Netmiko vs NAPALM vs Nornir: Which One, and When
Stop arguing about frameworks — they sit at different layers and compose.
The "Netmiko or NAPALM or Nornir?" debate is a category error. They live at different layers. The real skill is knowing which layer your problem belongs to.
The one-line summary
- Netmiko — raw CLI over SSH. You send strings, you get strings. Maximum control, maximum parsing work.
- NAPALM — structured, multivendor getters. You ask for BGP neighbors, you get a dict. Less control, far less parsing.
- Nornir — an inventory and a parallel task runner. It does not talk to devices itself; it orchestrates Netmiko or NAPALM across hundreds of them.
Comparison matrix
| Concern | Netmiko | NAPALM | Nornir |
|---|---|---|---|
| Output shape | Raw text | Structured dict | Delegates |
| Multivendor | Manual | Built-in | Via plugins |
| Parallelism | DIY threads | DIY threads | Built-in |
| Inventory | None | None | First-class |
| Best for | Odd CLI commands | Common getters | Fleet-wide tasks |
The same task, three ways
Netmiko — you parse
from netmiko import ConnectHandler
conn = ConnectHandler(device_type="cisco_ios", host="10.0.0.11",
username="ro", password="••••")
out = conn.send_command("show ip bgp summary") # raw text → parse yourselfNAPALM — it parses
from napalm import get_network_driver
with get_network_driver("ios")("10.0.0.11", "ro", "••••") as dev:
peers = dev.get_bgp_neighbors() # structured dict, ready to assertNornir — across the fleet
from nornir import InitNornir from nornir_napalm.plugins.tasks import napalm_get nr = InitNornir(config_file="config.yaml") result = nr.run(task=napalm_get, getters=["bgp_neighbors"]) # all devices, in parallel
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