SP Management: Okay, I’m tired this week so instead of launching into iBGP, eBGP, filtering, summarisation and redistribution, to keep the mind from going numb I headed for one of my diversionary tactics, SP Management. These are areas which I have a real interest in thus re-energising the batteries.
Loads here and all good – RMON, SNMP, Netflow, NTP, Accounting, Syslog – Let’s stick with CCO for our references, forget 12.3 or 12.4T, 12.2 is the place to be for SP RMON, NTP, Logging & SNMP. – http://www.cisco.com/en/US/docs/ios/12_2/configfun/command/reference/frf012.html
Here’s my ‘in a nutshell’ notes:
RMON – is used to create event driven SNMP traps based on MIB’s that a cisco device supports. RMON is made up of two sections, the first being an event and the second the alarm. Alarms are what occur on the router i.e. an increase/decrease in a MIB value. An RMON alarm is defined by issuing the rmon alarm global configuration command, and tracks the value of a MIB based on the delta (relative change) of the variable, or the absolute change of the variable. RMON can be used to track interface utilisation. [Thanks B*2!] The main commands are rmon alarm.. & rmon event.., verification involves sh rmon alarms & sh rmon events.
SNMP – is an application-layer protocol that provides a message format for communication between SNMP managers and agents. SNMP provides a standardised framework and a common language used for the monitoring and management of devices in a network. The SNMP framework has three parts: An SNMP manager, An SNMP agent, & a MIB. I will not get into traps and versions as you are, I’m sure, familiar with those, commands include snmp-server host …[to define the management station], snmp-server community [to define the community string], snmp-server enable traps [as the name suggest!], and a load of other snmp options such as location, contact, chassis-id, etc. Basically get dynamips up and running [or preferably a real router] and hit the tab button in global configuration mode for the full SP! [LOL!]
NTP – disabled on all interfaces by default – I will not re-invent the wheel here, head over to Ivan Pepelnjak’s article at NIL -> http://www.nil.com/ipcorner/BeOnTime/ – a great explanation of NTP – commands as outlined there are ->
ntp source Loopback0
ntp master 10
ntp server NTP-Server
ntp peer S2 source FastEthernet0/0
ntp server C1
Verification includes – show ntp status, show ntp associations
SP Management Part 2 with syslog, netflow, etc to follow………..