Sort by new | name | popular

Packet Captures

Showing 26 - 50 of 94

PIM_register_register-stop.cap 258 bytes

Submitted Sep 30, 2009 by pierky

Switch at 192.168.0.6 receives an IGMP request for the group 239.1.2.3, encapsulates the original IGMP packet in a PIM Register and sends it to the RP at 192.168.1.254. In packet #2 RP sends a Register-Stop to the switch.

Ethernet IP PIM

Packets: 2 Duration: n/a Downloads: 10948

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.

BOOTP Ethernet IP UDP

Packets: 12 Duration: 153s Downloads: 11468

VRRP_preempt.cap 1.2 KB

Submitted Sep 14, 2009

Initially R3 is the master, R2 is backup, and R1 is offline. R1 comes back online with a priority of 200, preempting R3 to become the master router.

Ethernet IP VRRP

Packets: 16 Duration: 14s Downloads: 11252

VRRP_failover.cap 2.4 KB

Submitted Sep 14, 2009

The master router (R1) goes offline. After the down interval passes (roughly 3 seconds), R3 takes over as the master router in packet #12. R2 also offers to take over but R3 wins because it has the higher IP address.

Ethernet IP VRRP

Packets: 32 Duration: 33s Downloads: 12027

UDLD.cap 3.3 KB

Submitted Sep 14, 2009

Unidirectional Link Detection (UDLD) is used to monitor the status of a link between a Catalyst 2960 and a Catalyst 3560. Note that echos are initially sent at very small intervals, gradually throttling back to the configured interval of 15 seconds.

Ethernet LLC UDLD

Packets: 29 Duration: 93s Downloads: 10268

telnet.cap 9.4 KB

Submitted Sep 14, 2009

Telnetting from one router to another. Note that all communication is visible in clear text.

Ethernet IP TCP Telnet

Packets: 74 Duration: 10s Downloads: 10027

TDP.cap 2.8 KB

Submitted Sep 14, 2009

P2 and PE2 exchange Tag Distribution Protocol hellos and form an adjacency over TCP port 711.

Ethernet IP TCP TDP UDP

Packets: 33 Duration: 47s Downloads: 6406

SSHv2.cap 11.4 KB

Submitted Sep 14, 2009

An SSH version 2 session between two routers. All communication is securely encrypted.

Ethernet IP SSH TCP

Packets: 90 Duration: 7s Downloads: 45443

SNMPv2c_get_requests.cap 894 bytes

Submitted Sep 14, 2009

SNMPv2c get requests are issued from a manager to an SNMP agent in order to monitor the bandwidth utilization of an interface.

Ethernet IP SNMP UDP

Packets: 8 Duration: n/a Downloads: 8082

RIPv2_subnet_down.cap 1.3 KB

Submitted Sep 14, 2009

RIPv2 routes are being flooded on the R1-R2 link. R2's connection to 192.168.2.0/24 goes down, and the route is advertised as unreachable (metric 16) in packet #7. Capture perspective from R1's 10.0.0.1 interface.

Ethernet IP RIP UDP

Packets: 10 Duration: 86s Downloads: 8549

RIPv2.cap 1.7 KB

Submitted Sep 14, 2009

A RIPv2 router periodically flooding its database. Capture perspective from R1's 10.0.0.1 interface.

Ethernet IP RIP UDP

Packets: 12 Duration: 141s Downloads: 10398

RIPv1_subnet_down.cap 1.0 KB

Submitted Sep 14, 2009

RIPv1 routes are being flooded on the R1-R2 link. R2's connection to 192.168.2.0/24 goes down, and the route is advertised as unreachable (metric 16) in packet #5. Capture perspective from R1's 10.0.1.1 interface.

Ethernet IP RIP UDP

Packets: 8 Duration: 58s Downloads: 6517

RIPv1.cap 876 bytes

Submitted Sep 14, 2009

A RIPv1 router periodically flooding its database. Capture perspective from R1's 10.0.1.1 interface.

Ethernet IP RIP UDP

Packets: 6 Duration: 65s Downloads: 7672

RADIUS.cap 775 bytes

Submitted Sep 14, 2009

A RADIUS authentication request is issued from a switch at 10.0.0.1 on behalf of an EAP client. The user authenticates via MD5 challenge with the username "John.McGuirk" and the password "S0cc3r".

