Packet Captures
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traceroute_MPLS.cap (3.3 KB)
| Packets: 29 | Duration: 3s | Downloads: 2948 |
PPP_negotiation.cap (4.6 KB)
| Packets: 63 | Duration: 67s | Downloads: 3937 |
path_MTU_discovery.cap (6.2 KB)
| Packets: 8 | Duration: n/a | Downloads: 2501 |
Tracepath is used to determine the MTU of the path between hosts 192.168.0.2 and .1.2. Packet #6 contains an ICMP "fragmentation needed" message, indicating the MTU for that hop is 1400 bytes.
MPLS_encapsulation.cap (1.3 KB)
| Packets: 10 | Duration: n/a | Downloads: 2688 |
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).
IP_in_IP.cap (1.5 KB)
| Packets: 10 | Duration: n/a | Downloads: 2013 |
Direct IP-in-IP tunnel encapsulation (configured in Cisco IOS with tunnel mode ipip).
ICMP_across_frame_relay.cap (1.2 KB)
| Packets: 10 | Duration: n/a | Downloads: 2202 |
A Cisco 3725 pinging its neighbor across a point-to-point frame relay connection.
- Categories: None
- Protocols: Frame Relay, ICMP, IP
ICMP_across_dot1q.cap (1.7 KB)
| Packets: 15 | Duration: 35s | Downloads: 2985 |
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.
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