Protocol » Internet Control Message Protocol (Info)
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path_MTU_discovery.cap (6.2 KB)

Packets: 8 Avg Size: 780 bytes Duration: 0.0 sec
Data Rate: 12820.21 Kbps Added: 14 Aug 2008 Downloads: 602

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 Avg Size: 116 bytes Duration: 0.3 sec
Data Rate: 26.50 Kbps Added: 15 Jul 2008 Downloads: 583

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 Avg Size: 134 bytes Duration: 0.1 sec
Data Rate: 145.38 Kbps Added: 21 Jun 2008 Downloads: 240

Direct IP-in-IP tunnel encapsulation (configured in Cisco IOS with tunnel mode ipip).

ICMP_across_dot1q.cap (1.7 KB)

Packets: 15 Avg Size: 96 bytes Duration: 35.0 sec
Data Rate: 0.32 Kbps Added: 20 Jun 2008 Downloads: 474

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.

PPP.cap (3.6 KB)

Packets: 50 Avg Size: 58 bytes Duration: 83.1 sec
Data Rate: 0.27 Kbps Added: 16 Jun 2008 Downloads: 274

ICMP across a PPP serial link.

HDLC.cap (3.4 KB)

Packets: 38 Avg Size: 76 bytes Duration: 111.4 sec
Data Rate: 0.20 Kbps Added: 16 Jun 2008 Downloads: 276

ICMP across an HDLC serial link.

ICMP_across_frame_relay.cap (1.2 KB)

Packets: 10 Avg Size: 104 bytes Duration: 0.1 sec
Data Rate: 71.41 Kbps Added: 14 Jun 2008 Downloads: 228

A Cisco 3725 pinging its neighbor across a point-to-point frame relay connection.

Viewing 1 - 7 of 7 captures