Network Management CCNA 4 Chapter 7

Monitoring the Network Connection monitoring takes place every day when users log on Ping only shows that the connection is down, not where it is down Traffic monitoring is a more sophisticated method of network monitoring: –Microsoft Windows NT Network Monitor and Fluke's Network Analyser –Detect failing equipment, and determine if a component is overloaded or poorly configured

SNMP Simple Network Management Protocol Gathers data and organizes it so it is useful to centralized network administrator Manipulates and controls data from the network MIB database resides on each device managed Agents can be routers, switches or hubs that communicate with the console (polling or trapping)

RMON Remote Monitoring Extensions to SNMP, looks at the network as a whole An RMON probe is located on each segment of network being monitored Redundancy and distributed management SNMP is still required for RMON to operate on a network

Tool Troubleshooting Networks Troubleshooting methods include: –Process of Elimination –Divide and Conquer Software tools include: UseMain Options Verify basic connection -n sets the number of packets (default 5) Track packets by hops -j specifies loose source route; -h max hops Layer 7 connectivity View protocol statistics -s -p tcp shows TCP protocol statistics Map IP to MAC address -a show contents of cache; -s add static entry View hosts IP settings /all ; /renew requests a new DHCP lease Tool ping tracert telnet netstat arp ipconfig

Problem Solving Stages