Packet Captures
Viewing 1 - 15 of 15
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ospf over gre tunnel.cap (8.2 KB)
| Packets: 63 | Duration: 241s | Downloads: 6248 |
Configured ospf over GRE tunnel in which packets are double tagged with ip header, useful when there is no direct connection between the 2 routers but still we need to run ospf.
ospf simple password authentication.cap (766 bytes)
| Packets: 7 | Duration: 60s | Downloads: 3325 |
Simple password authentication in ospf in which we can see password in clear text.
Also the auth type is also specified in the packet which is simple password.
I have also found a very interesting article regarding md5 auth mistakes made by many network engineers the link of which is below.
http://packetlife.net/blog/2010/jun/1/ospfv2-authentication-confusion/
- Categories: Authentication
- Protocols: IP, OSPF
ICMP_over_L2TPv3_Pseudowire.pcap.cap (5.3 KB)
| Packets: 38 | Duration: 30s | Downloads: 6577 |
ICMP pings from a CE to a second CE via a L2TPv3 pseudowire.
OSPF_Down-Bit.cap (8.9 KB)
| Packets: 98 | Duration: 203s | Downloads: 5067 |
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
OSPF_with_MD5_auth.cap (4.6 KB)
| Packets: 34 | Duration: 63s | Downloads: 3655 |
An OSPF adjacency is formed between two routers configured to use MD5 authentication.
- Categories: Routing Protocols
- Protocols: Ethernet, IP, OSPF
OSPF_type7_LSA.cap (3.6 KB)
| Packets: 25 | Duration: 32s | Downloads: 3885 |
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.
- Categories: Routing Protocols
- Protocols: Ethernet, IP, OSPF
OSPF_point-to-point_adjacencies.cap (9.9 KB)
| Packets: 93 | Duration: 35s | Downloads: 4468 |
The frame relay network between four routers is configured with point-to-point subinterfaces. No DR/BDR is required as all adjacencies are point-to-point. Capture perspective from R1.
- Categories: Routing Protocols
- Protocols: Frame Relay, IP, OSPF
OSPF_NBMA_adjacencies.cap (11.7 KB)
| Packets: 99 | Duration: 66s | Downloads: 3360 |
Formation of OSPF adjacencies across a Non-broadcast Multiaccess (NBMA) frame relay topology. Neighbors have been manually specified on all routers, with R1 configured to become the DR. No BDR is present. Capture perspective from R1.
- Categories: Routing Protocols
- Protocols: Frame Relay, IP, OSPF
OSPF_multipoint_adjacencies.cap (16.3 KB)
| Packets: 196 | Duration: 277s | Downloads: 4082 |
Routers 1 through 4 are configured to view the non-broadcast frame relay network as a point-to-multipoint topology. Adjacencies are formed without the need of a DR or BDR. Note that inverse ARP was used to dynamically learn the addresses of neighbors.
- Categories: Routing Protocols
- Protocols: ARP, Frame Relay, IP, LMI, OSPF, Q933
OSPF_LSA_types.cap (4.0 KB)
| Packets: 30 | Duration: 63s | Downloads: 4646 |
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.
- Categories: Routing Protocols
- Protocols: Ethernet, IP, OSPF
OSPF_broadcast_adjacencies.cap (8.4 KB)
| Packets: 74 | Duration: 95s | Downloads: 4087 |
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.
- Categories: Routing Protocols
- Protocols: Ethernet, IP, OSPF
OSPFv3_with_AH.cap (10.7 KB)
| Packets: 61 | Duration: 170s | Downloads: 3815 |
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.
- Categories: Authentication, Routing Protocols
- Protocols: Ethernet, IPv6, OSPF
OSPFv3_NBMA_adjacencies.cap (12.9 KB)
| Packets: 86 | Duration: 90s | Downloads: 2877 |
Router 3 forms OSPFv3 adjacencies with routers 1 and two across the non-broadcast multi-access (NBMA) frame relay link.
- Categories: Routing Protocols
- Protocols: Frame Relay, IPv6, OSPF
OSPFv3_multipoint_adjacencies.cap (11.5 KB)
| Packets: 73 | Duration: 35s | Downloads: 2931 |
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.
- Categories: Routing Protocols
- Protocols: Frame Relay, IPv6, OSPF
OSPFv3_broadcast_adjacency.cap (5.4 KB)
| Packets: 38 | Duration: 70s | Downloads: 3274 |
Routers 1 and 2 form an OSPFv3 adjacency across their common Ethernet link (2001:db8:0:12::/64).
- Categories: Routing Protocols
- Protocols: Ethernet, IPv6, OSPF
Viewing 1 - 15 of 15
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