Packet Captures

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ICMP_over_L2TPv3_Pseudowire.pcap.cap (5.3 KB)

Packets: 38 Duration: 30s Downloads: 3134

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

rpvstp-trunk-native-vid5.pcap.cap (1.8 KB)

Packets: 22 Duration: 11s Downloads: 4161

Rapid per-VLAN spanning tree capture of a trunk port, configured with native VLAN 5, VLAN 1 is also active over the trunk.

Capture shows that 3 BPDUs are sent out, one for classic STP (Frame 4, for example), one for the native VLAN 5 (not tagged - Frame 5) and one for each other active VLAN (tagged - Frame 3).

The PVST BPDUs contain the VLAN ID at the end of the frame (01 and 05, respectively).

rpvstp-trunk-native-vid1.pcap.cap (6.4 KB)

Packets: 81 Duration: 45s Downloads: 3367

Rapid per-VLAN spanning tree capture of a trunk port, configured with native VLAN 1 (default), VLAN 5 is also active over the trunk.

Capture shows that 3 BPDUs are sent out, one for classic STP (Frame 4, for example), one for the native VLAN (not tagged - Frame 3) and one for each other active VLAN (tagged - Frame 5).

The PVST BPDUs contain the VLAN ID at the end of the frame (01 and 05, respectively).

rpvstp-access.pcap.cap (3.7 KB)

Packets: 49 Duration: 77s Downloads: 3133

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

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.

Ethernet_keepalives.cap (1012 bytes)

Packets: 13 Duration: 120s Downloads: 1697

Loopback keepalives transmitted by an Ethernet interface.

Viewing 1 - 6 of 6

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