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Packet Captures

Showing 101 - 125 of 138

ISIS_level1_adjacency.cap 27.4 KB

Submitted Sep 14, 2009

Routers 2 and 3 form an IS-IS level 2 adjacency.

Ethernet ISIS LLC

Packets: 22 Duration: 58s Downloads: 4787

ISIS_external_lsp.cap 17.0 KB

Submitted Sep 14, 2009

R2 floods the external routes redistributed from RIP into area 10. Packet #9 includes the IP external reachability TLV. Capture perspective from R3's 10.0.10.1 interface.

Ethernet ISIS LLC

Packets: 15 Duration: 23s Downloads: 4216

ISAKMP_sa_setup.cap 2.0 KB

Submitted Sep 14, 2009

An ISAKMP session is established prior to setting up an IPsec tunnel. Phase one occurs in main mode, and phase two occurs in quick mode.

Ethernet IP ISAKMP UDP

Packets: 9 Duration: n/a Downloads: 5861

IP_in_IP.cap 1.5 KB

Submitted Sep 14, 2009

Direct IP-in-IP tunnel encapsulation (configured in Cisco IOS with tunnel mode ipip).

Ethernet ICMP IP

Packets: 10 Duration: n/a Downloads: 8306

ipv6_neighbor_spoofing.cap 6.2 KB

Submitted Sep 14, 2009

IPv6 neighbor spoofing on the local link using a forged ICMPv6 neighbor advertisement.

Ethernet ICMPv6 IPv6

Packets: 49 Duration: 27s Downloads: 5396

IPv6_NDP.cap 2.1 KB

Submitted Sep 14, 2009

Neighbor Discovery Protocol (NDP) uses ICMPv6 to perform duplicate address detection and address resolution. Also includes multicast listener reports.

Ethernet ICMPv6 IPv6

Packets: 20 Duration: 41s Downloads: 9082

IPv6_in_IP.cap 1.5 KB

Submitted Sep 14, 2009

ICMPv6 echos across an IPv6-in-IP tunnel.

Ethernet ICMPv6 IP IPv6

Packets: 10 Duration: n/a Downloads: 6898

IPsec_ESP-AH_tunnel_mode.cap 2.1 KB

Submitted Sep 14, 2009

Encrypted ICMP across an IPsec tunnel. AH and ESP headers are present.

AH ESP Ethernet IP

Packets: 10 Duration: n/a Downloads: 7560

IGMPv2_query_and_report.cap 438 bytes

Submitted Sep 14, 2009

R1 issues IGMPv2 general membership queries to the 172.16.40.0/24 segment every 60 seconds. A host replies to each query reporting it belongs to the multicast group 239.255.255.250.

Ethernet IGMP IP

Packets: 6 Duration: 126s Downloads: 5407

ICMP_across_frame_relay.cap 1.2 KB

Submitted Sep 14, 2009

A Cisco 3725 pinging its neighbor across a point-to-point frame relay connection.

Frame Relay ICMP IP

Packets: 10 Duration: n/a Downloads: 4322

ICMP_across_dot1q.cap 1.7 KB

Submitted Sep 14, 2009

A ping issued from 192.168.123.2 to 192.168.123.1 is encapsulated with an IEEE 802.1Q header, placing it in VLAN 123.

ARP Ethernet ICMP IP VLAN

Packets: 15 Duration: 35s Downloads: 7242

ICMPv6_echos.cap 1.3 KB

Submitted Sep 14, 2009

Five ICMPv6 echo requests and their subsequent replies between routers 1 and 2.

Ethernet ICMPv6 IPv6

Packets: 10 Duration: n/a Downloads: 4524

IBGP_adjacency.cap 2.3 KB

Submitted Sep 14, 2009

Routers 3 and 4 form an internal BGP relationship. This is evidenced by the OPEN messages in packets #4 and #5, which show both routers belong to the same AS (65300). Also note that IBGP packets are not subject to a limited TTL as are EBGP packets.

BGP Ethernet IP TCP

Packets: 17 Duration: 63s Downloads: 4872

HSRP_failover.cap 3.0 KB

Submitted Sep 14, 2009

R1 is the active router, R3 is the standby, and R2 is passive. R1 goes offline and R3 takes over as active after ten seconds. R2 is then promoted to the standby state.

Ethernet HSRP IP UDP

Packets: 39 Duration: 47s Downloads: 4791

HSRP_election.cap 3.7 KB

Submitted Sep 14, 2009

The Ethernet link shared by routers 1, 2, and 3 comes online. R1 wins the HSRP election because it has a priority of 200 (versus the default of 100 held by the other two routers). R3 becomes the standby router.

Ethernet HSRP IP UDP

Packets: 49 Duration: 57s Downloads: 4446

HSRP_coup.cap 3.9 KB

Submitted Sep 14, 2009

Initially only routers 3 (active) and 2 (standby) are online. R1 comes online with a priority higher than R3's. R1 takes over as the active router (the coup occurs in packet #22) almost immediately. R2 is bumped down to passive and R3 becomes the standby router.

Ethernet HSRP IP UDP

Packets: 51 Duration: 49s Downloads: 3998

HDLC.cap 3.4 KB

Submitted Sep 14, 2009

ICMP across an HDLC serial link.

CDP HDLC ICMP IP SLARP

Packets: 38 Duration: 111s Downloads: 4330

GRE.cap 1.5 KB

Submitted Sep 14, 2009

ICMP is encapsulated into a Generic Routing Encapsulation (GRE) tunnel.

Ethernet GRE IP

Packets: 10 Duration: n/a Downloads: 10881

GLBP_election.cap 8.4 KB

Submitted Sep 14, 2009

Routers 1, 2, and 3 participate in a GLBP election. R1 becomes the AVG due to having the highest priority (200), and R3 becomes the standby GLBP. All three routers become AVFs.

Ethernet GLBP IP UDP

Packets: 80 Duration: 68s Downloads: 3955

Ethernet_keepalives.cap 1012 bytes

Submitted Sep 14, 2009

Loopback keepalives transmitted by an Ethernet interface.

Ethernet LOOP

Packets: 13 Duration: 120s Downloads: 3565

EIGRP_subnet_up.cap 1.3 KB

Submitted Sep 14, 2009

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.

EIGRP Ethernet IP

Packets: 15 Duration: 18s Downloads: 5282

EIGRP_subnet_down.cap 1.8 KB

Submitted Sep 14, 2009

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.

EIGRP Ethernet IP

Packets: 21 Duration: 23s Downloads: 3923

EIGRP_goodbye.cap 1.3 KB

Submitted Sep 14, 2009

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.

EIGRP Ethernet IP

Packets: 15 Duration: 43s Downloads: 4671

EIGRP_adjacency.cap 5.1 KB

Submitted Sep 14, 2009

Formation of an EIGRP adjacency between routers R1 and R2. Capture point is R1's 10.0.0.1 interface.

EIGRP Ethernet IP

Packets: 53 Duration: 104s Downloads: 6879

EIGRPv2_subnet_transition.cap 5.3 KB

Submitted Sep 14, 2009

R4's 2001:db8:0:400::/64 subnet goes down, then comes back up roughly thirty seconds later. Capture perspective from R1's 2001:db8:0:12::1 interface.

EIGRP Ethernet IPv6

Packets: 49 Duration: 65s Downloads: 4050

Showing 101 - 125 of 138