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Agent skill

Network Bgp Diagnostics

by affaan-m in affaan-m/ECC

Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection.

MITAuto-check passedSecurity

Install Network Bgp Diagnostics

skills CLI
$ npx skills add affaan-m/ECC --skill network-bgp-diagnostics -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install affaan-m/ECC network-bgp-diagnostics --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/network-bgp-diagnostics .claude/skills/network-bgp-diagnostics && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
network-bgp-diagnostics
GitHub stars
276k
Used in
1 other repo
Token cost
~1.4k tokens
SKILL.md length
476 words
Files
1
Skills in repo
683
Repo updated
First seen
Licence
MIT

At a glance

Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection.

  • Works in 5 steps: Identify the exact neighbor, address… → Capture summary state and last reset… → Prove reachability to the peer source… → …
  • A BGP neighbor is down
  • SKILL.md covers When to Use, Read-Only Triage Flow, State Interpretation and Transport Checks, plus 6 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Network Bgp Diagnostics is an agent skill from affaan-m/ECC. Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection. Use when a BGP neighbor is down, routes are missing, or prefix policy and AS path need inspection.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Security, covering Digital forensics. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

  • A BGP neighbor is down
  • Routes are missing
  • Prefix policy and AS path need inspection

Example prompts

  • “/network-bgp-diagnostics”

Requirements

  • Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Identify the exact neighbor, address family, VRF, and local/remote ASNs.
  2. Capture summary state and last reset reason.
  3. Prove reachability to the peer source address.
  4. Check route policy references before assuming transport failure.
  5. Compare advertised, received, and installed routes where the platform

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are python).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Network Bgp Diagnostics loads about 1.4k tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 476 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 476 words, ~1,411 tokens.

Download SKILL.mdSave it as .claude/skills/network-bgp-diagnostics/SKILL.md (or your agent's skills folder).
name
network-bgp-diagnostics
description
Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection. Use when a BGP neighbor is down, routes are missing, or prefix policy and AS path need inspection.
metadata.origin
community

Network BGP Diagnostics

Use this skill when a BGP session is down, flapping, established with missing routes, or advertising unexpected prefixes. The default workflow is read-only evidence collection; policy and reset actions belong in a reviewed change window.

When to Use

  • BGP neighbors are stuck in Idle, Connect, Active, OpenSent, or OpenConfirm.
  • A session is Established but expected prefixes are missing.
  • A route-map, prefix-list, max-prefix limit, or AS path policy may be filtering routes.
  • You need before/after evidence for a BGP change.
  • You are reviewing automation that parses BGP summary output.

Read-Only Triage Flow

  1. Identify the exact neighbor, address family, VRF, and local/remote ASNs.
  2. Capture summary state and last reset reason.
  3. Prove reachability to the peer source address.
  4. Check route policy references before assuming transport failure.
  5. Compare advertised, received, and installed routes where the platform supports those commands.
text
show bgp summary
show bgp neighbors <peer>
show ip route <peer>
show tcp brief | include <peer>|:179
show logging | include BGP|<peer>
show running-config | section router bgp
show ip prefix-list
show route-map

Use platform-specific address-family commands when the device uses VRFs, IPv6, VPNv4, or EVPN. Do not assume global IPv4 unicast.

State Interpretation

StateFirst checks
Established with prefix countRoute exchange is up; inspect policy and table selection
Established with zero prefixesCheck inbound policy, max-prefix, advertised routes, and AFI/SAFI
ActiveTCP session is not completing; check routing, source, ACLs, and peer reachability
ConnectTCP connection is in progress; check path and remote listener
OpenSent/OpenConfirmTCP works; check ASN, authentication, timers, capabilities, and logs
IdleNeighbor may be disabled, missing config, blocked by policy, or backoff timer

Transport Checks

text
ping <peer> source <local-source>
traceroute <peer> source <local-source>
show ip route <peer>
show bgp neighbors <peer> | include BGP state|Last reset|Local host|Foreign host

If the peer is sourced from a loopback, confirm both directions route to the loopback addresses and that the neighbor config uses the expected update source.

Avoid disabling ACLs or firewall policy as a diagnostic shortcut. Read hit counters, logs, and path state first.

Show full SKILL.md (191 more words)Show less

Route Policy Checks

text
show bgp neighbors <peer> advertised-routes
show bgp neighbors <peer> routes
show ip prefix-list <name>
show route-map <name>
show bgp <prefix>

Some platforms require additional configuration before received-routes is available. Do not add that configuration during incident triage unless the operator approves the change.

AS Path And Prefix Review

text
show bgp regexp _65001_
show bgp regexp ^65001$
show bgp <prefix>
show bgp neighbors <peer> advertised-routes | include Network|Path|<prefix>

Use AS-path regex carefully. _65001_ matches AS 65001 as a token. Plain 65001 can match longer ASNs or unrelated text.

