-
Systematic troubleshooting is one of the most important tasks of a network administrator, as modern services require a highly available network structure (24/7) and errors cause considerable follow-up costs. In this course, troubleshooting models are first introduced with regard to efficient troubleshooting and their benefits are demonstrated. Typical faults are then simulated and rectified in a test network, using real systems (Catalyst switches, Cisco routers, computers/servers) and a high proportion of labs characterize this course. The methods learned can be applied to your own network and can be used directly to optimize operating procedures and processes such as an operating manual.
-
Course Contents
-
- Troubleshooting models and their efficient use
- CLI commands and templates for troubleshooting
- Management tools and baselining
- Tools from the manufacturer Cisco Systems
- Troubleshooting for Ethernet and switching in the LAN
- Troubleshooting for redundant Layer 2 protocols
- Troubleshooting for inter-VLAN routing
- Troubleshooting routing protocols (static routes, OSPF, BGP)
- Troubleshooting on the WAN connection and site coupling
- Troubleshooting QoS
- Troubleshooting IPv6 in dual-stack operation
- Outlook on future solutions and SDN-based tools
The detailed digital documentation package, consisting of an e-book and PDF, is included in the price of the course.
Premium Course Documents
In addition to the digital documentation package, the exclusive Premium Print Package is also available to you.
- High-quality color prints of the ExperTeach documentation
- Exclusive folder in an elegant design
- Document pouch in backpack shape
- Elegant LAMY ballpoint pen
- Practical notepad
The Premium Print Package can be added during the ordering process for € 200,- plus VAT (only for classroom participation).
-
Target Group
-
The course is aimed at network administrators whose tasks include troubleshooting in classic LAN structures with Cisco routers and switches.
-
Knowledge Prerequisites
-
The course assumes comprehensive knowledge of Cisco switches and routers as well as the protocols used in the IP world. Due to the very lab-heavy exercises, only the errors, the symptoms that occur in the network and their causes are discussed.
A good preparation is the course Cisco Routing & Switching in the Enterprise - The compact introduction to the IOS-XE
| 1 | Die Herangehensweise beim Troubleshooting |
| 1.1 | Troubleshooting |
| 1.1.1 | Systematische Fehlersuche ... |
| 1.1.2 | Netzwerkdokumentation |
| 1.2 | Die systematische Fehlereingrenzung |
| 1.2.1 | Troubleshooting-Modelle |
| 1.2.2 | Baselining |
| 1.3 | Hardware-Troubleshooting |
| 1.3.1 | Boot-Probleme |
| 1.3.2 | CPU-Auslastung |
| 1.3.3 | Crashinfo |
| 1.4 | Monitoring und Debugging |
| 1.5 | Troubleshooting Tools |
| 1.5.1 | Archive-Kommando |
| 1.6 | Embedded Packet Capture |
| 1.7 | Generic Online Diagnostics (GOLD) |
| 2 | Der Grundzustand und Netzwerkmanagement |
| 2.1 | Die Topologie im Netz |