Ethernet IP RADIUS UDP

Packets: 4 Duration: n/a Downloads: 15693

PIMv2_hellos.cap 528 bytes

Submitted Sep 14, 2009

Routers 1 and 2 exchange PIMv2 hello packets.

Ethernet IP PIM

Packets: 6 Duration: 63s Downloads: 9269

PIMv2_bootstrap.cap 712 bytes

Submitted Sep 14, 2009

Router 1 is the BSR and routers 2 and 3 are candidate RPs with the default priority of 0. R1 collects the RP advertisement unicasts from R2 and R3 and combines them in a bootstrap multicast to all PIM routers. Capture perspective is the R1-R3 link.

Ethernet IP PIM

Packets: 8 Duration: 184s Downloads: 7344

PIM-SM_join_prune.cap 3.8 KB

Submitted Sep 14, 2009

A host on R4's 172.16.20.0/24 subnet requests to join the 239.123.123.123 group. R4 sends a PIMv2 join message up to the RP (R1). Subsequent join messages are sent every 30 seconds, until R4 determines it no longer has any interested hosts and sends a prune request (packet #45). PIMv1 RP-Reachable messages for the group are also visible from R1.

Ethernet IGMP IP PIM

Packets: 47 Duration: 473s Downloads: 11551

PIM-DM_pruning.cap 10.2 KB

Submitted Sep 14, 2009

The multicast source at 172.16.40.10 begins sending traffic to the group 239.123.123.123, and PIM-DM floods the traffic down the tree. R4 has no group members, and prunes itself from the tree. R2 and R3 then realize they have no members, and each prunes itself from the tree. The capture shows R2 receiving the multicast traffic flooded from R1 and subsequently pruning itself every three minutes.

Ethernet IP PIM UDP

Packets: 38 Duration: 415s Downloads: 7052

path_MTU_discovery.cap 6.2 KB

Submitted Sep 14, 2009

Tracepath is used to determine the MTU of the path between hosts 192.168.0.2 and .1.2. Packet #6 contains an ICMP "fragmentation needed" message, indicating the MTU for that hop is 1400 bytes.

Ethernet ICMP IP UDP

Packets: 8 Duration: n/a Downloads: 13102

OSPF_with_MD5_auth.cap 4.6 KB

Submitted Sep 14, 2009

An OSPF adjacency is formed between two routers configured to use MD5 authentication.

Ethernet IP OSPF

Packets: 34 Duration: 63s Downloads: 7895

OSPF_type7_LSA.cap 3.6 KB

Submitted Sep 14, 2009

Area 10 is configured as a not-so-stubby area (NSSA). The capture records the adjacency formed between routers 2 and 3. The link state update in packet #11 includes several type 7 LSAs from R2. Capture perspective from R3's 10.0.10.1 interface.

Ethernet IP OSPF

Packets: 25 Duration: 32s Downloads: 9052

OSPF_LSA_types.cap 4.0 KB

Submitted Sep 14, 2009

Capture of adjacency formation between OSPF routers 4 and 5 in area 20. Packet #12 contains LSAs of types 1, 2, 3, 4, and 5.

Ethernet IP OSPF

Packets: 30 Duration: 63s Downloads: 12216

OSPF_broadcast_adjacencies.cap 8.4 KB

Submitted Sep 14, 2009

Three routers form OSPF adjacencies across a broadcast segment. All interface priorities are left default, so R3 (with the highest router ID) becomes the DR, and R2 (with the next-highest router ID) becomes the BDR. Capture perspective from R1.

Ethernet IP OSPF

Packets: 74 Duration: 95s Downloads: 9941

OSPFv3_with_AH.cap 10.7 KB

Submitted Sep 14, 2009

The adjacency between R1 and R2 in the 2001:db8:0:12::/64 subnet is configured with IPsec AH authentication. Note the inclusion of an IPsec AH header immediately following the IPv6 header of each OSPF packet.

Ethernet IPv6 OSPF

Packets: 61 Duration: 170s Downloads: 8642

OSPFv3_broadcast_adjacency.cap 5.4 KB

Submitted Sep 14, 2009

Routers 1 and 2 form an OSPFv3 adjacency across their common Ethernet link (2001:db8:0:12::/64).

Ethernet IPv6 OSPF

Packets: 38 Duration: 70s Downloads: 7490

Showing 26 - 50 of 94