Ping from Host-1 to Host-2

        @startuml
        participant "Host1\n.11" as h1
        control 172.16.1.X as n1
        participant "Switch1\n.2" as s1
        control 182.100.1.X as n2
        participant "Router1\n.1" as r1
        participant Internet 
        participant "Router2\n.1" as r2
        control 192.100.1.X as n3
        participant "Switch2\n.2" as s2
        control 200.100.1.X as n4
        participant "Host2\n.3" as h2
        
        note over h1
        Send Pkt to Host2
        I have MAC of Host2?No
        Send ARP pkt
        end note
        h1->s1: ARP Probe
        s1->r1:ARP Req\n |srcIP=host1|dstIP=Host2|\nsrcMAC=self|dstMAC=fff|
        
        note over r1
        Send self MAC
        end note
        
        r1->s1:ARP Res
        s1->h1:ARP Res
        
        h1->s1: Ping Req\n|srcMac=h1|dstMac=r1\n|src|dst|SrcPort|\nDstPort|ICMP Hello|
        s1->r1: Ping Req\n|srcMac=h1|dstMac=r1\n|src|dst|SrcPort|\nDstPort|ICMP Hello|
        
        note over r1
        Layer-2
        if(dstMAC=MyMAC)
          //Process it
          Change MAC to 
          immediately connected
          router
        end note
        
        note over r1
        Layer-3
        if(My Pkt)
          consume
        else
          Change chksum
          TTL -= 1
          |src=172.16.1.11|dst=200.100.1.5|
          - Send on outgoing
          intf from routing
          table
        end note
        
        r1->r2: Ping Req\n|srcMac=h1|dstMac=r1\n|src|dst|SrcPort|\nDstPort|ICMP Hello|
        
        legend
        = Routing Table(R1)
        |N/WDestination | N/W Mask |Next Hop|Interface|Metric/Cost |Protocol|
        |0.0.0.0|0.0.0.0 |172.16.1.1 |1 |46 |DEFAULT ROUTE \nSend Pkt to G/W If no specific Next Hop is Listed in Table.|
        |255.255.255.255 |255.255.255.255 |172.16.2.1 |1 |296 |Direct |BROADCAST|
        |127.0.0.1 |255.255.255.255 |127.0.0.1 |127.0.0.0.1 |4531 |Local |LOOPBACK|
        |222.16.4.0 |255.255.255.0 |172.16.1.1 |0 |30 |STATIC |This is Manually Configured. Reach 222.16.4.X via default G/W|
        |200.100.1.0 |255.255.255.0 |172.16.1.2 |1 |30 |OSPF |
        |192.100.1.0 |255.255.255.0 |172.16.1.2 |1 |92 |OSPF |
        end legend
        
        @enduml