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Capitolo 11

Capitolo 11. Gestione di rete e ricerca guasti. Network management protocol. 1. Managing Entity. 2. Query. 3. Agent. MIB. Response. Network Management Station. Managed Device (per esempio router). Tipo oper. 1 ottetto. variabile. variabile. variabile. variabile. variabile.

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Capitolo 11

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  1. Capitolo 11 Gestione di rete e ricerca guasti

  2. Network management protocol 1 Managing Entity 2 Query 3 Agent MIB Response Network Management Station Managed Device (per esempio router)

  3. Tipo oper. 1 ottetto variabile variabile variabile variabile variabile variabile Nome Nome Nome Valore Valore Valore

  4. B A t1 t2 Collisione PREAM. SFD DSAP SSAP LEN. LLC PDU PAD FCS Collision Window 512 bit-time

  5. SQE Test 500 ns Minimo 1500 ns Nominale PACCHETTO 600 ns min. deve finire entro 3000 ns

  6. PREAM. PREAM. PREAM. SFD SFD SFD DSAP DSAP DSAP SSAP SSAP SSAP LEN. LEN. tYPE LLC PDU DATA LLC PDU PAD PAD PAD FCS FCS FCS DSAP SSAP LEN. LLC PDU PAD FCS

  7. PREAM. SFD DSAP SSAP LEN. LLC PDU PAD FCS BPDU: Root Identifier = 7D00.00E01E3E28AC BPDU: Priority = 7D00 BPDU: MAC Address = 00E01E3E28AC BPDU: BPDU: Root Path Cost = 500 BPDU: ...

  8. guasto PREAM. SFD DSAP SSAP LEN. LLC PDU PAD FCS

  9. PREAM. PREAM. PREAM. PREAM. SFD SFD SFD SFD DSAP DSAP DSAP DSAP SSAP SSAP SSAP SSAP LEN. LEN. LEN. LEN. LLC PDU LLC PDU LLC PDU LLC PDU PAD PAD PAD PAD FCS FCS FCS FCS LAN Analyzer Primo indirizzo del primo lotto di indirizi MAC di: IBM Digital Equipment SUN Microsystem 08-00-5A-00-00-01 08-00-2B-00-00-01 08-00-20-00-00-01 50 40 60 30 70 20 80 10 90 1 100

  10. Mirror port R LAN Analyzer LAN Analyzer

  11. Raccolta di informazioni Analisi Test e verifiche Causa e soluzione

  12. Con quale frequenza? Da quando? In quali condizioni? Dove? 50 40 60 2002 30 70 Particolarità collegate all’evento? 20 80 Come si manifesta? 10 90 1 100

  13. Cavo a 4 coppie ritorte Piattina a 8 conduttori Connettore RJ45 Incisione della guaina Taglio del cavo Pinzatura del connettore RJ45

  14. Contatto a lama per conduttore a trefoli Contatto a forcella per conduttore solido

  15. 1 2 3 4 5 6 7 8 Chiavetta in basso Marrone Arancio Bianco-Arancio Bianco-Marrone Bianco-Verde Blu Verde Bianco-Blu

  16. 1 2 3 4 5 6 7 8 Chiavetta in basso Marrone BLU Bianco-Marrone Bianco-Arancio Arancio Bianco-Verde Bianco-Blu Verde

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