T-ISP-025 · Multi-AS Route Table Diff

Compare BGP/RIB tables across multiple ASBRs or route-reflectors to detect inconsistent best-paths, missing prefixes, and next-hop divergence between vantage points.

Cisco IOS-XR

Cisco IOS/XE

Juniper Junos

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Capabilities

Multi-router RIB collect
Missing-prefix detection
Next-hop divergence
Best-path inconsistency
Per-vantage rollup
JSON diff report

Required inputs

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

Parameter	Type	Default	Notes
Address family (ipv4\|ipv6) afi	string	ipv4	—
Max diffs to report max_diffs	number	200	—

Hint 1 — Name your vendors and OS versions

Mention the exact platforms you run (Cisco IOS-XR, Cisco IOS/XE, Juniper Junos) so the generated isp & peering logic uses the right CLI/NETCONF syntax.

Hint 2 — State your real thresholds

Provide concrete values for Address family (ipv4|ipv6), Max diffs to report instead of the defaults — they shape what counts as a fault.

Hint 3 — Prioritize the checks you need

This tool can multi-router RIB collect and missing-prefix detection. 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

2026-06-15 18:00:00 INFO  Collected RIB from 4 vantage points (ipv4)
2026-06-15 18:00:01 WARN  198.51.100.0/24: missing on asbr-03
2026-06-15 18:00:01 WARN  203.0.113.0/24: next-hop divergence (3 distinct)
2026-06-15 18:00:01 INFO  Report written to route-diff.json (2 diffs)