PRoblem solving Model Define the problem Gather the facts Consider the possibilities Create an action plane Implement the action plan Observe the result Repeat the problem solving process Resolve the problem
show buffers: hits: sUCcesful attempts to allocate a buffer misses: allocation attempts the results in alloacting new buffer (must be low) trims: buffer released becouse not used
show controller cxbus: shows the allocation of the buffers at router startup
show controller [interface]: display memory management and error countersfor interfaces internal controller counts
show memory [free]: IO memory free: should be great
show processes: to find process that require a lot of cpu runtime: cpu time the process has used invoked: number of time the process has been invoked usecs: cpu time for each process invocation
show process memory: to find the memory allocated from each process
show stacks: snapshot of the stacks
(confg)# exception dump: force creation af a core dump when the next crash occurs
DEBUG TCP/ip ping trace show ip access-list show ip arp show ip interface [brief] show ip ospf database show ip ospf interface show ip protocols show ip route [summary] show ip traffic <--------------- debug ip eigrp debug ip icmp debug ip ospf events debug ip packet debug ip rip debug arp
DEBUG NETWARE ping ipx show ipx eigrp topology show ipx interface show ipx nlsp database show ipx route show ipx servers show ipx traffic debug ipx ipxwan (ipx on wan interface) debug ipx packet debug ipx routing debug ipx sap SAP: Service Advertising Protocol to broadcast and discover network services NCP: Network Core Protocol connection oriented protocl alternative to spx (layer 5,6) IPX/SPX
DEBUG APPLETALK show appletalk acsess-list show appletalk adjacent-routes (network directly connected) show appletalk arp show appletalk global (appletalk router information) show appletalk interface show appletalk name-cache show appletalk route show appletalk traffic show appletalk nbp show appletalk zone debug apple arp debug apple errors debug apple events debug apple nbp debug apple packet debug apple routing (RTMP output) debug apple zip NBP: Name Binding Protocol (layer 4) RTMP: Routing Table Maintenance Protocol (layer 4) ZIP: Zone Information Protocol (layer 5) DDP: Datagram Delivery Protocol (layer 3) ATP: AppleTalk Transfer Protocol (layer 4) AEP: AppleTalk Echo Protocol (layer 4) ADSP: AppleTalk Data Stream Protcol (layer 5)
DEBUG SWITCHING show system show test show interface show log show mac show module show port show config show span show trunk show spantree [vlan][statistics] show vtp domain show vlan debug vlan packet debug span SPAN: mirror flow data from a port to another to the designated span port VTP: Vlan Trunking Protocol, layer 2 multicast messaging protocol that allows vlan classification
DEBUG FRAME RELAY show frame-relay lmi: lmi statistics show frame-relay map: check dlci to layer 3 map and info about connections show frame-relay pvc: lmi status of each dlci debug serial interface debug frame-relay lmi debug frame-relay events debug frame-relay packet LMI: Local Management Interface (Cisco, Ansi, ITU q933a) FECN: Forward EXPlicit Congestion Notification BECN: Backward Explicit Congestion Notification DE: Discard Eligibility
DEBUG ISDN show interface bri show controllers bri show isdn status show dialer show ppp multilink debug bri debug isdn q921 debug isdn q321 debug ppp authentication debug ppp negotiation debug dialer
