[tcpdump-workers] capturing packets with identical MAC for source and destination

2013-09-03 Thread Lentes, Bernd
Hi, currently we are expierencing bad network performance. And in the log of a linux-server i have a lot of these messages: Sep 2 10:16:08 pc60181 kernel: [4286760.823563] br0: received packet on eth0 with own address as source address Sep 2 10:16:08 pc60181 kernel: [4286760.823680] br0: rece

Re: [tcpdump-workers] capturing packets with identical MAC for source and destination

2013-09-03 Thread Gisle Vanem
"Lentes, Bernd" wrote: I'd like to capture all packets which have the same MAC-address for sender and destination. But i don't know the MAC which is causing these messages. So i have to use an universal filter. I tried to use "tcpdump 'ether[8:6] = ether[14:6]'". Beginning with byte 8 is the

Re: [tcpdump-workers] capturing packets with identical MAC for sourceand destination

2013-09-03 Thread David Laight
> currently we are expierencing bad network performance. And in the log of a > linux-server i have a lot > of these messages: > > Sep 2 10:16:08 pc60181 kernel: [4286760.823563] br0: received packet on eth0 > with own address as > source address Since you know your own MAC address, you can jus

Re: [tcpdump-workers] capturing packets with identical MAC for source and destination

2013-09-03 Thread Lentes, Bernd
Gisle wrote: > > "Lentes, Bernd" wrote: > > > I'd like to capture all packets which have the same > MAC-address for sender and destination. > > But i don't know the MAC which is causing these messages. > So i have to use an universal filter. > > I tried to use "tcpdump 'ether[8:6] = ether[14:6]'"