Thank you for responding, I appreciate it. That is most interesting and would explain what I'm seeing, is this "little specific thing" documented somewhere? How did you find this out? ----- Original Message ----- From: "Anton Danilov" <littlesmilingcloud@xxxxxxxxx> To: "Leroy Tennison" <leroy@xxxxxxxxxxxxxxxx> Cc: "lartc" <lartc@xxxxxxxxxxxxxxx> Sent: Wednesday, February 14, 2018 1:58:20 AM Subject: Re: How to address 'ping -I <interface>' failure Hello. There is a little specific thing with "-I <iface>" usage in the ping tool. When you specify an interface name in the -I option, the ping tool work as if the destinated host is in directly-connected segment. If you run the tcpdump, you will see the arp requests to resolve the destinated ip address. So, use the -I option with interface names only to ping directly attached host or if you have proxy-arp enabled gateway. On 22 January 2018 at 19:55, Leroy Tennison < [ mailto:leroy@xxxxxxxxxxxxxxxx | leroy@xxxxxxxxxxxxxxxx ] > wrote: Background: 2 wan interfaces - call them 12.14.16.18 on eth0 (not the issue) and 98.100.102.105 on eth1 (both /29), 'ping -I 98.100.102.105 [ http://google.com/ | google.com ] ' works but 'ping -I eth1 [ http://google.com/ | google.com ] ' returns 'From 98.100.102.105 icmp_seq=1 Destination Host Unreachable' 'cat /etc/iproute2/rt_tables' shows (leaving out commented lines) 255 local 254 main 253 default 0 unspec 1 fbr 3 dsl ip rule shows (leaving out default and ipsec) 10000: from all fwmark 0x1/0xff lookup fbr 10002: from all fwmark 0x3/0xff lookup dsl 20000: from 12.14.16.18 lookup fbr 20000: from 98.100.102.105 lookup dsl ip route show table dsl has (leaving out OpenVPN and other local non-Internet interfaces) default via 98.100.102.108 dev eth1 src 98.100.102.105 [ http://98.100.102.104/29 | 98.100.102.104/29 ] dev eth1 proto kernel scope link src 98.100.102.105 98.100.102.108 dev eth1 scope link src 98.100.102.105 I'm just beginning to learn about multiple routing tables so I tried the following suspecting it wouldn't work (and it didn't): 'ip rule add from eth1 table dsl' and got 'Error: ??? prefix is expected rather than "eth1" ' What do I need to do to get 'ping -I eth1 [ http://google.com/ | google.com ] ' to work? Thanks for your help. -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to [ mailto:majordomo@xxxxxxxxxxxxxxx | majordomo@xxxxxxxxxxxxxxx ] More majordomo info at [ http://vger.kernel.org/majordomo-info.html | http://vger.kernel.org/majordomo-info.html ] -- Anton. -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
