Topologie s CISCO routery

Výpis datagramu s volitelnou položkou volné explicitní směrování (loose source route). Odpověď zachycená na zdrojovém PC:

No.     Time        Source                Destination           Protocol Info
      4 3.359604    192.168.3.2           192.168.4.2           ICMP     Echo (ping) reply 

Frame 4 (60 bytes on wire, 60 bytes captured)
    Arrival Time: Jun  1, 2005 16:52:20.235741000
    Time delta from previous packet: 0.038969000 seconds
    Time since reference or first frame: 3.359604000 seconds
    Frame Number: 4
    Packet Length: 60 bytes
    Capture Length: 60 bytes
    Protocols in frame: eth:ip:icmp:data
Ethernet II, Src: 00:30:94:e5:bc:f0, Dst: 00:90:f5:2a:8b:82
    Destination: 00:90:f5:2a:8b:82 (Clevo_2a:8b:82)
    Source: 00:30:94:e5:bc:f0 (Cisco_e5:bc:f0)
    Type: IP (0x0800)
    Trailer: 0000
Internet Protocol, Src Addr: 192.168.3.2 (192.168.3.2), Dst Addr: 192.168.4.2 (192.168.4.2)
    Version: 4
    Header length: 28 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 44
    Identification: 0x87dc (34780)
    Flags: 0x00
        0... = Reserved bit: Not set
        .0.. = Don't fragment: Not set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 61
    Protocol: ICMP (0x01)
    Header checksum: 0x35d7 (correct)
    Source: 192.168.3.2 (192.168.3.2)
    Destination: 192.168.4.2 (192.168.4.2)
    Options: (8 bytes)
        Loose source route (7 bytes)
            Pointer: 8
            192.168.1.2
        EOL
Internet Control Message Protocol
    Type: 0 (Echo (ping) reply)
    Code: 0 
    Checksum: 0x73bf (correct)
    Identifier: 0xbe15
    Sequence number: 0x0000
    Data (8 bytes)

0000  c4 e7 9d 42 69 00 03 00                           ...Bi...