ref: 9ca6d2be9980c59f0e94ca937a22d2513268d836
dir: /ipconfig.ms/
Configuring a second interface to use the same IP stack: First, check to ensure that both devices can be detected: .P1 ; ls '#l0' '#l0/ether0' ; ls '#l1' '#l1/ether1' .P2 If the device cannot be detected, you will see: .P1 ; ls '#l2' ls: #l2: no free devices .P2 Next, bind the device to a new IP stack in /net.alt, then use ipconfig to add the address: .P1 ; bind -b '#l1' /net.alt ; bind -b '#I1' /net.alt ; ip/ipconfig -x /net.alt -g 198.51.100.1 ether /net.alt/ether1 add 198.51.100.2 255.255.255.0 .P2 Replace 198.51.100.1 with your actual default gateway, 198.51.100.2 with your public IP address, 255.255.255.0 with your subnet mask. If configured properly, /net.alt/iproute should show routes similar to these: .P1 ; cat /net.alt/iproute 0.0.0.0 /96 198.51.100.1 4 none 0 198.51.100.0 /120 0.0.0.0 /96 198.51.100.1 4 none 0 198.51.100.2 /128 .P2 From another machine, ping the IP address 198.51.100.2: .P1 another% ip/ping 198.51.100.2 .P2 Then, on the machine with 198.51.100.2, verify with snoopy that packets are received on the correct interface with correct ethernet and correct IP address: .P1 cpu% snoopy -f 'icmp' /net.alt/ether1 after optimize: ether(ip(icmp)) 001703 ms ether(s=00907fa36c07 d=f2b2b3daeb64 pr=0800 ln=78) ip(s=172.56.234.40 d=198.51.100.2 id=0000 frag=0000 ttl=230 pr=1 ln=64) icmp(t=EchoReq c=0 ck=c851 id=d809 seq=2a65) dump(1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b) 002209 ms ether(s=00907fa36c07 d=f2b2b3daeb64 pr=0800 ln=78) ip(s=172.56.234.40 d=198.51.100.2 id=0000 frag=0000 ttl=230 pr=1 ln=64) icmp(t=EchoReq c=0 ck=c850 id=d809 seq=2a66) dump(1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b) .P2