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07 UseCases

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Information about 07 UseCases
Education

Published on January 11, 2008

Author: Tirone

Source: authorstream.com

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Use cases:  Use cases Navigation Problem notification Problem analysis Navigation:  Navigation Navigations - Actions of finding specific data in the information system Efficient navigation and switching to relevant pages, following the logical analysis and troubleshooting process Navigation possibilities Browsing of the data hierarchy Search Access from the Graph Access from the Group of Monitors Access from Alerts and Event Log Access from the Trace box Browsing the network topology – Links box Access from the Object Navigation Path Access from the Recently Used list Problem notification:  Problem notification email – text describes the problem Actions: look at the RRD Chart Navigate to parent Object (port, device) Alerts – coloured in red Actions: look at the RRD Chart go to the Monitor go to parent Port/Device go to relevant Group Problem notification:  Problem notification Monitors Overview Group – coloured in red Actions: look at the adhering RRD Chart check the status of other Monitors go to the Monitor go to parent Port/Device go to relevant Group Problem notification:  Problem notification Event log – coloured alert level Actions: look at the adhering RRD Chart check the occurrences of this event go to the Monitor go to parent Port/Device go to relevant Group Problem notification:  Problem notification Graph weather map overview, "Explosion" – check the traffic link status overview, red arrow – check the port status Actions: if Port is marked with a red colour, double click the Port Trace link - click on the link check other RRD Charts go to the nearest port in relation to the NetIIS server identify the Location go to the Monitor go to parent Port/Device go to relevant Group Problem analysis:  Problem analysis Common problems: "Link failure" "Link is up, BGP is down" "BGP session is established, but there is no traffic" "Packet loss" "Increased packet rate'' Problem analysis:  Problem analysis "Link failure" Examine the global network status from the weather-map Navigate to the interface details Check the Port Monitor, the recent history on RRD Chart Show all events on Event Page Execute Looking Glass command show interface Following the link, go to the remote router page, check the remote interface status if it is accessible through the backup-link (if such exists) Problem analysis:  Problem analysis "Link is up, BGP is down" Navigate to the interface details Analyse recent history for BGP status (RRD Chart, Event log) Eexecute Looking Glass command show bgp summary Investigate the link quality by examining the Ping Monitor, the Traffic Monitor and the Packet Monitor Execute the Ping Monitor Check the system uptime on both end routers (for possible reload) Check the eventual intermediate points between the BGP peers (e.g. connection over MPLS). Problem analysis:  Problem analysis "BGP session is established, but there is no traffic" Navigate to the interface details Investigate the reachability and link quality by checking the Ping Monitor Execute Ping Monitor, Looking Glass command ping and traceroute to other devices/sites Analyse recent history for BGP status (RRD Chart, Event Log) Execute Looking Glass command show bgp summary and examine the column with the total BGP entries number (number of routes) Check the route table by Looking Glass command show ip route Problem analysis:  Problem analysis "Packet loss" Navigate to the interface details investigate the reachability and link quality through cross-checking with the Ping Monitor Execute the ping Looking Glass command Check the Traffic Monitor and the router utilization Monitors for possible link or router congestion Research recent history for BGP status, execute command show bgp summary and search for possible BGP flapping Examine the routes using the show ip route and traceroute Looking Glass commands for the remote address Problem analysis:  Problem analysis "Increased packet rate'‘ Navigate to the interface details Investigate Packet and Traffic Monitors Check the link quality using the Ping Monitor Execute the ping Looking Glass command Check the router utilization Monitors for possible router congestion (as a consequence of the problem) If a possible DDoS-attack is in progress, trace back the other interfaces investigating the Packet/Traffic Monitors and try to locate the source of traffic Check NetFlow tools, if such are available Use cases Summary:  Use cases Summary Navigation Problem notification Problem analysis

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