Packet Captures
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traceroute_MPLS.cap (3.3 KB)
| Packets: 29 | Duration: 3s | Downloads: 2908 |
Frame-Relay over MPLS.pcap.cap (1.4 KB)
| Packets: 10 | Duration: 1s | Downloads: 3976 |
ICMP on a Frame-relay over MPLS link. If Wireshark doesn't understand it's FR, right click on a packet, select "Decode as" from the menu and select "Frame Relay DLCI PW" on the "MPLS" tab.
EoMPLS_802.1q.pcap.cap (1.6 KB)
| Packets: 10 | Duration: 1s | Downloads: 3988 |
ICMP over EoMPLS with 802.1q tagging
LDP_Ethernet_FrameRelay.pcap.cap (2.1 KB)
| Packets: 14 | Duration: 7s | Downloads: 3495 |
LDP with pseudowire FEC elements (Ethernet and Frame-Relay DLCI-to-DLCI)
EoMPLS.cap (7.0 KB)
| Packets: 56 | Duration: 32s | Downloads: 3768 |
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.
MPLS_encapsulation.cap (1.3 KB)
| Packets: 10 | Duration: n/a | Downloads: 2682 |
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).
LDP_adjacency.cap (5.7 KB)
| Packets: 61 | Duration: 108s | Downloads: 2247 |
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.
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