Routing by proxyarp maybe? mps > On May 29, 2021, at 5:39 AM, Ian! D. Allen <idallen [ at ] idallen [ dot ] ca> wrote: > > I used tcpdump to capture a minute of ARP traffic on my Distributel/Rogers > cable modem interface: > > # tcpdump -nelvvs9999 -i eth2 arp >distributel_arp.txt > # wc distributel_arp.txt > 8511 187220 1538942 distributel_arp.txt > > It recorded 8,511 packets - 141 ARP packets per second! > > Sample: > > 14:13:00.519062 00:17:10:93:5d:91 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Ethernet (len 6), IPv4 (len 4), Request who-has 174.116.5.41 tell 174.116.4.1, length 46 > > Some statistics on that one minute: > > $ grep -P -o 'tell \K[^ ,]*' distributel_arp.txt | sort | uniq -c | sort -n | nl | tail > 98 276 45.2.46.129 > 99 295 104.234.93.1 > 100 304 97.108.196.1 > 101 354 174.116.20.1 > 102 648 174.116.24.1 > 103 691 174.116.22.1 > 104 768 174.116.4.1 > 105 798 174.116.26.1 > 106 961 174.116.6.1 > 107 1024 174.116.8.1 > > > $ grep -P -o 'who-has \K[^ ]*' distributel_arp.txt | sort | uniq -c | sort -n | nl | tail > 2903 9 174.116.5.50 > 2904 9 174.116.6.22 > 2905 9 174.116.7.21 > 2906 9 174.116.8.204 > 2907 10 72.141.52.157 > 2908 11 174.116.8.165 > 2909 11 174.116.8.234 > 2910 13 174.116.6.218 > 2911 16 174.116.22.127 > 2912 16 24.52.219.121 > > I presume anyone else with a cable modem sees the same thing? > > -- > | Ian! D. Allen, BA, MMath - idallen [ at ] idallen [ dot ] ca - Ottawa, Ontario, Canada > | Home: www.idallen.com Contact Improvisation Dance: www.contactimprov.ca > | Former college professor (Free/Libre GNU+Linux) at: teaching.idallen.com > | Defend digital freedom: http://eff.org/ and have fun: http://fools.ca/ > > To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org > To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org > To visit the archives: https://lists.linux-ottawa.org > To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org