| 2.2 | Endgeräte im Testnetz |
| 2.3 | Spanning Tree im LAN |
| 2.4 | Die IP-Struktur |
| 2.4.1 | Der Core-Bereich |
| 2.4.2 | Der Provider-Bereich |
| 2.4.3 | Messung von Umschaltzeiten im Subsekundenbereich |
| 2.5 | Anwendungen im Testnetz |
| 2.6 | Aufgabe: Formatierte Ausgaben |
| 2.6.1 | Aufgabe: Skript mit Befehlen für eine Baseline (LAN, WAN, Dienste) |
| 2.6.2 | Aufgabe: Skript mit Befehlen für eine Baseline (Routing, WAN) |
| 2.7 | Hilfsfunktionen der PCs |
| 2.7.1 | Tools für PCs |
| 3 | Fehler in lokalen Netzwerken |
| 3.1 | Ethernet Troubleshooting |
| 3.1.1 | Übersicht über Interfaces |
| 3.1.2 | Interface Counter |
| 3.1.3 | CDP-Fehleranalyse und Sicherheitsrisiken |
| 3.1.4 | Error-Disable State |
| 3.1.5 | Aufgabe: Error-Disable mit Storm-Control |
| 3.1.6 | Time Domain Reflectometry (TDR) |
| 3.1.7 | Digital Optical Monitoring (DOM) |
| 3.1.8 | Aufgabe: TDR-Messung |
| 3.1.9 | Duplex Mismatch |
| 3.1.10 | Trouble Ticket: Fehlersuche im LAN |
| 3.2 | Ethernet Switching Troubleshooting |
| 3.2.1 | Layer 2 Traceroute |
| 3.2.2 | Port Security |
| 3.3 | Virtuelle LANs |
| 3.3.1 | Trouble Ticket: Fehlersuche VLANs |
| 3.4 | Spanning-Tree Troubleshooting |
| 3.4.1 | Switching Loops |
| 3.4.2 | Aufgabe: Analyse eines Loops |
| 3.4.3 | Trouble Ticket: Fehlersuche im PVST |
| 3.4.4 | Trouble Ticket: Migration zu MSTP |
| 3.5 | EtherChannel |
| 3.5.1 | Trouble Ticket: Fehlersuche zu EtherChanneln |
| 3.6 | Encapsulation Mismatch |
| 3.6.1 | Trouble Ticket: Fehlersuche zu Access und Trunk Ports |
| 4 | Troubleshooting im WAN |
| 4.1 | Troubleshooting von VPNs |
| 4.2 | Konfiguration von IPsec/IKEv1 |
| 4.2.1 | Monitoring – Was gibt es zu sehen? |
| 4.2.2 | Migration auf IKEv2 |
| 4.2.3 | IKEv2 Monitoring |
| 4.2.4 | Fehlersuche: Debugging |
| 4.3 | Fragmentierung |
| 4.3.1 | Maximum Transfer Unit (MTU) testen |
| 4.3.2 | Trouble Ticket: Fehlersuche bei IPsec |
| 4.4 | PPP – Das Point-to-Point Protocol |
| 4.4.1 | LCP und NCP |
| 4.4.2 | Die Basiskonfiguration |
| 4.4.3 | PPP-Authentisierung |
| 4.4.4 | Die Kontrolle: PPP Monitoring |
| 4.4.5 | Trouble Ticket: Fehlersuche bei PPP |
| 5 | Troubleshooting IP und Routing |
| 5.1 | IP-Adressierung und IP-Netze |
| 5.1.1 | Aufgabe: Duplicate IP, Discontigous Networks |
| 5.1.2 | DHCP-Fehler |
| 5.1.3 | DHCP Snooping zur Fehlersuche |
| 5.1.4 | Trouble Ticket: DHCP |
| 5.1.5 | Dynamic ARP Inspection - DAI |
| 5.1.6 | IP Source Guard |
| 5.1.7 | IP Device Tracking (IPDT) |
| 5.1.8 | Aufgabe: Sicherung des Switchports |
| 5.2 | Das Default Gateway |
| 5.3 | Gateway Redundanz mit FHRP |
| 5.3.1 | Trouble Ticket: HSRP |
| 5.3.2 | VRRP- Die Konfiguration |
| 5.3.3 | Trouble Ticket: VRRP |
| 5.4 | IP Routing |
| 5.4.1 | Typische Vorgehensweise bei einem Fehler in der Wegewahl |
| 5.4.2 | Cisco Express Forwarding (CEF) |
| 5.4.3 | Aufgabe: Routing Loop |
| 5.4.4 | OSPF-Grundkonfiguration |
| 5.4.5 | Trouble Ticket: OSPF Basiskonfiguration |
| 5.4.6 | Trouble Ticket: OSPF Optimierungen |
| 5.4.7 | IS-IS-Routing |
| 5.5 | BGP Troubleshooting |
