A kakva je konfa mreže? Kažeš core switchevi, koliko još ima uređaja iza njih? Wireshark će uhvatiti taj problematični stream i koliko sam vidio moguće je lijepo vidjeti i jeli IGMP podešen, pa probaj snimiti par paketa s njime i pogledati. Ovako nekako bi trebalo izgledati to:
Citiraj:
Internet Protocol, Src Addr: xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx), Dst Addr: neka multicast adresa
Version: 4
Header length: 24 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: 32
Identification: 0x58dd (22749)
Flags: 0x00
0... = Reserved bit: Not set
.0.. = Don't fragment: Not set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 1
Protocol: IGMP (0x02)
Header checksum: 0x10f4 (correct)
Source: 192.168.xxx.xxx (192.168.xxx.xxx)
Destination: 239.255.255.250 (239.255.255.250)
Options: (4 bytes)
Router Alert: Every router examines packet
Internet Group Management Protocol
IGMP Version: 2
Type: Membership Report (0x16)
Max Response Time: 0,0 sec (0x00)
Header checksum: 0xfa04 (correct)
Multicast Address: 239.255.255.250 (239.255.255.250)
|