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Packet Captures

Showing 51 - 75 of 138

LDP_Ethernet_FrameRelay.pcap.cap 2.1 KB

Submitted Dec 5, 2009 by pierky

LDP with pseudowire FEC elements (Ethernet and Frame-Relay DLCI-to-DLCI)

Ethernet IP LDP MPLS TCP UDP

Packets: 14 Duration: 7s Downloads: 6587

BGP_MD5.cap 1.7 KB

Submitted Nov 26, 2009

An EBGP with TCP MD5 authentication enabled

BGP Ethernet IP TCP

Packets: 16 Duration: 61s Downloads: 7326

PAGP.cap 2.5 KB

Submitted Nov 15, 2009

Ethernet LLC PAGP

Packets: 25 Duration: 95s Downloads: 5525

LACP.cap 2.8 KB

Submitted Nov 15, 2009

Ethernet LACP

Packets: 20 Duration: 112s Downloads: 8999

BGP_redist.cap 378 bytes

Submitted Oct 28, 2009 by colinbsd

The OSPF metric is preserved and propagated within the MPLS cloud by the MP-BGP MED attribute.

BGP HDLC IP MPLS TCP

Packets: 2 Duration: n/a Downloads: 7056

OSPF_Down-Bit.cap 8.9 KB

Submitted Oct 27, 2009 by colinbsd

LSA Update with down bit set. Router R5 56.0.0.5 PE is receiving an update from the MPLS VPN, which is advertised to CE 56.0.0.6 ospf routing table. In order for for the packet(LSA) not to be re-advertised back into the MPLS cloud through another PE(2) router, PE sets the Down-bit to 1. filter: ospf.v2.options.dn == 1

CDP HDLC IP OSPF SLARP

Packets: 98 Duration: 203s Downloads: 6316

PPP_negotiation.cap 4.6 KB

Submitted Oct 22, 2009

CDP CDPCP CHAP ICMP IP IPCP LCP PPP

Packets: 63 Duration: 67s Downloads: 7287

EoMPLS.cap 7.0 KB

Submitted Oct 12, 2009 by pierky

Routers at 1.1.2.1 and 1.1.2.2 are PEs in a MPLS cloud. LDP starts at packet 8 and they build up a pseudo-wire VC (last FEC in packets 11 and 13). At packet 15 we already have STP running between CE1 and CE2 (two routers with ESW), encapsulated in 2 MPLS headers. All the ethernet stuff follows: CDP, ARP, ICMP between two hosts on the same subnet.

Ethernet IP LOOP MPLS TCP UDP

Packets: 56 Duration: 32s Downloads: 7264

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.

BOOTP Ethernet IP UDP

Packets: 4 Duration: n/a Downloads: 6735

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: 6652

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: 8598

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: 6556

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: 8200

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: 6096

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: 6659

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: 4186

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: 6123

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: 4965

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: 5180

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: 5844

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: 4155

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: 4720

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: 8452

PPP_TCP_compression.cap 1.5 KB

Submitted Sep 14, 2009

A telnet session is established to 191.1.13.3 across a PPP link performing TCP header compression. The user at 191.1.13.1 logs in with the password "cisco" and terminates the connection.

IP LCP PPP TCP

Packets: 43 Duration: 3s Downloads: 4121

PPP.cap 3.6 KB

Submitted Sep 14, 2009

ICMP across a PPP serial link.

CDP ICMP IP LCP PPP

Packets: 50 Duration: 83s Downloads: 4988

Showing 51 - 75 of 138