Here I am answering my own mail. I want to first apologize for the noise. I had a bridge0 on ix1 and it caused the duplicate frame in bpf.
beta# ifconfig bridge0 destroy beta# tcpdump -v -n -i ix1 -p host 192.168.177.1 tcpdump: listening on ix1, link-type EN10MB 11:47:50.399067 192.168.35.6 > 192.168.177.1: icmp: echo request (id:f516 seq:0) [icmp cksum ok] (ttl 63, id 49164, len 84) 11:47:50.399372 192.168.177.1 > 192.168.35.6: icmp: echo reply (id:f516 seq:0) [icmp cksum ok] (ttl 255, id 33473, len 84) 11:47:52.620324 192.168.35.6 > 192.168.177.1: icmp: echo request (id:f616 seq:0) [icmp cksum ok] (ttl 63, id 5106, len 84) 11:47:52.620597 192.168.177.1 > 192.168.35.6: icmp: echo reply (id:f616 seq:0) [icmp cksum ok] (ttl 255, id 17578, len 84) There was nothing on the bridge but ix1 itself. Sorry, -peter On Sat, Feb 23, 2019 at 11:18:47AM +0100, Peter J. Philipp wrote: > Hi, > > Can anyone confirm this for me? My ix1 is duplicating frames (10 gig copper). > I switched the ports on the switch as well, it carried over. > > I did a ping from a mac mini from behind this router and it did not carry over > a duplicate, so I'm wondering whether it's just a bpf bug? > > beta# tcpdump -v -n -i ix1 -p host 192.168.177.1 > > tcpdump: listening on ix1, link-type EN10MB > > 11:11:42.653222 192.168.35.6 > 192.168.177.1: icmp: echo request (id:ef16 > seq:0) [icmp cksum ok] (ttl 63, id 51288, len 84) > > 11:11:42.653527 192.168.177.1 > 192.168.35.6: icmp: echo reply (id:ef16 > seq:0) [icmp cksum ok] (ttl 255, id 50908, len 84) > > 11:11:42.653583 192.168.177.1 > 192.168.35.6: icmp: echo reply (id:ef16 > seq:0) [icmp cksum ok] (ttl 255, id 50908, len 84) > > > gaia:~ pjp$ ping -c 1 192.168.177.1 > PING 192.168.177.1 (192.168.177.1): 56 data bytes > 64 bytes from 192.168.177.1: icmp_seq=0 ttl=254 time=0.827 ms > > --- 192.168.177.1 ping statistics --- > 1 packets transmitted, 1 packets received, 0.0% packet loss > round-trip min/avg/max/stddev = 0.827/0.827/0.827/0.000 ms > > I've had this before and it was a bad cable but I think the duplicates carried > over then..here they aren't being routed/carried over. > > beta# ifconfig ix1 > ix1: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu > 1500 > lladdr a0:36:9f:f7:8a:69 > description: default > index 2 priority 0 llprio 3 > groups: egress > media: Ethernet autoselect (10GbaseT full-duplex) > status: active > inet 192.168.177.2 netmask 0xffffff00 broadcast 192.168.177.255 > inet6 fe80::3a86:c66b:231:9e6e%ix1 prefixlen 64 scopeid 0x2 > inet6 2001:db8:0:30::112 prefixlen 64 > > That's the interface in question. > > Best Regards, > -peter
