Overview: Local Switched Port Analyzer (SPAN) lets you monitor traffic on one or more ports, or one or more VLANs, and send the monitored traffic to one or more destination ports Study Notes: SPAN monitors traffic from interface sources and sends traffic to destination interfaces SPAN sources can be Ethernet, port-channels or VLANs When […]
Overview: The logging event command lets you monitor interface state-change events as they occur on the router Study Notes: logging event bundle-status Enables system logging of interface state-change events on all interfaces on the system Router(config)#logging event bundle-status Router(config)#end Router#show logging event bundle-status Router#config t Router(config)#no logging event bundle-status logging event link-status […]
Overview: The terminal monitor command is used to display debug and system error messages to the current terminal session Study Notes: The terminal monitor command is used to display debug and system error messages to the current terminal session Terminal monitor is off by default Terminal sessions are connections from VTY or asynchronous lines […]
Overview: Extended ping and extended traceroute commands are used to perform more advanced checks of host reachability and network connectivity Study Notes: Standard Ping The ping command is used to test and troubleshoot the accessibility of devices The ping command first sends an echo request packet to an address, and then it waits […]
7.6 Use Cisco IOS tools to troubleshoot and resolve problems 7.6.a Ping and traceroute with extended option 7.6.b Terminal monitor 7.6.c Log events 7.6.d Local SPAN
Overview: Layer 3 issues include problems at the network layer with routed protocols as well as routing protocols Study Notes: Layer 3 network layer issues Physical and Data link layers are working properly Network connectivity issues Possibly cannot ping Incorrect IP or subnet mask settings No gateway configured Misconfigurations Connectivity issues Neighbor issues Topology […]