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NMS LAB2

NMS LAB2. EXPENSES Software Hardware and OS for software Training Extra usage of work time (active use of SNMP -software etc.) New SNMP enabled Devices ?? if needed All most all recent manageable switches / routers support SNMP v1-2c, Some support SNMP V3. LAB2. SOFTWARE

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NMS LAB2

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  1. NMS LAB2 • EXPENSES • Software • Hardware and OS for software • Training • Extra usage of work time (active use of SNMP -software etc.) • New SNMP enabled Devices ?? if needed • All most all recent manageable switches / routers support SNMP v1-2c, Some support SNMP V3

  2. LAB2 • SOFTWARE • Many users, either web based or a client • MUST for a big network (help desk can have read only access to software) • Reduce of costs • Better availability for network • Usually your network is not used 24h/day • If you have online shop / order system with international users (Different time zone) then you might need 24h uptime

  3. LAB2 • AVAILIBILITY • SNMP -monitoring only affects to the time to detect faults • ONLY If you have redundant fans / power supplies / network devices then monitoring can prevent downtime

  4. LAB3 • Same network setup as lab2 • SNMP trap supports needs an additional command • Snmp-server host uuu.xxx.yyy.zzz traps public • Snmp-server enable traps snmp • SNMPc -program • Remember to check SNMP communities Both read & Write (choose router-> right click -> properties) • Additional network analyzer software (Ethereal) • Check ethereal settings (Next slides) • Use display Filter

  5. Ethereal • Basic settings edit -> Preferences • Check correct network interface • Check Update packets in realtime • Check Automatic scrolling

  6. ETHEREAL • Capture -> options • Check settings • Update list realtime • Automatic scrolling • Display Filters • SNMP word in filter shows only SNMP messages

  7. ethereal • Frame Details / Layers 1-7 • Start new capture • Stop new capture • Captured frames

  8. Frame details from IP –protocol level

  9. SNMP V3 In Cisco Devices • Not needed for lab • Auth • snmp-server group remotegroup v3 auth • snmp-server user remoteAuthUser remoteAuthGroup remote 16.20.11.14 v3 auth md5 • password1 • Priv & Auth • snmp-server group remotegroup v3 priv • snmp-server user remote PrivUser remotePrivGroup remote 16.20.11.14 v3 auth md5 • password1 priv des56 password2

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