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Identify generic traffic-control faults — link bandwidth throttling, link packet corruption, incast traffic limitation. Use when tc qdisc output shows tbf or netem shaping on a network-path interface.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
Integration-test skill only. Invoke at the start of every troubleshooting session before other diagnostics to confirm the NIKA skill library is loaded.
Identify ACL and firewall faults from nftables or iptables rules. Use when traffic is selectively blocked by protocol or service (ARP, ICMP, HTTP, DNS, BGP, or packet-size filtering).
Reference list of signals that look suspicious but are normal testbed behavior. Consult before promoting any observation to a symptom.
Identify BGP routing faults — ASN misconfiguration, missing route advertisement, prefix hijacking, blackhole route leak. Use when reachability failures follow BGP-routed paths, BGP sessions fail to establish, or expected prefixes are missing from peers.
Parse oversized MCP tool output. When a tool returns "Output has been saved to <file>.txt" because the result exceeded Claude Code's token limit, run this skill's parser instead of re-reading the file in chunks. Covers `get_reachability` on large topologies and `service_snapshot` on labs with many published hostnames.
Identify DHCP server-side faults — service down, missing subnet declaration, spoofed gateway or DNS pushed by the server. Use when one or more hosts cannot obtain a lease, or hosts received DHCP-supplied values that look wrong.
| name | tc-fault-skill |
| description | Identify generic traffic-control faults — link bandwidth throttling, link packet corruption, incast traffic limitation. Use when tc qdisc output shows tbf or netem shaping on a network-path interface. |
link_bandwidth_throttling: a device interface owns a tbf shaping rule that caps throughput.link_high_packet_corruption: a netem corrupt rule randomly damages packets, so TCP retransmits and throughput collapses.incast_traffic_network_limitation: the qdisc stack combines netem and tbf, creating fan-in or queueing behavior that looks worse than a simple bandwidth cap.tc qdisc show reveals a non-default shaping stack on the implicated interface.tc_snapshot.py from diagnosis-methodology-skill/scripts to find non-default qdisc stacks before targeted tc checks.exec_shell(host_name="<host>", command="tc qdisc show dev <interface>")get_tc_statistics(host_name="<host>", intf_name="<interface>")exec_shell(host_name="<host>", command="tc -s qdisc show dev <interface>")get_tc_statistics always needs both host_name and intf_name.