Packet Captures

EIGRP_subnet_up.cap (1.3 KB)

Submitted Sep 14, 2009 | Download | View Online

Packets: 15

Duration: 18s

Downloads: 2571

R4's 192.168.4.0/24 subnet is brought online. R1 receives updates from both R2 and R3 (only R2's update is shown in the capture). The poison-reverse in packet #9 informs R2 not to use R1 as a path to 192.168.4.0/24. The capture perspective is from R1's 10.0.0.1 interface.

Categories: Cisco-proprietary, Routing Protocols
Protocols: EIGRP, Ethernet, IP

EIGRP_subnet_down.cap (1.8 KB)

Submitted Sep 14, 2009 | Download | View Online

Packets: 21

Duration: 23s

Downloads: 2077

R4's interface to 192.168.4.0/24 goes down and the route is advertised as unreachable. Queries are issued by all routers to find a new path to the subnet but none exists, and the route is removed from the topology. Capture perspective is from R1's 10.0.0.1 interface.

Categories: Cisco-proprietary, Routing Protocols
Protocols: EIGRP, Ethernet, IP

EIGRP_goodbye.cap (1.3 KB)

Submitted Sep 14, 2009 | Download | View Online

Packets: 15

Duration: 43s

Downloads: 2339

R2 designates its interface facing R1 as passive. The final hello message from R2 (packet #9) has all its K values set to 255, designating the message as a "goodbye." Capture perspective is from R1's 10.0.0.1 interface.