Transcript 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 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 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 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 Ethereal Basic settings edit -> Preferences Check correct network interface Check Update packets in realtime Check Automatic scrolling ETHEREAL Display Filters Capture -> options Check settings Update list realtime Automatic scrolling SNMP word in filter shows only SNMP messages ethereal Start new capture Stop new capture Captured frames Frame Details / Layers 1-7 Frame details from IP –protocol level 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