CDP/LLDP Network Discovery Crawler for Cisco networks

This is experimental at the moment. Uses netmiko and some seed devices to scrape your network and output CSV files of all neighbor topology data, as well as a device list file. Uses threaded connections at each iteration, moving out from seed devices to next level of devices until all devices are discovered.

Uses a BFS algorithm with netmiko, and calculates distances from seed devices. Currently only works with SSH access to Cisco IOS and NXOS devices, but other devices could be added easily. Will gather all neighbors and devices found, but can only scrape cisco devices to discover next level devices at the moment.

Usage Example: Scrape network starting with the core devices

• Note: The initial devices should have the same device ID in the cdp neighbors to avoid duplicate device entries and proper distance calculations

./ndcrawl.py -seed core1.domain.com,core2.domain.com --user yantisj -nei_file nd.csv -dev_file devices.csv --debug 1

Config File Notes

Copy the ndcrawl-sample.ini to ndcrawl.ini and edit options. All CLI options can be specified from the config file for daemonizing the script. CLI options always override the config file.

Neighbor List Output Example

local_device_id,distance,remote_device_id,platform,local_int,remote_int,ipv4,os
core1.domain.com,0,mdcoobsw1.domain.com,WS-C4948,mgmt0,GigabitEthernet1/1,10.25.9.1,cisco_ios
core1.domain.com,0,servchas1.domain.com,WS-C6504-E,Ethernet7/25,TenGigabitEthernet3/1,10.24.70.51,cisco_ios
core1.domain.com,0,core2.domain.com,N7K-C7010,Ethernet7/26,Ethernet8/26,10.25.156.103,cisco_nxos
core1.domain.com,0,artmdf1.domain.com,N7K-C7010,Ethernet7/27,Ethernet2/26,10.25.80.103,cisco_nxos

Device List Output Example

device_id,ipv4,platform,os
core1.domain.com,10.25.9.103,N7K-C7010,cisco_nxos
cnew1.domain.com,10.25.9.10,N9K-C93180YC-EX,cisco_nxos