| 5.5.1 | Trouble Ticket: BGP |
| 5.5.2 | Route Summarization |
| 5.5.3 | Aufgabe: Route Summarization |
| 5.5.4 | Redistribution von Routen |
| 5.5.5 | Route Maps |
| 5.5.6 | Trouble Ticket: Route Redistribution |
| 5.6 | IP Multicasting |
| 5.6.1 | Probleme IGMP |
| 5.6.2 | Probleme PIM |
| 5.6.3 | Multicast Troubleshooting Tools |
| 5.6.4 | Trouble Ticket: IP Multicasting |
| 5.7 | MPLS-Netze |
| 5.7.1 | LDP-Grundkonfiguration |
| 5.7.2 | LDP-Monitoring |
| 5.7.3 | Aufgabe und Trouble Ticket: MPLS |
| 5.7.4 | MPLS VPNs |
| 5.7.5 | Troubleshooting der Routen-Verteilung bei L3 MPLS VPNs |
| 5.7.6 | Aufgabe und Trouble Ticket: MPLS VPNs |
| 5.8 | ACL-Fehleranalyse |
| 5.8.1 | Troubleshooting Access-Listen |
| 5.8.2 | Logging |
| 5.9 | NAT- und PAT-Fehleranalyse |
| 5.9.1 | Besonderheiten bei NAT |
| 5.9.2 | Trouble Ticket: NAT |
| 6 | Fehler auf der Anwendungsschicht |
| 6.1 | Anwendungen testen |
| 6.1.1 | Aufgabe: Dienste im Netz mit Telnet prüfen |
| 6.2 | DNS – Namen statt IP-Adressen |
| 6.2.1 | Trouble Ticket: DNS |
| 6.3 | DHCP-Protokoll |
| 6.4 | TFTP und FTP |
| 6.4.1 | Troubleshooting FTP |
| 6.4.2 | Troubleshooting TFTP |
| 6.5 | SSH – Die Secure Shell |
| 6.5.1 | Troubleshooting SSH |
| 6.5.2 | Trouble Ticket: SSH |
| 6.6 | HTTP und HTTPS |
| 6.6.1 | Troubleshooting HTTP |
| 6.6.2 | Trouble Ticket: Access-Listen |
| 6.7 | SNMP zur Netzüberwachung |
| 6.7.1 | Management via SNMP |
| 6.7.2 | SNMP Traps und Syslog Logging |
| 6.8 | NTP und Zeitstempel |
| 6.8.1 | Trouble Ticket: NTP |
| 6.9 | Quality of Service |
| 6.9.1 | Warum QoS? |
| 6.9.2 | Werkzeuge im QoS |
| 6.9.3 | Queueing |
| 6.9.4 | QoS auf den IOS-XE Switches |
| 6.9.5 | QoS auf dem 4451 Router |
| 6.9.6 | Trouble Ticket: QoS im LAN und WAN |
| 6.10 | Schutz der Control Plane bei Cisco |
| 6.11 | Hardware-nahe Fehler |
| 6.11.1 | Der ROMMON |
| A | Cisco Troubleshooting in Enterprise-Netzen Übungen und Aufgaben |
| A.1 | Zugriff auf den Terminal Server |
| A.2 | Das Testnetz |
| A.3 | Baseline: Grundzustand des Netzwerks |
| A.4 | Trouble Tickets, Dokumentation, Tools |
| A.5 | Trouble Ticket: Super Lab |
| B | Abkürzungsverzeichnis |
| C | Befehle |
-
Classroom training
- Do you prefer the classic training method? A course in one of our Training Centers, with a competent trainer and the direct exchange between all course participants? Then you should book one of our classroom training dates!
-
Online training
- You wish to attend a course in online mode? We offer you online course dates for this course topic. To attend these seminars, you need to have a PC with Internet access (minimum data rate 1Mbps), a headset when working via VoIP and optionally a camera. For further information and technical recommendations, please refer to.
-
Tailor-made courses
-
You need a special course for your team? In addition to our standard offer, we will also support you in creating your customized courses, which precisely meet your individual demands. We will be glad to consult you and create an individual offer for you.
