Newbie to OID/MIB - sh int s0/0 which one ????

[rickd12345]

Hi all,

I am relatively new to OID's and MIB's and am looking for a little bit of advice please.

Basically, I want to monitor the output of the top line of a "sh int s0/0",

i.e

serial0/0 is up, line protocol is up

I am looking to monitor this command to see when a leeased line fails. I have an application which will test the OID at regular intervals but I cant find the right OID to use. The router I want to use it with is a 2620XM.

Can anyone point me in the right direction and is what I am asking possible ?

Will a line failure actual show in an OID and then trigger an alert, has anyone done this before ?

many thanks

Richard

[Rodney-roberts]

Richard

i hope this helps, i pulled the info off my solarwinds mib viewer.

OID 1.3.6.1.2.1.2.2.1.7.1

Type INTEGER

Units

Access read-write

Status unknown

Value 1

up(1)

The desired state of the interface. The testing(3) state

indicates that no operational packets can be passed. When a

managed system initializes , all interfaces start with

ifAdminStatus in the down(2) state. As a result of either

explicit management action or per configuration information

retained by the managed system , ifAdminStatus is then

changed to either the up(1) or testing(3) states (or remains

in the down(2) state).

[Jason Davis]

Rodney-roberts had a good start.

The serial0/0 is up is the administrative status. You'd poll that with

.1.3.6.1.2.1.2.2.1.7

ifAdminStatus OBJECT-TYPE

-- FROM RFC1213-MIB

SYNTAX Integer { up(1), down(2), testing(3) }

MAX-ACCESS read-write

STATUS Mandatory

DESCRIPTION "The desired state of the interface. The

testing(3) state indicates that no operational

packets can be passed."

::= { iso(1) org(3) dod(6) internet(1) mgmt(2) mib-2(1) interfaces(2) ifTable(2) ifEntry(1) 7 }

The ,line protocol is up is Operational Status, you'd get that from

.1.3.6.1.2.1.2.2.1.8

ifOperStatus OBJECT-TYPE

-- FROM RFC1213-MIB

SYNTAX Integer { up(1), down(2), testing(3) }

MAX-ACCESS read-only

STATUS Mandatory

DESCRIPTION "The current operational state of the interface.

The testing(3) state indicates that no operational

packets can be passed."

::= { iso(1) org(3) dod(6) internet(1) mgmt(2) mib-2(1) interfaces(2) ifTable(2) ifEntry(1) 8 }

You could monitor those values directly, but assuming you have Syslog and SNMP traps enabled you SHOULD get messages about the interface going down - unless that's the interface you're monitoring through. :)

A bit more advanced process would be to use RMON Alarm & Event to have the device 'self-monitor' and throw an SNMP trap when the values change passed a threshold you set.

http://www.cisco.com/en/US/tech/tk961/technologies_tech_note09186a0080094478.shtml

And even more brain-teasing method would be to use EVENT-MIB, but that's a real advanced option. :)