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Sunday, April 27, 2014

PRTG monitors PPS on Cisco routers using SNMP



In this post i will explain how to monitors PPS (Packet Per-Second) on Cisco routers using SNMP on PRTG Network Monitor.

First login into the router and get the interface index table:

RTR#show snmp mib ifmib ifindex
FastEthernet1/1: Ifindex = 2
GigabitEthernet0/3: Ifindex = 6
GigabitEthernet0/1: Ifindex = 3
VoIP-Null0: Ifindex = 7
Loopback0: Ifindex = 10
Null0: Ifindex = 9
FastEthernet1/0: Ifindex = 1
GigabitEthernet0/2: Ifindex = 5
Tunnel1: Ifindex = 11
NVI0: Ifindex = 12
FastEthernet0/2: Ifindex = 4
SSLVPN-VIF0: Ifindex = 8
RTR#

Then open the PRTG console and add new sensor to the device, search SNMP Custom and choose SNMP Custom (not SNMP Custom String!)


Type a name for the sensor – something like interface name with packet direction (for example: Gi0/1 PPS in)

Enter the correct OID:



Use:
1.3.6.1.4.1.9.2.2.1.1.9 for output packets
1.3.6.1.4.1.9.2.2.1.1.7 for input packets

Don’t forget to add the interface index number after the OID, for example if I would like to monitor GigabitEthernet0/3 input packet per-second the correct OID will be: 1.3.6.1.4.1.9.2.2.1.1.7.6

also add "/s" on the unit string to show that this unit is per-second.

click Continue and that's it.
 




1 comment:

  1. Truly, the best blog I have ever perused. Went gaga for this at the principal locate.
    Mike Wallace

    ReplyDelete