Per-VLAN Spanning Tree Packet Captures

ciscopvrst-dissected.txt

No.     Time           Source                Destination           Protocol Length Info
      6 2.989606       RealtekU_00:00:00     PVST+                 STP      68     RST. Root = 16384/10/52:54:00:00:00:00  Cost = 0  Port = 0x8001

Frame 6: 68 bytes on wire (544 bits), 68 bytes captured (544 bits)
    Encapsulation type: Ethernet (1)
    Arrival Time: Mar 27, 2022 16:59:32.723771000 Alaskan Daylight Time
    [Time shift for this packet: 0.000000000 seconds]
    Epoch Time: 1648429172.723771000 seconds
    [Time delta from previous captured frame: 0.283004000 seconds]
    [Time delta from previous displayed frame: 0.283004000 seconds]
    [Time since reference or first frame: 2.989606000 seconds]
    Frame Number: 6
    Frame Length: 68 bytes (544 bits)
    Capture Length: 68 bytes (544 bits)
    [Frame is marked: False]
    [Frame is ignored: False]
    [Protocols in frame: eth:ethertype:vlan:llc:stp]
    [Coloring Rule Name: Broadcast]
    [Coloring Rule String: eth[0] & 1]
Ethernet II, Src: RealtekU_00:00:00 (52:54:00:00:00:00), Dst: PVST+ (01:00:0c:cc:cc:cd)
    Destination: PVST+ (01:00:0c:cc:cc:cd)
        Address: PVST+ (01:00:0c:cc:cc:cd)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
    Source: RealtekU_00:00:00 (52:54:00:00:00:00)
        Address: RealtekU_00:00:00 (52:54:00:00:00:00)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
    Type: 802.1Q Virtual LAN (0x8100)
802.1Q Virtual LAN, PRI: 0, DEI: 0, ID: 10
    000. .... .... .... = Priority: Best Effort (default) (0)
    ...0 .... .... .... = DEI: Ineligible
    .... 0000 0000 1010 = ID: 10
    Length: 50
Logical-Link Control
    DSAP: SNAP (0xaa)
        1010 101. = SAP: SNAP
        .... ...0 = IG Bit: Individual
    SSAP: SNAP (0xaa)
        1010 101. = SAP: SNAP
        .... ...0 = CR Bit: Command
    Control field: U, func=UI (0x03)
        000. 00.. = Command: Unnumbered Information (0x00)
        .... ..11 = Frame type: Unnumbered frame (0x3)
    Organization Code: 00:00:0c (Cisco Systems, Inc)
    PID: PVSTP+ (0x010b)
Spanning Tree Protocol
    Protocol Identifier: Spanning Tree Protocol (0x0000)
    Protocol Version Identifier: Rapid Spanning Tree (2)
    BPDU Type: Rapid/Multiple Spanning Tree (0x02)
    BPDU flags: 0x3c, Forwarding, Learning, Port Role: Designated
        0... .... = Topology Change Acknowledgment: No
        .0.. .... = Agreement: No
        ..1. .... = Forwarding: Yes
        ...1 .... = Learning: Yes
        .... 11.. = Port Role: Designated (3)
        .... ..0. = Proposal: No
        .... ...0 = Topology Change: No
    Root Identifier: 16384 / 10 / 52:54:00:00:00:00
        Root Bridge Priority: 16384
        Root Bridge System ID Extension: 10
        Root Bridge System ID: RealtekU_00:00:00 (52:54:00:00:00:00)
    Root Path Cost: 0
    Bridge Identifier: 16384 / 10 / 52:54:00:00:00:00
        Bridge Priority: 16384
        Bridge System ID Extension: 10
        Bridge System ID: RealtekU_00:00:00 (52:54:00:00:00:00)
    Port identifier: 0x8001
    Message Age: 0
    Max Age: 20
    Hello Time: 2
    Forward Delay: 15
    Version 1 Length: 0
    Originating VLAN (PVID): 10
        Type: Originating VLAN (0x0000)
        Length: 2
        Originating VLAN: 10