T-ISP-004 · Prefix-List Generator & Auditor

Build per-customer/peer prefix-lists from IRR (AS-SET) data via an IRR/whois proxy, audit live device prefix-lists for drift, and emit corrected configuration.

Cisco IOS/XE

Cisco IOS-XR

Juniper Junos

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Capabilities

IRR AS-SET expansion
Aggregation + dedup
Live config drift audit
Vendor config rendering
Max-length sanity guards
CSV/JSON change report

Required inputs

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

Parameter	Type	Default	Notes
IRR AS-SET as_set	string	AS-EXAMPLE	—
IRR proxy URL irr_url	string	https://irr.example.net	—

Hint 1 — Name your vendors and OS versions

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

Hint 2 — State your real thresholds

Provide concrete values for IRR AS-SET, IRR proxy URL instead of the defaults — they shape what counts as a fault.

Hint 3 — Prioritize the checks you need

This tool can iRR AS-SET expansion and aggregation + dedup. 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 12:05:01 INFO  Expanded AS-EXAMPLE → 142 prefixes
2026-06-15 12:05:02 WARN  edge-rtr-01: 3 stale entries, 1 missing entry
2026-06-15 12:05:02 INFO  Rendered ipv4 prefix-list CUST-IN (143 lines)