BFD Session Monitor

BFD health monitoring across all protocol associations: session state matrix, discriminator mapping, timer parameter consistency, micro-BFD on LAG members, and rapid-failure root cause correlation.

Cisco IOS/XE/XR

Juniper

Arista

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Capabilities

Session state matrix
BFD ↔ BGP/OSPF/IS-IS mapping
Timer consistency check
Micro-BFD on LAG
Packet loss rate per session
Discriminator mismatch
Flap history & MTBF

Required inputs

Parameters the script accepts. Defaults shown; some are vendor- or context-gated.

Parameter	Type	Default	Notes
Expected min-interval (ms) min_interval	number	300	—
Expected multiplier multiplier	number	3	—
Check micro-BFD on LAGs check_micro	bool	true	—

Hint 1 — Name your vendors and OS versions

Mention the exact platforms you run (Cisco IOS/XE/XR, Juniper, Arista) so the generated fault logic uses the right CLI/NETCONF syntax.

Hint 2 — State your real thresholds

Provide concrete values for Expected min-interval (ms), Expected multiplier, Check micro-BFD on LAGs instead of the defaults — they shape what counts as a fault.

Hint 3 — Prioritize the checks you need

This tool can session state matrix and bFD ↔ BGP/OSPF/IS-IS mapping. Ask for the subset relevant to your incident to keep output focused.

Hint 4 — Describe your inventory format

Tell the assistant whether your device list is CSV, YAML, or JSON and which columns it has, so parsing matches your data.

Sample inventory schema

Authoritative shape of the device/policy data this script consumes.

No bundled inventory sample. The script accepts standard device lists (CSV/YAML) with hostname, mgmt IP, vendor, and credentials.

Expected output

Reference terminal output the script should produce — used as a stylistic and structural target.

terminal

BFD SESSION MONITOR — 12 devices
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

SESSION STATE MATRIX:
  core-rtr-01: 4/4 sessions UP ✓
    10.0.0.2  BGP   300ms×3  state=Up   flaps=0  ✓
    10.1.0.2  OSPF  300ms×3  state=Up   flaps=0  ✓
    10.2.0.2  IS-IS 300ms×3  state=Up   flaps=0  ✓
    10.3.0.2  STATIC 300ms×3 state=Down flaps=7  ← HIGH