Packet Captures
3560_CDP.cap 1.2 KB
Submitted Sep 14, 2009
Cisco Discovery Protocol (CDP) advertisements from a Catalyst 3560. Note how much information is offered to a potential attacker.
| Packets: 3 | Duration: 120s | Downloads: 7091 |
3725_CDP.cap 390 bytes
Submitted Sep 14, 2009
Cisco Discovery Protocol (CDP) from FastEthernet0/0 of a Cisco 3725 router.
| Packets: 1 | Duration: n/a | Downloads: 6443 |
802.1D_spanning_tree.cap 1.1 KB
Submitted Sep 14, 2009
IEEE 802.1D Spanning Tree Protocol (STP) advertisements sent every two seconds.
| Packets: 14 | Duration: 26s | Downloads: 13646 |
802.1Q_tunneling.cap 5.0 KB
Submitted Jun 30, 2010
| Packets: 26 | Duration: 35s | Downloads: 21144 |
802.1X.cap 498 bytes
Submitted Sep 14, 2009
A wired client authenticates to its switch using 802.1x/EAP and MD5 challenge authentication.
| Packets: 7 | Duration: 19s | Downloads: 13780 |
802.1w_rapid_STP.cap 2.2 KB
Submitted Sep 14, 2009
Rapid Spanning Tree Protocol BPDUs are received from a Catalyst switch after connecting to a port not configured for PortFast. The port transitions through the blocking and learning states before issuing a topology change notification (packet #30) and transitioning to the forwarding state.
| Packets: 30 | Duration: 56s | Downloads: 11492 |
Auto-RP.cap 726 bytes
Submitted Sep 14, 2009
Routers 2 and 3 have been configured as candidate RPs, and multicast RP announcements to 239.0.1.39. Router 1 is the RP. R1 sees the candidate RP announcements from R2 and R3, and designates R3 the RP because it has a higher IP address (3.3.3.3). R1 multicasts the RP mapping to 224.0.1.40. The capture is from the R1-R2 link.
| Packets: 9 | Duration: 239s | Downloads: 6365 |
BGP_AS_set.cap 1.6 KB
Submitted Sep 14, 2009
Packet #15 includes a BGP update containing both an AS sequence and an AS set in its AS path attribute.
| Packets: 18 | Duration: 1s | Downloads: 7991 |
BGP_MD5.cap 1.7 KB
Submitted Nov 26, 2009
An EBGP with TCP MD5 authentication enabled
| Packets: 16 | Duration: 61s | Downloads: 10882 |
BGP_MP_NLRI.cap 2.9 KB
Submitted Jun 28, 2010
IPv6 routes are carried as a separate address family inside MP_REACH_NLRI attributes.
| Packets: 24 | Duration: 60s | Downloads: 16615 |
BGP_hard_reset.cap 3.2 KB
Submitted Sep 14, 2009
A hard reset (clear ip bgp) is performed on R1 for its adjacency with R2. Packet #7 shows R1 sending a packet with the TCP FIN flag set, indicating the connection is to be torn down. The TCP connection is then reestablished and UPDATEs are retransmitted.
| Packets: 32 | Duration: 208s | Downloads: 6656 |
BGP_notification.cap 764 bytes
Submitted Sep 14, 2009
R1 has been misconfigured to expect R2 to reside in AS 65100. R2 attempts to peer with R1 advertising itself correctly in AS 65200. R1 issues a NOTIFICATION in packet #5 citing a "bad peer AS" error and terminates the TCP connection.
| Packets: 9 | Duration: n/a | Downloads: 7022 |
BGP_soft_reset.cap 2.0 KB
Submitted Sep 14, 2009
R1 performs a soft bidirectional reset (clear ip bgp soft) on its adjacency with R2. The ROUTE-REFRESH message is visible in packet #7. Note that the TCP connection remains uninterrupted, and neither router views the reset as disruptive.
| Packets: 17 | Duration: 180s | Downloads: 6761 |
DECnet_Phone.pcap.cap 7.5 KB
Submitted Jan 13, 2010 by vmlemon
A DECnet Phone session, using the Linux DECnet stack and a clone/port of the OpenVMS eponymous tool.
| Packets: 139 | Duration: 100s | Downloads: 7143 |
DHCP.cap 5.8 KB
Submitted Sep 29, 2009 by pierky
R0 is the client and R1 is the DHCP server. Lease time is 1 minute.
| Packets: 12 | Duration: 153s | Downloads: 11468 |
DHCP_Inter_VLAN.cap 2.0 KB
Submitted Sep 30, 2009 by pierky
R1 is a router-on-a-stick. It receives a DHCP Discover on the trunk interface, it sets the "Relay agent IP address" to the sub-interface's IP address it received the packet on and, finally, it forwards it to the DHCP server. Capture perspective is R1-DHCP server link.
| Packets: 4 | Duration: n/a | Downloads: 11392 |
DHCP_MessageType 10,11,12 and 13.cap 1.9 KB
Submitted Jan 31, 2011 by Jawahar
Access Concentrator/router queries lease for particular IP addresses using message type as "DHCP LEASE QUERY" and gets response as DHCP LEASE ACTIVE,LEASE UNASSIGNED and LEASE UNKNOWN.
Access Concenttrator/Router IP=10.10.39.14
DHCP server IP=10.10.35.33
| Packets: 6 | Duration: 13s | Downloads: 13490 |
DTP.cap 934 bytes
Submitted Sep 14, 2009
Dynamic Trunking Protocol (DTP) emanated from a Catalyst 3560 every 60 seconds, both with and without ISL encapsulation.
| Packets: 10 | Duration: 120s | Downloads: 8692 |
EBGP_adjacency.cap 2.7 KB
Submitted Sep 14, 2009
The external BGP adjacency between routers 1 and 2 is brought online and routes are exchanged. Keepalives are then exchanged every 60 seconds. Note that the IP TTL (normally 1) has been increased to 2 with ebgp-multihop to facilitate communication between the routers' loopback interfaces.
| Packets: 24 | Duration: 182s | Downloads: 8162 |
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.
| Packets: 53 | Duration: 104s | Downloads: 10287 |
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.
| Packets: 15 | Duration: 43s | Downloads: 7669 |
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.
| Packets: 21 | Duration: 23s | Downloads: 6065 |
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.
| Packets: 15 | Duration: 18s | Downloads: 8055 |
EIGRPv2_adjacency.cap 4.1 KB
Submitted Sep 14, 2009
Routers 1 and 2 form an EIGRPv2 adjacency and exchange IPv6 routes.
| Packets: 31 | Duration: 52s | Downloads: 8046 |
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.
| Packets: 49 | Duration: 65s | Downloads: 6243 |