Quick real-time bandwidth monitoring by SNMP Tool – STG

1. Target Address

– Put IP address of device that you want to pull information from. It could WAN or LAN interface, and it shouldn’t be blocked SNMP 161 to communicate with Server which this SNMP tool installed.
In this example, I used WAN IP address of a device.

2. Community

– Put Community sting as "ipBalance". You can put whatever strings you want, but common SNMP string "public" is not recommended for especially long term period of monitoring without secure plan for SNMP traffic.

** in this case, community name is "ipBalance" which must be matched with stg’s setting

3. Green OID & Blue OID

– This is Object Identification for MIB value. Good to know details of SNMP and MIB OID, but it require a lot of reading and understanding. In this case, I will give you simple idea and tips to quick as possible.

Look at initial value from settings

1.3.6.1.2.1.2.2.1.10.1 – Green OID
1.3.6.1.2.1.2.2.1.16.1 – Blue OID

Green & Blue label is just for the look to easily separate inbound and outbound traffic on the graph

I won’t explain what is 1.3.6~~~ bla~ bla~. b/c this article become a book.

okay, here is what you need to know.

10 = inbound traffic (MIB OID = ifInOctets)
16 = outbound traffic (MIB OID = ifOutOctets)

Last digit #(in this case 1) is interface index #. See below output from Cisco router(7200).

Commend: show snmp mib ifmib ifindex
or show snmp mib ifmib ifindex serial3/0 – just for the target interface

To find OIDs, check below article (click)

"How to find OIDs from device for snmp monitoring"

[ Cisco Systems Devices ]

ex) if you want to monitor Ethernet 4/0, OID value would be

1.3.6.1.2.1.2.2.1.10.12 – Green OID – Inbound
1.3.6.1.2.1.2.2.1.16.12 – Blue OID – Outbound

Free memory      1.3.6.1.4.1.9.9.48.1.1.1.6.1 (Gauge value)
Cpu  load             1.3.6.1.4.1.9.2.1.56.0           (Gauge value)

[ Tasman / Nortel Devices ]

ex) if you want to monitor Tasman/Nortel 1004 router, OID value would be

1 = Ethernet
8 = Serial 1
9 = Serial 2
10 = MFR boundle interface
1.3.6.1.2.1.2.2.1.10.10 – Green OID – Inbound of MFR bundle
1.3.6.1.2.1.2.2.1.16.10 – Blue OID – Outbound of MFR bundle

– If you are collecting information thru LAN connection(consider as higher bandwidth than WAN), you can use short interval (1~3 second which is 1000~3000 ms).
However, if you are collecting information thru WAN connection, 3~6 second which is 3000~6000 ms would be better for accuracy.

[ Livingston ]

Ethernet port traffic
          outgoing   1.3.6.1.2.1.2.2.1.16.1
          incoming   1.3.6.1.2.1.2.2.1.10.1

Serial (Wan) port traffic
          outgoing   1.3.6.1.2.1.2.2.1.16.97
          incoming   1.3.6.1.2.1.2.2.1.10.97

4. Show traffic in

– In telecommunication world, we prefer to use bits unit.

5. Update Period