TRACE CABLES THE EASY WAY WITH CISCO CDP ON WINDOWS

Download tool from:
https://www.definit.co.uk/2010/02/trace-cables-the-easy-way-with-cisco-cdp-on-windows/

Example of usage:
Step1:

c:\temp\tcpdump>tcpdump.exe -D

********************************************************************
**                                                                **
**              Tcpdump v4.9.2 (September 03, 2017)               **
**                   http://www.tcpdump.org                       **
**                                                                **
** Tcpdump for Windows is built with Microolap Packet Sniffer SDK **
**              Microolap EtherSensor product family              **
**               >>> build 5072.01 June 10, 2019 <<<              **
**                                                                **
**        Copyright(c) 1997 - 2019 Microolap Technologies         **
**       http://microolap.com/products/network/ethersensor        **
**         http://microolap.com/products/network/tcpdump          **
**                                                                **
**                  XP/2003/Vista/2008/Win7/Win8                  **
**                 Win2012/Win10/Win2016/Win2019                  **
**               (UEFI and Secure Boot compatible)                **
**                                                                **
**                       Trial license.                           **
**                                                                **
********************************************************************

1.\Device\{F4F682D0-3FEA-4DF1-9385-878235FC4177} (Intel(R) I350 Gigabit Network Connection)
2.\Device\{FF4C946F-ADB3-4DC9-A61A-A91973AFD7E8} (Intel(R) I350 Gigabit Network Connection)
3.\Device\{6C48897F-B39D-4298-B3D3-19402E588D0E} (Intel(R) I350 Gigabit Network Connection)
4.\Device\{D6A49332-2416-4227-89F5-55A5AA19578F} (Intel(R) Ethernet Converged Network Adapter X710)
5.\Device\{7C3220F8-224E-4867-B050-E252D849E404} (Intel(R) Ethernet Converged Network Adapter X710-2)
6.\Device\{9A86189E-CD60-4FD6-93C5-64E8DF14337D} (Intel(R) Ethernet Converged Network Adapter X710-2)
7.\Device\{32BBADAE-BA53-433C-B796-C51CC9526F23} (Intel(R) I350 Gigabit Network Connection)
8.\Device\{B87C05E6-1BF1-4126-AF7C-E01BC0D507DD} (Intel(R) Ethernet Controller X540-AT2)
9.\Device\{543DFBD5-610B-4165-B9B2-B1C6447272C7} (Intel(R) Ethernet Converged Network Adapter X710)
10.\Device\{CB9851A4-A64A-4F31-8AF8-97A812217C44} (Intel(R) Ethernet Controller X540-AT2)

which of interfaces is our?
Step2:

Step3:
Now we know value for parameter -i

c:\temp\tcpdump>tcpdump -i 1 -nn -v -s 1500 -c 1 ether[20:2] == 0x2000

********************************************************************
**                                                                **
**              Tcpdump v4.9.2 (September 03, 2017)               **
**                   http://www.tcpdump.org                       **
**                                                                **
** Tcpdump for Windows is built with Microolap Packet Sniffer SDK **
**              Microolap EtherSensor product family              **
**               >>> build 5072.01 June 10, 2019 <<<              **
**                                                                **
**        Copyright(c) 1997 - 2019 Microolap Technologies         **
**       http://microolap.com/products/network/ethersensor        **
**         http://microolap.com/products/network/tcpdump          **
**                                                                **
**                  XP/2003/Vista/2008/Win7/Win8                  **
**                 Win2012/Win10/Win2016/Win2019                  **
**               (UEFI and Secure Boot compatible)                **
**                                                                **
**                       Trial license.                           **
**                                                                **
********************************************************************

tcpdump: listening on \Device\{F4F682D0-3FEA-4DF1-9385-878235FC4177}, link-type EN10MB (Ethernet), capture size 1500 bytes
10:43:10.037097 CDPv2, ttl: 180s, checksum: 0xca19 (unverified), length 398
        Device-ID (0x01), value length: 22 bytes: 'DC2_AcSw_01.ITFORCE'
        Version String (0x05), value length: 250 bytes:
          Cisco IOS Software [Fuji], Catalyst L3 Switch Software (CAT9K_LITE_IOSXE), Version 16.9.5, RELEASE SOFTWARE (fc1)
          Technical Support: http://www.cisco.com/techsupport
          Copyright (c) 1986-2020 by Cisco Systems, Inc.
          Compiled Thu 30-Jan-20 18:08 by mcpre
        Platform (0x06), value length: 19 bytes: 'cisco C9200L-48T-4X'
        Address (0x02), value length: 13 bytes: IPv4 (1) 10.10.10.170
        Port-ID (0x03), value length: 20 bytes: 'GigabitEthernet1/0/2'
        Capability (0x04), value length: 4 bytes: (0x00000028): L2 Switch, IGMP snooping
        VTP Management Domain (0x09), value length: 0 bytes: ''
        Native VLAN ID (0x0a), value length: 2 bytes: 80
        Duplex (0x0b), value length: 1 byte: full
        AVVID trust bitmap (0x12), value length: 1 byte: 0x00
        AVVID untrusted ports CoS (0x13), value length: 1 byte: 0x00
        Management Addresses (0x16), value length: 13 bytes: IPv4 (1) 10.10.10.170
1 packet captured
10473 packets received by filter
0 packets dropped by kernel