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Category: IP

IGMPv2 packet capture

The capture displays an IGMPv2 multicast communication. The IP host with the IP address is wishing to join multicast group  sending the Memership Report IGMP message (1st and 2nd packet). After sucesfull joining, it is leaving the group after a while  with IGMP Leave Group message (3td packet), which follows by two Membership Queries issued by the default gateway with IP on the multicast group address ( checking for the actual group membership on the LAN for the multicast group.

Number of packets: 5

BGPv4 – open and keepalive messages – moving from connect to open state – eBGP peers


Routers R1 nad R2 are connected through the serial HDLC line. R1 router is a BGP speaker running AS 200, the R2 router is an AS100 BGP speaker. Both routers are configured with correct BGP neighbor commands to form an eBGP peering. The capture is displaying the moment when we activate serial interconnecting interface (no shutdown)  of the R2 router.