Packet Captures

OCSP-Not_Implemted.cap (1.1 KB)

OCSP-Not_Implemted

• Categories: Encryption
• Protocols: HTTP, IP, OCSP, TCP

OCSP-Good.cap (3.5 KB)

OCSP_Good (CRL HTTPS CA Verisign)

• Categories: Encryption
• Protocols: DNS, HTTP, IP, OCSP, TCP, UDP

cm4116_telnet.cap (9.4 KB)

Short Telnet session with an Opengear CM4116 used to demonstrate the urgent flag and pointer

• Categories: Management
• Protocols: Ethernet, IP, TCP, Telnet

DHCP_MessageType 10,11,12 and 13.cap (1.9 KB)

• Categories: None
• Protocols: BOOTP, Ethernet, IP, UDP

WCCPv2.pcap.cap (2.8 KB)

WCCP communication captures between 7200 Router and a WCCP capable optimization device (In my case it is Riverbed's Stealhead 2050)

• Categories: None
• Protocols: Ethernet, IP, UDP, WCCP

ICMP_over_L2TPv3_Pseudowire.pcap.cap (5.3 KB)

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

• Categories: Tunneling
• Protocols: Ethernet, IP, L2TP, LOOP, OSPF

BGP_MP_NLRI.cap (2.9 KB)

IPv6 routes are carried as a separate address family inside MP_REACH_NLRI attributes.

• Categories: Routing Protocols
• Protocols: BGP, Ethernet, IP, IPv6, TCP

4-byte_AS_numbers_Mixed_Scenario.cap (414 bytes)

• Categories: Routing Protocols
• Protocols: BGP, HDLC, IP, TCP

rpvstp-access.pcap.cap (3.7 KB)

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

• Categories: Switching
• Protocols: DNS, Ethernet, IP, LLC, LOOP, STP, UDP

BGP_MD5.cap (1.7 KB)

An EBGP with TCP MD5 authentication enabled

• Categories: Authentication, Routing Protocols
• Protocols: BGP, Ethernet, IP, TCP

OSPF_Down-Bit.cap (8.9 KB)

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

• Categories: Routing Protocols
• Protocols: CDP, HDLC, IP, OSPF, SLARP

EoMPLS.cap (7.0 KB)

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.

• Categories: MPLS
• Protocols: Ethernet, IP, LOOP, MPLS, TCP, UDP

PIM_register_register-stop.cap (258 bytes)

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.

• Categories: Multicast
• Protocols: Ethernet, IP, PIM

VRRP_preempt.cap (1.2 KB)

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.

• Categories: Redundancy
• Protocols: Ethernet, IP, VRRP