Tuesday, May 31, 2016

IGMP membership query

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
IP Version 4, Header length 24 bytes, (6 32 bit words)

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
0xc0 = 1000 0000 Type of service  ECN capable Not ECT
0x0020 Total length  = 32 bytes
0X0000 IPID  

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
0X40 = 0100 0000 FLAGS = DO NOT FRAGMENT
0X00 = NO FRAGMENT OFFSET
0X01 = TTL OF 1

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
0X426D HEADER CHECKSUM - DID NOT VALIDATE
0Xc0a80101 SRC IP 192.168.1.1
0xe0000001 DEST IP 224.0.0.1 MULTICAST

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
0X9404 = 1100 0100 IP OPTION - ROUTER ALERT If the Router Alert option is not set and should be set with protocol using the Router Alert, (RSVP or IGMPv2), will be adversely affected since the protocol relies on the use of the Router Alert option to more closely scrutinize the packet.

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
0X11 MEMBERSHIP QUERY
0X64 MAX RESPONSE TIME = 100 DECIMAL TENTHS OF A SECOND 10SEC
0XEE9B HEADER CHECKSUM - CORRECT

46c00020000040000102426dc0a80101e0000001940400001164ee9b00000000
MULTICAST ADDRESS


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