You can find the complete description of this course with dates and prices ready for download at as PDF.-
Systematic troubleshooting is one of the most important tasks of a network administrator, as modern services require a highly available network structure (24/7) and errors cause considerable follow-up costs. In this course, troubleshooting models are first introduced with regard to efficient troubleshooting and their benefits are demonstrated. Typical faults are then simulated and rectified in a test network, using real systems (Catalyst switches, Cisco routers, computers/servers) and a high proportion of labs characterize this course. The methods learned can be applied to your own network and can be used directly to optimize operating procedures and processes such as an operating manual.
-
Course Contents
-
- Troubleshooting models and their efficient use
- CLI commands and templates for troubleshooting
- Management tools and baselining
- Tools from the manufacturer Cisco Systems
- Troubleshooting for Ethernet and switching in the LAN
- Troubleshooting for redundant Layer 2 protocols
- Troubleshooting for inter-VLAN routing
- Troubleshooting routing protocols (static routes, OSPF, BGP)
- Troubleshooting on the WAN connection and site coupling
- Troubleshooting QoS
- Troubleshooting IPv6 in dual-stack operation
- Outlook on future solutions and SDN-based tools
The detailed digital documentation package, consisting of an e-book and PDF, is included in the price of the course.
Premium Course Documents
In addition to the digital documentation package, the exclusive Premium Print Package is also available to you.
- High-quality color prints of the ExperTeach documentation
- Exclusive folder in an elegant design
- Document pouch in backpack shape
- Elegant LAMY ballpoint pen
- Practical notepad
The Premium Print Package can be added during the ordering process for € 200,- plus VAT (only for classroom participation).
-
Target Group
-
The course is aimed at network administrators whose tasks include troubleshooting in classic LAN structures with Cisco routers and switches.
-
Knowledge Prerequisites
-
The course assumes comprehensive knowledge of Cisco switches and routers as well as the protocols used in the IP world. Due to the very lab-heavy exercises, only the errors, the symptoms that occur in the network and their causes are discussed.
A good preparation is the course Cisco Routing & Switching in the Enterprise - The compact introduction to the IOS-XE
| 1 | Die Herangehensweise beim Troubleshooting |
| 1.1 | Troubleshooting |
| 1.1.1 | Systematische Fehlersuche ... |
| 1.1.2 | Netzwerkdokumentation |
| 1.2 | Die systematische Fehlereingrenzung |
| 1.2.1 | Troubleshooting-Modelle |
| 1.2.2 | Baselining |
| 1.3 | Hardware-Troubleshooting |
| 1.3.1 | Boot-Probleme |
| 1.3.2 | CPU-Auslastung |
| 1.3.3 | Crashinfo |
| 1.4 | Monitoring und Debugging |
| 1.5 | Troubleshooting Tools |
| 1.5.1 | Archive-Kommando |
| 1.6 | Embedded Packet Capture |
| 1.7 | Generic Online Diagnostics (GOLD) |
| 2 | Der Grundzustand und Netzwerkmanagement |
