K0=10.42.1.30 K1=10.42.0.14 PG=10.42.1.29
=== a6 시도 ① eth0 (예제 그대로) ===
Cannot find device "eth0"
=== ② 이 게스트에 무엇이 있나 ===
lo               UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP> 
enp1s0           UP             52:54:00:aa:bb:12 <BROADCAST,MULTICAST,UP,LOWER_UP> 
flannel.1        UNKNOWN        da:f1:1f:7f:9e:da <BROADCAST,MULTICAST,UP,LOWER_UP> 
cni0             UP             c6:f2:76:f6:72:0e <BROADCAST,MULTICAST,UP,LOWER_UP> 
veth5f5079ef@if2 UP             7a:c7:1b:85:f0:92 <BROADCAST,MULTICAST,UP,LOWER_UP> 
veth5ef1875b@if2 UP             82:ef:56:9c:1d:52 <BROADCAST,MULTICAST,UP,LOWER_UP> 
veth8d0ac36c@if2 UP             56:50:6c:30:63:ac <BROADCAST,MULTICAST,UP,LOWER_UP> 
=== 시도 ② 미검증 두 줄 — 물리 쪽 ===
IP 10.42.1.30.7800 > 10.42.0.14.50799: Flags [.], ack 208, win 509, options [nop,nop,TS val 2179731813 ecr 4085265222], length 0
06:02:02.268760 IP 192.168.122.12.53654 > 192.168.122.11.8472: OTV, flags [I] (0x08), overlay 0, instance 1
IP 10.42.1.30.7800 > 10.42.0.14.50799: Flags [P.], seq 238:336, ack 208, win 509, options [nop,nop,TS val 2179731905 ecr 4085265222], length 98
06:02:02.309848 IP 192.168.122.11.60237 > 192.168.122.12.8472: OTV, flags [I] (0x08), overlay 0, instance 1
IP 10.42.0.14.50799 > 10.42.1.30.7800: Flags [.], ack 336, win 823, options [nop,nop,TS val 4085265356 ecr 2179731905], length 0
5 packets captured
5 packets received by filter
0 packets dropped by kernel
=== 터널 쪽 ===
06:02:05.445308 IP 10.42.0.14.52916 > 10.42.1.29.5432: Flags [P.], seq 2469151212:2469151253, ack 2840346855, win 502, options [nop,nop,TS val 1040631333 ecr 678493794], length 41
06:02:05.445613 IP 10.42.1.29.5432 > 10.42.0.14.52916: Flags [P.], seq 1:343, ack 41, win 502, options [nop,nop,TS val 678500272 ecr 1040631333], length 342
06:02:05.446042 IP 10.42.0.14.52916 > 10.42.1.29.5432: Flags [.], ack 343, win 502, options [nop,nop,TS val 1040631334 ecr 678500272], length 0
06:02:08.968064 IP 10.42.0.14.52916 > 10.42.1.29.5432: Flags [P.], seq 41:82, ack 343, win 502, options [nop,nop,TS val 1040634856 ecr 678500272], length 41
06:02:08.968065 IP 10.42.0.14.52928 > 10.42.1.29.5432: Flags [P.], seq 617750272:617750278, ack 754926471, win 502, options [nop,nop,TS val 1040634856 ecr 678493795], length 6
5 packets captured
9 packets received by filter
0 packets dropped by kernel
