ISL:
ETHER: ----- Ethernet Header -----
ETHER:
ETHER: Destination = Multicast 01005E0A0A0A
!--- Destination is the GDA MAC. ETHER: Source = Station Cisco176DCCA !--- Sourced by
the PC connected in 3/1. ETHER: Ethertype = 0800 (IP) ETHER: IP: ----- IP Header ----
- IP: IP: Version = 4, header length = 20 bytes IP: Type of service = C0 IP: 110.
.... = internetwork control IP: ...0 .... = normal delay IP: .... 0... = normal
throughput IP: .... .0.. = normal reliability IP: Total length = 28 bytes IP:
Identification = 0 IP: Flags = 0X IP: .0.. .... = may fragment IP: ..0. .... = last
fragment IP: Fragment offset = 0 bytes IP: Time to live = 1 seconds/hops IP: Protocol
= 2 (IGMP) IP: Header checksum = CC09 (correct) IP: Source address = [10.1.1.2] IP:
Destination address = [224.10.10.10] IP: No options IP: IGMP: ----- IGMP header -----
IGMP: IGMP: Version = 1 IGMP: Type = 6 (Ver2 Membership Report) IGMP: Unused = 0x00
IGMP: Checksum = FFEA (correct) IGMP: Group Address = [224.10.10.10] IGMP:
Frame 3
Frame 3 is the CGMP frame sent by the router to the switch to tell the switch to add a static entry
for 01-00-5e-0a-0a-0a.
ISL: ----- ISL Protocol Packet -----
ISL:
ISL: Destination Address = 01000C0000
ISL: Type = 0 (Ethernet)
ISL: User = 0 (Normal)
ISL: Source Address = 8C958B7B1000
ISL: Length = 76
ISL: Constant value = 0xAAAA03
ISL: Vendor ID = 0x8C958B
ISL: Virtual LAN ID (VLAN) = 2
ISL: Bridge Protocol Data Unit (BPDU) = 0
ISL: Port Index = 193
ISL: Reserved
ISL:
ETHER: ----- Ethernet Header -----
ETHER:
ETHER: Destination = Multicast 01000CDDDDDD
ETHER: Source = Station Cisco11411E1
ETHER: 802.3 length = 24
ETHER:
LLC: ----- LLC Header -----
LLC:
LLC: DSAP Address = AA, DSAP IG Bit = 00 (Individual Address)
LLC: SSAP Address = AA, SSAP CR Bit = 00 (Command)
LLC: Unnumbered frame: UI
LLC:
SNAP: ----- SNAP Header -----
SNAP:
SNAP: Vendor ID = Cisco1
SNAP: Type = 2001 (CGMP)
SNAP:
CGMP: ----- CGMP -----
CGMP:
CGMP: Version = 16
CGMP: Type = 0 (Join)
CGMP: Reserved
CGMP: Count = 1
CGMP:
CGMP: Group Destination Address and Unicast Source Address
CGMP: