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Packet Captures

Showing 51 - 75 of 123

TACACS+_encrypted.cap 2.8 KB

Submitted Sep 28, 2010

TACACS+ authentication and authorization requests as made by a Cisco IOS router upon a user logging in via Telnet.

Ethernet IP TACACS+ TCP

Packets: 34 Duration: 7s Downloads: 12094

ICMP_over_L2TPv3_Pseudowire.pcap.cap 5.3 KB

Submitted Sep 4, 2010 by onefst250r

ICMP pings from a CE to a second CE via a L2TPv3 pseudowire.

Ethernet IP L2TP LOOP OSPF

Packets: 38 Duration: 30s Downloads: 11464

802.1Q_tunneling.cap 5.0 KB

Submitted Jun 30, 2010

CDP Ethernet IP LLC VLAN

Packets: 26 Duration: 35s Downloads: 19470

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.

BGP Ethernet IP IPv6 TCP

Packets: 24 Duration: 60s Downloads: 15204

TCP_SACK.cap 27.5 KB

Submitted Jun 16, 2010

A TCP SACK option is included in packets #31, #33, #35, and #37. The missing segment is retransmitted in packet #38.

Ethernet HTTP IP TCP

Packets: 39 Duration: n/a Downloads: 24559

4-byte_AS_numbers_Mixed_Scenario.cap 414 bytes

Submitted Apr 30, 2010 by pierky

Router "B" (AS 2) at 172.16.3.2 does not support 4-byte AS numbers, while router "A" (AS 10.1 / 655361) at 172.16.3.1 does.

Router "A" receives an UPDATE for the 40.0.0.0/8 subnet from an external router ("D") in the AS 40.1 / 2621441 (not shown), and it forwards it to "B" (pkt n. 2): AS_PATH contains "23456 23456" (the first stands for AS 10.1, the second for the originating AS 40.1), but NEW_AS_PATH contains the real 4-byte AS numbers.

At pkt n. 3 "B" receives the same subnet directly from "D" and sends it to "A", including the original NEW_AS_PATH attribute previously appended by "D".

BGP HDLC IP TCP

Packets: 4 Duration: 60s Downloads: 8794

4-byte_AS_numbers_Full_Support.cap 1.2 KB

Submitted Apr 30, 2010 by pierky

Router at 172.16.1.2 (hostname "D", AS 40.1 / 2621441) clears a previous established peering with 172.16.1.1 (hostname "A", AS 10.1 / 655361); They both support 32-bit ASN.

While opening the new session, they negotiate the "Four-octet AS Number Capability" (pkts n. 2 and 3).

Then, both "A" and "D" send some UPDATEs containing 4-octect encoded AS_PATH attributes (pkts n. 6 and 9). Please note: WireShark may show wrong paths unless you force 4-byte encoding in the Preferences / Protocols / BGP options.

BGP HDLC IP TCP

Packets: 9 Duration: 56s Downloads: 8121

rpvstp-access.pcap.cap 3.7 KB

Submitted Dec 16, 2009 by einval

Rapid per-VLAN spanning tree capture of an access port (without portfast), configured in VLAN 5.

DNS Ethernet IP LLC LOOP STP UDP

Packets: 49 Duration: 77s Downloads: 8358

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: 8847

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: 9970

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: 9247

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: 8745

PPP_negotiation.cap 4.6 KB

Submitted Oct 22, 2009

CDP CDPCP CHAP ICMP IP IPCP LCP PPP

Packets: 63 Duration: 67s Downloads: 9985

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: 10333

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: 10002

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: 9790

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: 9945

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: 10993

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: 9092

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: 5810

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: 9313

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: 7138

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: 7612

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: 8938

Showing 51 - 75 of 123