| 2.1 | Die Topologie im Netz |
| 2.2 | Endgeräte im Testnetz |
| 2.3 | Spanning Tree im LAN |
| 2.4 | Die IP-Struktur |
| 2.4.1 | Der Core-Bereich |
| 2.4.2 | Der Provider-Bereich |
| 2.4.3 | Messung von Umschaltzeiten im Subsekundenbereich |
| 2.5 | Anwendungen im Testnetz |
| 2.6 | Aufgabe: Formatierte Ausgaben |
| 2.6.1 | Aufgabe: Skript mit Befehlen für eine Baseline (LAN, WAN, Dienste) |
| 2.6.2 | Aufgabe: Skript mit Befehlen für eine Baseline (Routing, WAN) |
| 2.7 | Hilfsfunktionen der PCs |
| 2.7.1 | Tools für PCs |
| 3 | Fehler in lokalen Netzwerken |
| 3.1 | Ethernet Troubleshooting |
| 3.1.1 | Übersicht über Interfaces |
| 3.1.2 | Interface Counter |
| 3.1.3 | CDP-Fehleranalyse und Sicherheitsrisiken |
| 3.1.4 | Error-Disable State |
| 3.1.5 | Aufgabe: Error-Disable mit Storm-Control |
| 3.1.6 | Time Domain Reflectometry (TDR) |
| 3.1.7 | Digital Optical Monitoring (DOM) |
| 3.1.8 | Aufgabe: TDR-Messung |
| 3.1.9 | Duplex Mismatch |
| 3.1.10 | Trouble Ticket: Fehlersuche im LAN |
| 3.2 | Ethernet Switching Troubleshooting |
| 3.2.1 | Layer 2 Traceroute |
| 3.2.2 | Port Security |
| 3.3 | Virtuelle LANs |
| 3.3.1 | Trouble Ticket: Fehlersuche VLANs |
| 3.4 | Spanning-Tree Troubleshooting |
| 3.4.1 | Switching Loops |
| 3.4.2 | Aufgabe: Analyse eines Loops |
| 3.4.3 | Trouble Ticket: Fehlersuche im PVST |
| 3.4.4 | Trouble Ticket: Migration zu MSTP |
| 3.5 | EtherChannel |
| 3.5.1 | Trouble Ticket: Fehlersuche zu EtherChanneln |
| 3.6 | Encapsulation Mismatch |
| 3.6.1 | Trouble Ticket: Fehlersuche zu Access und Trunk Ports |
| 4 | Troubleshooting im WAN |
| 4.1 | Troubleshooting von VPNs |
| 4.2 | Konfiguration von IPsec/IKEv1 |
| 4.2.1 | Monitoring – Was gibt es zu sehen? |
| 4.2.2 | Migration auf IKEv2 |
| 4.2.3 | IKEv2 Monitoring |
| 4.2.4 | Fehlersuche: Debugging |
| 4.3 | Fragmentierung |
| 4.3.1 | Maximum Transfer Unit (MTU) testen |
| 4.3.2 | Trouble Ticket: Fehlersuche bei IPsec |
| 4.4 | PPP – Das Point-to-Point Protocol |
| 4.4.1 | LCP und NCP |
| 4.4.2 | Die Basiskonfiguration |
| 4.4.3 | PPP-Authentisierung |
| 4.4.4 | Die Kontrolle: PPP Monitoring |
| 4.4.5 | Trouble Ticket: Fehlersuche bei PPP |
| 5 | Troubleshooting IP und Routing |
| 5.1 | IP-Adressierung und IP-Netze |
| 5.1.1 | Aufgabe: Duplicate IP, Discontigous Networks |
| 5.1.2 | DHCP-Fehler |
| 5.1.3 | DHCP Snooping zur Fehlersuche |
| 5.1.4 | Trouble Ticket: DHCP |
| 5.1.5 | Dynamic ARP Inspection - DAI |
| 5.1.6 | IP Source Guard |
| 5.1.7 | IP Device Tracking (IPDT) |
| 5.1.8 | Aufgabe: Sicherung des Switchports |
| 5.2 | Das Default Gateway |
| 5.3 | Gateway Redundanz mit FHRP |
| 5.3.1 | Trouble Ticket: HSRP |
| 5.3.2 | VRRP- Die Konfiguration |
| 5.3.3 | Trouble Ticket: VRRP |
| 5.4 | IP Routing |
| 5.4.1 | Typische Vorgehensweise bei einem Fehler in der Wegewahl |
| 5.4.2 | Cisco Express Forwarding (CEF) |
| 5.4.3 | Aufgabe: Routing Loop |
| 5.4.4 | OSPF-Grundkonfiguration |
| 5.4.5 | Trouble Ticket: OSPF Basiskonfiguration |
| 5.4.6 | Trouble Ticket: OSPF Optimierungen |
| 5.4.7 | IS-IS-Routing |
| 5.5 | BGP Troubleshooting |
| 5.5.1 | Trouble Ticket: BGP |
