cisco-network-maplisted

## Cisco Network Discovery & Mapping Scripts Write Python scripts that discover and map network topology from live devices. Follow these standards: ### Discovery Methods #### Ping Sweep - ICMP sweep across subnets to find live hosts - Use `concurrent.futures` or `asyncio` for parallel pings - Record response time and TTL (TTL helps identify device type/hop count) - Support CIDR input (e.g., `10.0.1.0/24`) and ranges - Identify likely network devices vs endpoints by TTL values (64=Linux/endpoint, 128=Windows, 255=Cisco) #### Traceroute - Trace paths between known endpoints to discover intermediate hops - Build hop-by-hop path maps - Identify asymmetric routing (trace both directions) - Detect multiple paths (ECMP) by running repeated traces - Record per-hop latency for path quality analysis #### ARP Table Collection - Pull `show ip arp` from routers/L3 switches - Map IP addresses to MAC addresses - Identify MAC vendor (OUI lookup) to determine device manufacturer - Detect duplicate IPs or MAC flapping - Cross-reference with CAM/MAC address tables for port mapping #### CDP (Cisco Discovery Protocol) - Pull `show cdp neighbors detail` from all Cisco devices - Extract: device ID, platform, IP, local/remote interface, software version, capabilities - Build adjacency graph from CDP data - Crawl the network: start at seed device, discover neighbors, SSH to each, repeat - Identify device roles from capabilities field (R=Router, S=Switch, T=Trans Bridge, etc.) #### LLDP (Link L