1, the network troubleshooting Overview
Summary troubleshooting network problems: a general understanding of network failure classification, be understood that a network failure troubleshooting steps;
common diagnostic tools: ping command, tracert command, the display, debugging commands, reset commands;
troubleshooting repeat method: layered troubleshooting method, block troubleshooting, troubleshooting segment, replacement troubleshooting;
understanding of a network failure requires maintenance personnel, resource acquisition route network troubleshooting.
2, physical layer and WAN troubleshooting
WAN physical layer troubleshooting: master troubleshooting methods of the physical layer WAN
PPP protocol Troubleshooting: negotiation process, the PPP PPP protocol configuration, PPP protocol common to exclude common diagnostic method, PPP protocol command, PPP protocol case to explain;
PPPOE agreement Troubleshooting: PPPOE two stages, PPPOE configuration, PPPOE troubleshooting methods to explain.
3, and the Ethernet physical layer troubleshooting
enable flow switch devices: bootrom introduction, upgrading, troubleshooting and power interfaces;
the MAC address learning troubleshooting: MAC address of description, MAC address learning common fault, MAC address drift troubleshooting;
the VLAN Troubleshooting protocol: introduce three interface types (access, trunk, hybrid), VLAN, super vlan, pvlan who introduced common faults VLAN protocol troubleshooting, analysis of typical cases;
link aggregation Troubleshooting: static aggregation and dynamic aggregation Profile , link aggregation exclusion method;
the STP protocol troubleshooting: MSTP protocol description, the MSTP common faults and troubleshooting, troubleshooting command protocol describes the MSTP, typical cases;
the Smart-link protocol Troubleshooting: Smart-link protocol description, the configuration, the common troubleshooting;
packet forwarding classes troubleshooting, maintenance commands commonly used Ethernet introduction.
4, routing protocol troubleshooting
RIP Troubleshooting: master RIP troubleshooting related ideas, able to skillfully use of RIP-related fault display, debugging commands, can be RIP typical case analysis based on the characteristics combined with the RIP from the amount of routing protocol-related knowledge;
OSPF Troubleshooting: master the relevant troubleshooting OSPF thinking, able to skillfully use related to OSPF fault display, debugging commands to master OSPF fault analysis method. OSPF-related master agreement and applied in OSPF troubleshooting;
BGP Troubleshooting: Mastering BGP troubleshooting related ideas, able to skillfully use related to the BGP fault display, debugging commands to master BGP typical fault analysis method. BGP-related master agreement and applied to exclude the fault of BGP.
5, network application troubleshooting
ACL Troubleshooting: master the basic working principle ACL, combined with troubleshooting ideas, use of relevant troubleshooting command of ACL common fault exclusion;
NAT Troubleshooting: master NAT common troubleshooting thinking, use of relevant Troubleshooting commands for NAT common fault exclusion;
VRRP Troubleshooting: master the basic working principle of VRRP, combined with troubleshooting ideas, use of relevant troubleshooting commands VRRP common fault exclusion;
DHCP Troubleshooting: master network device as a DHCP server, DHCP relay, DHCP Snooping basic working principle, combined with the fault, using the relevant commands to troubleshoot a DHCP server, a common fault DHCP relay, DHCP Snooping be excluded.
6, VPN Troubleshooting
GRE Troubleshooting: master the basic working principle of the GRE, the GRE common faults. Combined with the fault, using the relevant commands to troubleshoot common GRE faults exclusion;
L2TP Troubleshooting: L2TP grasp the principle and common faults. Combined with the fault, using the relevant command to L2TP troubleshooting common faults exclusion;
Foundations of Cryptography: confidentiality, integrity, authentication complete description;
IKE and IPSec Troubleshooting: master the basic working principle of IKE and IPSec, combined with a failure exclusion of ideas, use of relevant troubleshooting commands IKE and IPSec common fault exclusion;
VPN integrated technical Troubleshooting: master the application of the integrated VPN technology such as GRE over IPSec, IPSec NAT and the like. Combined with the fault, using the relevant commands for troubleshooting IPSec NAT traversal, Troubleshooting IPSec high-reliability networking were excluded.
7, actual experiments explain the simulation of large integrated
with the above techniques, practical exercise, and outputs the actual report (contains: Symptom, failure analysis mode, fault handling method and the like)
Extending Content: "Network troubleshooting Practice"
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