[baseline-router] 2026-09-13T14:23:01.555180+00:00 R2> ip link set eth0 up; ip link set eth1 up; sysctl -w net.ipv4.ip_forward=1; ip -4 addr; ip route; sysctl net.ipv4.ip_forward ip link set eth0 up; ip link set eth1 up; sysctl -w net.ipv4.ip_forward=1; i p -4 addr; ip route; sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 1 1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1000 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 18: eth0: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 inet 192.168.10.1/24 scope global eth0 valid_lft forever preferred_lft forever 19: eth1: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 inet 192.168.20.1/24 scope global eth1 valid_lft forever preferred_lft forever 192.168.10.0/24 dev eth0 scope link src 192.168.10.1 192.168.20.0/24 dev eth1 scope link src 192.168.20.1 net.ipv4.ip_forward = 1 / # / # [baseline-pc2] 2026-09-13T14:23:03.551256+00:00 PC1> ping 192.168.20.10 -c 3 -i 500 -w 1000 ping 192.168.20.10 -c 3 -i 500 -w 1000 84 bytes from 192.168.20.10 icmp_seq=1 ttl=63 time=1.160 ms 84 bytes from 192.168.20.10 icmp_seq=2 ttl=63 time=1.035 ms 84 bytes from 192.168.20.10 icmp_seq=3 ttl=63 time=1.174 ms VPCS> [baseline-pc3] 2026-09-13T14:23:05.548097+00:00 PC1> ping 192.168.10.20 -c 3 -i 500 -w 1000 ping 192.168.10.20 -c 3 -i 500 -w 1000 84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=0.897 ms 84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=0.786 ms 84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=0.894 ms VPCS> [fault-forwarding-off] 2026-09-13T14:23:06.007470+00:00 R2> sysctl -w net.ipv4.ip_forward=0; sysctl net.ipv4.ip_forward; ip link show eth0; ip link show eth1 sysctl -w net.ipv4.ip_forward=0; sysctl net.ipv4.ip_forward; ip link show et h0; ip link show eth1 net.ipv4.ip_forward = 0 net.ipv4.ip_forward = 0 18: eth0: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 link/ether 02:42:d4:39:68:00 brd ff:ff:ff:ff:ff:ff 19: eth1: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 link/ether 02:42:d4:39:68:01 brd ff:ff:ff:ff:ff:ff / # / # [clear-arp] 2026-09-13T14:23:06.463445+00:00 PC1> clear arp clear arp VPCS> [cache-before] 2026-09-13T14:23:06.921285+00:00 PC1> show arp show arp arp table is empty VPCS> [fault-pc2] 2026-09-13T14:23:12.347162+00:00 PC1> ping 192.168.20.10 -c 3 -i 500 -w 1000 ping 192.168.20.10 -c 3 -i 500 -w 1000 192.168.20.10 icmp_seq=1 timeout 192.168.20.10 icmp_seq=2 timeout 192.168.20.10 icmp_seq=3 timeout VPCS> [cache-after-fault] 2026-09-13T14:23:12.804459+00:00 PC1> show arp show arp 02:42:d4:39:68:00 192.168.10.1 expires in 115 seconds VPCS> [recovery-router] 2026-09-13T14:23:13.266913+00:00 R2> ip link set eth0 up; ip link set eth1 up; sysctl -w net.ipv4.ip_forward=1; ip -4 addr; ip route; sysctl net.ipv4.ip_forward ip link set eth0 up; ip link set eth1 up; sysctl -w net.ipv4.ip_forward=1; i p -4 addr; ip route; sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 1 1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1000 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 18: eth0: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 inet 192.168.10.1/24 scope global eth0 valid_lft forever preferred_lft forever 19: eth1: mtu 1500 qdisc fq_codel state UNKNOWN qlen 1000 inet 192.168.20.1/24 scope global eth1 valid_lft forever preferred_lft forever 192.168.10.0/24 dev eth0 scope link src 192.168.10.1 192.168.20.0/24 dev eth1 scope link src 192.168.20.1 net.ipv4.ip_forward = 1 / # / # [recovery-pc2] 2026-09-13T14:23:15.101912+00:00 PC1> ping 192.168.20.10 -c 3 -i 500 -w 1000 ping 192.168.20.10 -c 3 -i 500 -w 1000 84 bytes from 192.168.20.10 icmp_seq=1 ttl=63 time=1.325 ms 84 bytes from 192.168.20.10 icmp_seq=2 ttl=63 time=1.408 ms 84 bytes from 192.168.20.10 icmp_seq=3 ttl=63 time=1.468 ms VPCS> [recovery-pc3] 2026-09-13T14:23:17.097019+00:00 PC1> ping 192.168.10.20 -c 3 -i 500 -w 1000 ping 192.168.10.20 -c 3 -i 500 -w 1000 84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=0.652 ms 84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=1.196 ms 84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=1.020 ms VPCS>