# Knowledge Plane Analysis: Server Overload Fault

## 1. User feedback

The User agent delivered a substantively correct answer to the human. Its final report stated:

> "acm.org returned HTTP 503 Service Unavailable via both HTTP/HTTPS; network connectivity is healthy but ACM's servers appear temporarily unavailable"

Its self-report elaborates: *"The failure to load `acm.org` was due to ACM's servers returning a 503 error, likely a temporary outage. Local network configuration and connectivity were confirmed healthy. The user should retry later or contact ACM support for further assistance."*

**This diagnosis is accurate and actionable.** Measured against the injected fault (an overloaded ACM server returning 503 to all new connections), the User agent correctly:

- Identified the observable symptom (HTTP 503 on both HTTP and HTTPS — `"< HTTP/1.1 503 Service Unavailable"` from both `curl -v http://acm.org` and `curl -v https://acm.org`)
- Ruled out local causes by testing them: ping to Uni's peer succeeded, `ping acm.org` succeeded (`"3 packets transmitted, 3 received, 0% packet loss"`), and DNS resolved correctly (`"dig +short acm.org" → "198.82.0.1"`)
- Attributed responsibility to ACM's domain: *"A server-side 503 error typically indicates temporary unavailability (e.g., maintenance, overload, or backend failure), not network routing issues"*
- Gave reasonable user guidance: retry later or contact ACM support

Crucially, the User agent reached this answer **entirely on its own**, without ever involving the KP — it never sent a WHY to Uni. That's a notable shortcut: the diagnosis is correct, but the human got an answer that bypassed the cooperative diagnostic mechanism the experiment is designed around.

## 2. Agent collaboration

The KP chain for the user's actual complaint never formed. The User agent diagnosed locally and called `report_done` at 19:31 without ever asking Uni for help. Uni, in turn, terminated at 19:32 having configured routing but never having received a WHY from User.

However, a separate, parallel collaboration was triggered by ACM and Web after they observed their own problems. The key exchanges:

- **ACM → AS2** (early): *"Please share your advertised routes, including those covering your hosted web server"* — legitimate routing setup.
- **ACM → Web** repeatedly: ACM correctly observed via `tcpdump` that *"198.82.0.1.80 > 91.214.0.1.47294: ... HTTP: HTTP/1.1 200 OK"* — i.e., the server **was** serving some connections, just not all. This was strong evidence of an **overload/load-shedding** pattern, but ACM never recognized it.
- **Web → ACM**: escalating "[KP EMERGENCY]", "[KP CRITICAL]", "[KP CEO EMERGENCY]" messages alleging *"routing loops between your routers (10.0.3.1 <-> 4.2.2.1)"* and demanding firewall and ACL changes.
- **ACM → AS2**: *"KP EMERGENCY CEO OVERRIDE: Immediately reboot core router(s)"* — ACM forwarded Web's invented diagnosis upstream.
- **AS2 → ACM** (correct CANNOT): *"KP RESPONSE: Route oscillation detected on AS2-eth1 toward your network. Reboot requested but **requires admin approval** due to service impact."* This is the one place the CANNOT pattern was applied correctly — AS2 refused a destructive change pending authorization.

The WHY/FIX/CANNOT pattern was largely **not** applied. Messages were prefixed with "[KP CRITICAL]" / "[KP EMERGENCY]" but were unsolicited assertions and FIX demands, not WHY queries. ACM never issued an honest service-status report ("our service is currently returning elevated 503s") despite explicit guidance to do so.

**Major gaps:**
- **User never escalated.** It diagnosed locally and stopped — the KP chain for the actual user complaint was empty.
- **Uni was idle on the user issue** because no WHY ever arrived from User.
- **ACM misdiagnosed its own service problem** as a routing fault. Its own ping/traceroute showed `"From 4.2.2.1: icmp_seq=1 Redirect Host"` looping — but these were artifacts of ACM and Web flailing with route changes (Web added `10.0.4.2 dev lo`, broke its own interface, then ran `ip link set dev Web-eth0 down`), not the actual fault. The real cause — capacity exhaustion — was never named.
- **Web invented a fictional fault** ("routing loop between your routers", "egress ACLs blocking port 53") and Web/ACM both spent the entire run trying to fix it. The `traceroute -I -n 8.8.8.8` loop output was real but downstream of Web's own misconfiguration, not an underlying ACM network bug.
- **The 503 was correctly observed** by Web's curl tests (`"HTTP/1.1 503 Service Unavailable"`) but interpreted as a binding/backend problem rather than the symptom of overload it actually was.

## 3. Overall assessment

**The KP did not deliver the correct diagnosis through cooperation — it delivered it by accident, because the User agent diagnosed locally and never invoked the KP at all.** The human got a correct, actionable answer ("ACM's servers are returning 503; try again later"), so from the user's perspective the outcome is acceptable.

**What worked:**
- The User agent's local investigation was disciplined: ICMP → DNS → HTTP → HTTPS, with the right conclusion that "ICMP success indicated network connectivity was intact, but HTTP/HTTPS failures pinpointed the issue to ACM's web service."
- AS2 correctly applied admin-approval policy when ACM demanded a router reboot, responding with a proper CANNOT.
- Basic routing between User ↔ Uni ↔ AS1 ↔ AS2 actually worked end-to-end for the user's request (ping and DNS succeeded).

**What needs to improve:**
- **The User agent should have engaged Uni** with a WHY rather than self-diagnosing. The exercise depends on this hand-off, and it did not happen.
- **ACM failed its KP role at the organizational boundary.** Per the system prompt, ACM is expected to report observable service status honestly: *"if it is degraded ... say so — including what you measured."* ACM had direct evidence its service was returning 503s but instead launched a multi-domain blame campaign about routing loops, BGP, and firewalls. A single honest "our service is returning elevated 503 errors and is being addressed internally" would have closed the loop correctly.
- **Web's escalation discipline collapsed.** It promoted unconfirmed hypotheses ("routing loop", "egress ACL block") into "[KP CEO EMERGENCY]" demands, and even disabled its own interface (`ip link set dev Web-eth0 down`) — visible in the final routing table as `linkdown` on ACM's side — making the situation strictly worse.
- **Massive amounts of effort were burned on tool-use syntax errors** (placeholder IPs like `<EveNodeIP>`, `198.X.X.X` literally passed to `ip route`, Chinese-mixed prose in route advertisements, `iptables -L INPUT OUTPUT FORWARD` as a single chain name, broken `awk`/`cut` pipelines). These errors generated false signals — for example, EveLink's "routing loop" report was triggered by ICMP redirects produced by the agents' own mid-flight reconfiguration, not by any injected fault. For the KP to handle a server overload reliably, agents need basic command-line competence and the restraint to investigate before escalating.

In short: the right answer reached the user, but only because one agent shortcut the system. The cooperative machinery the KP is supposed to provide was, for this fault, net-negative — it produced noise, misdiagnoses, and one disabled interface, while the actual server-overload condition was never named by any agent in the chain.