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Packet Captures

Showing 101 - 125 of 149

OSPFv3_multipoint_adjacencies.cap 11.5 KB

Submitted Sep 14, 2009

The frame relay link connecting routers 1, 2, and 3 has been configured as a point-to-multipoint network with broadcast capability. Router 3 forms OSPFv3 adjacencies with routers 1 and 2, but no DR or BDR is elected.

Frame Relay IPv6 OSPF

Packets: 73 Duration: 35s Downloads: 4279

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: 4797

NHRP_registration.cap 648 bytes

Submitted Sep 14, 2009

R2 registers a multipoint GRE tunnel with R1. Capture perspective from the R1-R5 link.

Ethernet GRE IP NHRP

Packets: 4 Duration: n/a Downloads: 4680

mtrace.cap 238 bytes

Submitted Sep 14, 2009

mtrace 172.16.40.1 172.16.20.1 is issued on R1 to trace the RPF path from R4's 172.16.20.0/24 subnet to R1's 172.16.40.0/24 subnet. The capture is taken on the R1-R3 link.

Ethernet IGMP IP

Packets: 2 Duration: n/a Downloads: 4128

MSDP.cap 4.1 KB

Submitted Sep 14, 2009

R2 and R3 become MSDP peers and exchange keepalives. A multicast source 172.16.40.10 begins sending traffic to group 239.123.123.123, and R2 begins sending periodic source active messages to R3. Capture perspective is the R2-R3 link.

Ethernet IP MSDP TCP

Packets: 35 Duration: 391s Downloads: 4291

mrinfo_query.cap 182 bytes

Submitted Sep 14, 2009

mrinfo 2.2.2.2 is issued on R1. DVMRPv3 is used to query R2 for its multicast interfaces.

DVMRP Ethernet IGMP IP

Packets: 2 Duration: n/a Downloads: 3755

MPLS_encapsulation.cap 1.3 KB

Submitted Sep 14, 2009

Capture taken from the PE1-P1 link. ICMP traffic between CE1 and CE2 is encapsulated outbound with MPLS label 18. Note that returning traffic is not labeled, due to penultimate hop popping (PHP).

Ethernet ICMP IP MPLS

Packets: 10 Duration: n/a Downloads: 7570

mGRE_ICMP.cap 3.7 KB

Submitted Sep 14, 2009

R2 begins sending ICMP traffic to R4, but it currently only has a GRE tunnel open to R1. The first two ICMP requests (packets #1 and #4) are routed through R1 while R2 sends an NHRP request to R1 for R4's spoke address. Once a GRE tunnel is dynamically built between spoke routers R2 and R4, R2 begins routing the ICMP traffic directly to R4. Capture perspective from the R2-R5 link.

Ethernet GRE IP NHRP

Packets: 24 Duration: 10s Downloads: 6514

LDP_adjacency.cap 5.7 KB

Submitted Sep 14, 2009

PE1 and P1 multicast LDP hellos to 224.0.0.2 on UDP port 646. They then establish an adjacency on TCP port 646 and exchange labels.

Ethernet IP LDP TCP UDP

Packets: 61 Duration: 108s Downloads: 6189

ISIS_p2p_adjacency.cap 21.7 KB

Submitted Sep 14, 2009

Routers 1 and 2 form a L1/L2 adjacency over a point-to-point serial link. Note that both levels of adjacency are managed with a point-to-point (P2P) hello.

HDLC ISIS

Packets: 26 Duration: 113s Downloads: 6021

ISIS_level2_adjacency.cap 51.8 KB

Submitted Sep 14, 2009

Routers 3 and 4 form an IS-IS level 2 adjacency.

Ethernet ISIS LLC

Packets: 43 Duration: 85s Downloads: 5517

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: 5015

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: 4416

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: 6224

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: 8886

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: 5619

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: 9599

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: 7261

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: 8013

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: 5677

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: 4473

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: 7592

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: 4720

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: 5124

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: 5007

Showing 101 - 125 of 149