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

SNMP word in filter shows only SNMP messages

Capture -> options

Check settings

Update list realtime

Automatic scrolling

ethereal

Frame Details / Layers 1-7

Captured frames

Start new capture

Stop new capture

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