Výpis paketu s volbou IP Router Alert Option:
No. Time Source Destination Protocol Info 504 415.939583 192.168.0.2 224.0.0.22 IGMP V3 Membership Report Frame 504 (54 bytes on wire, 54 bytes captured) Arrival Time: May 26, 2005 23:50:48.450069000 Time delta from previous packet: 0.000692000 seconds Time since reference or first frame: 415.939583000 seconds Frame Number: 504 Packet Length: 54 bytes Capture Length: 54 bytes Protocols in frame: eth:ip:igmp Ethernet II, Src: 00:90:f5:2a:8b:82, Dst: 01:00:5e:00:00:16 Destination: 01:00:5e:00:00:16 (01:00:5e:00:00:16) Source: 00:90:f5:2a:8b:82 (Clevo_2a:8b:82) Type: IP (0x0800) Internet Protocol, Src Addr: 192.168.0.2 (192.168.0.2), Dst Addr: 224.0.0.22 (224.0.0.22) Version: 4 Header length: 24 bytes Differentiated Services Field: 0xc0 (DSCP 0x30: Class Selector 6; ECN: 0x00) 1100 00.. = Differentiated Services Codepoint: Class Selector 6 (0x30) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 40 Identification: 0x0000 (0) Flags: 0x04 (Don't Fragment) 0... = Reserved bit: Not set .1.. = Don't fragment: Set ..0. = More fragments: Not set Fragment offset: 0 Time to live: 1 Protocol: IGMP (0x02) Header checksum: 0x434f (correct) Source: 192.168.0.2 (192.168.0.2) Destination: 224.0.0.22 (224.0.0.22) Options: (4 bytes) Router Alert: Every router examines packet Internet Group Management Protocol IGMP Version: 3 Type: Membership Report (0x22) Header checksum: 0xf9f4 (correct) Num Group Records: 1 Group Record : 224.0.0.9 Change To Exclude Mode Record Type: Change To Exclude Mode (4) Aux Data Len: 0 Num Src: 0 Multicast Address: 224.0.0.9 (224.0.0.9)