Parser Pattern

python
import re
from typing import Any

BGP_SUMMARY_RE = re.compile(
    r"^(?P<neighbor>\d{1,3}(?:\.\d{1,3}){3})\s+"
    r"(?P<version>\d+)\s+"
    r"(?P<remote_as>\d+)\s+"
    r"(?P<msg_rcvd>\d+)\s+"
    r"(?P<msg_sent>\d+)\s+"
    r"(?P<table_version>\d+)\s+"
    r"(?P<input_queue>\d+)\s+"
    r"(?P<output_queue>\d+)\s+"
    r"(?P<uptime>\S+)\s+"
    r"(?P<state_or_prefixes>\S+)$",
    re.M,
)

def parse_bgp_summary(raw: str) -> list[dict[str, Any]]:
    rows = []
    for match in BGP_SUMMARY_RE.finditer(raw):
        state_or_prefixes = match.group("state_or_prefixes")
        if state_or_prefixes.isdigit():
            state = "Established"
            prefixes_received = int(state_or_prefixes)
        else:
            state = state_or_prefixes
            prefixes_received = None
        rows.append({
            "neighbor": match.group("neighbor"),
            "remote_as": int(match.group("remote_as")),
            "state": state,
            "prefixes_received": prefixes_received,
            "uptime": match.group("uptime"),
        })
    return rows

Prefer structured parser output when available, but store raw output with the incident record because BGP summary formats vary by platform and address family.

Change-Window Only

These actions can affect routing and should not be suggested as automatic diagnostics:

  • Clearing a BGP session.
  • Changing neighbor authentication, timers, update source, route-maps, or prefix-lists.
  • Enabling additional received-route storage.
  • Relaxing firewall, ACL, or control-plane policy.

If a reset is approved, prefer the least disruptive soft or route-refresh option supported by the platform and document exactly why it is safe.

Anti-Patterns

  • Assuming Active always means the remote side is down.
  • Ignoring VRF, address family, or update-source differences.
  • Using broad AS-path regex without token boundaries.
  • Hard-resetting a peer before reading last reset reason and logs.
  • Treating missing received-routes output as proof that no routes arrived.

See Also

  • Skill: cisco-ios-patterns
  • Skill: network-config-validation
  • Skill: network-interface-health

© affaan-m, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/network-bgp-diagnostics of affaan-m/ECC.

Open the folder on GitHubat commit 4eb71d9

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in affaan-m/ECC, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Network Bgp Diagnostics next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Network Bgp Diagnostics compared with similar skills
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Network Bgp Diagnostics this skillaffaan-m/ECC276k1 repos~1.4kAutomated safety check: PassMIT
Campaign Attribution Evidence Analysismukul975/Anthropic-Cybersecurity-Skills34k—~2.3kAutomated safety check: PassApache-2.0
Oss ForensicsTommy-yw/RunbookHermes5463 repos~5kAutomated safety check: PassMIT
Ctf Malwareljagiello/ctf-skills3.4k—~2.1kAutomated safety check: NotesMIT
LNK and Jump List Forensicsmukul975/Anthropic-Cybersecurity-Skills34k—~2.8kAutomated safety check: PassApache-2.0
Malware Persistence Analysis with Autorunsmukul975/Anthropic-Cybersecurity-Skills34k—~1.2kAutomated safety check: PassApache-2.0

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Categories

Questions about Network Bgp Diagnostics

What does Network Bgp Diagnostics do?

Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection. Network Bgp Diagnostics is an agent skill from affaan-m/ECC. Diagnostics-only BGP troubleshooting patterns for neighbor state, route exchange, prefix policy, AS path inspection, and safe evidence collection.

When should I use Network Bgp Diagnostics?

Network Bgp Diagnostics fits situations like: A BGP neighbor is down; routes are missing; prefix policy and AS path need inspection.

How do I install Network Bgp Diagnostics in Claude Code?

Run `npx skills add affaan-m/ECC --skill network-bgp-diagnostics -a claude-code`. Or copy the skill folder (skills/network-bgp-diagnostics in affaan-m/ECC) into .claude/skills/network-bgp-diagnostics in your project. Claude Code loads it when a task matches its description.

How do I install Network Bgp Diagnostics in Codex?

Run `npx skills add affaan-m/ECC --skill network-bgp-diagnostics -a codex`. Or copy the skill folder (skills/network-bgp-diagnostics in affaan-m/ECC) into .agents/skills/network-bgp-diagnostics in your project. Codex loads it when a task matches its description.

Can I use Network Bgp Diagnostics in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill network-bgp-diagnostics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/network-bgp-diagnostics, .gemini/skills/network-bgp-diagnostics, .github/skills/network-bgp-diagnostics and .opencode/skills/network-bgp-diagnostics in your project.

What does Network Bgp Diagnostics need to run?

SKILL.md names no scripts, command-line tools or credentials: Network Bgp Diagnostics is instructions for the agent only. Our summary lists: Python 3.

Does Network Bgp Diagnostics access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Network Bgp Diagnostics safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Network Bgp Diagnostics use?

Network Bgp Diagnostics is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Network Bgp Diagnostics use?

About 1.4k tokens (SKILL.md is roughly 5.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Network Bgp Diagnostics?

Skills that share tags, products or a category with Network Bgp Diagnostics: Campaign Attribution Evidence Analysis (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Oss Forensics (Tommy-yw/RunbookHermes, 546 stars), Ctf Malware (ljagiello/ctf-skills, 3.4k stars) and LNK and Jump List Forensics (mukul975/Anthropic-Cybersecurity-Skills, 34k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Network Bgp Diagnostics?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.