| 5.5.2 | Route Summarization |
| 5.5.3 | Aufgabe: Route Summarization |
| 5.5.4 | Redistribution von Routen |
| 5.5.5 | Route Maps |
| 5.5.6 | Trouble Ticket: Route Redistribution |
| 5.6 | IP Multicasting |
| 5.6.1 | Probleme IGMP |
| 5.6.2 | Probleme PIM |
| 5.6.3 | Multicast Troubleshooting Tools |
| 5.6.4 | Trouble Ticket: IP Multicasting |
| 5.7 | MPLS-Netze |
| 5.7.1 | LDP-Grundkonfiguration |
| 5.7.2 | LDP-Monitoring |
| 5.7.3 | Aufgabe und Trouble Ticket: MPLS |
| 5.7.4 | MPLS VPNs |
| 5.7.5 | Troubleshooting der Routen-Verteilung bei L3 MPLS VPNs |
| 5.7.6 | Aufgabe und Trouble Ticket: MPLS VPNs |
| 5.8 | ACL-Fehleranalyse |
| 5.8.1 | Troubleshooting Access-Listen |
| 5.8.2 | Logging |
| 5.9 | NAT- und PAT-Fehleranalyse |
| 5.9.1 | Besonderheiten bei NAT |
| 5.9.2 | Trouble Ticket: NAT |
| 6 | Fehler auf der Anwendungsschicht |
| 6.1 | Anwendungen testen |
| 6.1.1 | Aufgabe: Dienste im Netz mit Telnet prüfen |
| 6.2 | DNS – Namen statt IP-Adressen |
| 6.2.1 | Trouble Ticket: DNS |
| 6.3 | DHCP-Protokoll |
| 6.4 | TFTP und FTP |
| 6.4.1 | Troubleshooting FTP |
| 6.4.2 | Troubleshooting TFTP |
| 6.5 | SSH – Die Secure Shell |
| 6.5.1 | Troubleshooting SSH |
| 6.5.2 | Trouble Ticket: SSH |
| 6.6 | HTTP und HTTPS |
| 6.6.1 | Troubleshooting HTTP |
| 6.6.2 | Trouble Ticket: Access-Listen |
| 6.7 | SNMP zur Netzüberwachung |
| 6.7.1 | Management via SNMP |
| 6.7.2 | SNMP Traps und Syslog Logging |
| 6.8 | NTP und Zeitstempel |
| 6.8.1 | Trouble Ticket: NTP |
| 6.9 | Quality of Service |
| 6.9.1 | Warum QoS? |
| 6.9.2 | Werkzeuge im QoS |
| 6.9.3 | Queueing |
| 6.9.4 | QoS auf den IOS-XE Switches |
| 6.9.5 | QoS auf dem 4451 Router |
| 6.9.6 | Trouble Ticket: QoS im LAN und WAN |
| 6.10 | Schutz der Control Plane bei Cisco |
| 6.11 | Hardware-nahe Fehler |
| 6.11.1 | Der ROMMON |
| A | Cisco Troubleshooting in Enterprise-Netzen Übungen und Aufgaben |
| A.1 | Zugriff auf den Terminal Server |
| A.2 | Das Testnetz |
| A.3 | Baseline: Grundzustand des Netzwerks |
| A.4 | Trouble Tickets, Dokumentation, Tools |
| A.5 | Trouble Ticket: Super Lab |
| B | Abkürzungsverzeichnis |
| C | Befehle |
-
Classroom training
- Do you prefer the classic training method? A course in one of our Training Centers, with a competent trainer and the direct exchange between all course participants? Then you should book one of our classroom training dates!
-
Online training
- You wish to attend a course in online mode? We offer you online course dates for this course topic. To attend these seminars, you need to have a PC with Internet access (minimum data rate 1Mbps), a headset when working via VoIP and optionally a camera. For further information and technical recommendations, please refer to.
-
Tailor-made courses
-
You need a special course for your team? In addition to our standard offer, we will also support you in creating your customized courses, which precisely meet your individual demands. We will be glad to consult you and create an individual offer for you.
You can find the complete description of this course with dates and prices ready for download at as PDF.