you have a small
subnet from an ISP, want to place a packet filter between the router
and the LAN, don't want to burn most IP addresses, and want the
filter to be manageable in-band.)

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Messages in current thread:
monitoring traffic/bandwidth on a bridge, Ross Davis, (Thu Feb 22, 12:53 pm)
Re: monitoring traffic/bandwidth on a bridge, Lars Hansson, (Mon Feb 26, 10:16 pm)
Re: monitoring traffic/bandwidth on a bridge, Lawrence Horvath, (Mon Feb 26, 2:16 pm)
Re: monitoring traffic/bandwidth on a bridge, Ross Davis, (Mon Feb 26, 2:07 pm)
Re: monitoring traffic/bandwidth on a bridge, Olaf Schreck, (Tue Feb 27, 5:06 am)
Re: monitoring traffic/bandwidth on a bridge, Stuart Henderson, (Tue Feb 27, 7:38 am)
Re: monitoring traffic/bandwidth on a bridge, Andreas Bihlmaier, (Thu Feb 22, 2:12 pm)