Execute the following command
ping -I pon1_128 1.2.3.4
Meanwhile tcpdump on the host machine on pon1_0.
sudo tcpdump -nei pon1_0
which will output
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on pon1_0, link-type EN10MB (Ethernet), capture size 262144 bytes 13:53:44.328260 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28 13:53:45.322475 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28 13:53:46.322725 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28 13:53:47.325610 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28 13:53:48.322729 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28 13:53:49.322517 06:0c:49:94:35:7e > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 50: vlan 1000, p 0, ethertype 802.1Q, vlan 128, p 0, ethertype ARP, Request who-has 1.2.3.4 tell 10.1.11.63, length 28
Ping completes successfully