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New Member

Need OID for rxload and input rate

Hi all,

I want to monitor the rxload and input rate on interfaces but I can't find the correct OID can someone help me with this please.

Can someone also provideme a good document for this

GigabitEthernet4/8 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet Port, address is 000d.657d.3387 (bia 000d.657d.3387)

  Description: --- 2924_MAIN ---

  MTU 1500 bytes, BW 100000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Half-duplex, 100Mb/s, link type is auto, media type is 10/100/1000-TX

  input flow-control is off, output flow-control is off

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:47, output never, output hang never

  Last clearing of "show interface" counters 20w1d

  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 5000 bits/sec, 4 packets/sec

  5 minute output rate 153000 bits/sec, 26 packets/sec

     143271178 packets input, 34567505950 bytes, 0 no buffer

     Received 2731549 broadcasts (295416 multicast)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 input packets with dribble condition detected

     253476590 packets output, 117220536494 bytes, 0 underruns

     1341644 output errors, 542074 collisions, 0 interface resets

     0 babbles, 259071 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

Everyone's tags (1)
6 REPLIES
New Member

Re: Need OID for rxload and input rate

Hi Experts

Can i get some help on this please

Thanks

New Member

Re: Need OID for rxload and input rate

Hi,

     There is no specific OID for the values you are after, but they can be calculated based on polling some OID's.

    To calculate the interface input traffic rate & rxload you would need to poll ifHCInOctets & ifHighSpeed at a regular interval and then perform the following calculation :

input bps = 8  * detaif ifHCInOctets / polling interval in seconds 

* where detaif ifHCInOctets is the difference between the current and previous value of  ifHCInOctets

rxload = 255 * input bps / (1000000 * ifHighSpeed )

* rxload is simply the input trafic rate expressed as a multiple of interface speed/255

NB ifHCInOctets is a 64 bit counter so you will need to poll it using snmp v2

     Hope this helps.

Regards

Derek Clothier

New Member

Re: Need OID for rxload and input rate

Correction.  Typing mistake.

detaif ifHCInOctets should be

deltaifHCInOctets ie change in ifHCInOctets

New Member

Re: Need OID for rxload and input rate

Hi Derek,

Can you send me any cisco document link for this, it will help dig out some information from it.

I will really appreciate your help

Thanks

New Member

Re: Need OID for rxload and input rate

Hi,

     I haven't been able to find any documentation on CCo regarding this, but in my searching, I have come across the following MIb Object, which will tell you the input rate on the interface :

.1.3.6.1.4.1.9.2.2.1.1.6

locIfInBitsSec OBJECT-TYPE

    -- FROM     OLD-CISCO-INTERFACES-MIB

    SYNTAX          Integer

    MAX-ACCESS     read-only

    STATUS          Mandatory

    DESCRIPTION    "Five minute exponentially-decayed moving                            average of input bits per second."

     There is a similar object  locIfOutBitsSec (.1.3.6.1.4.1.9.2.2.1.1.8) for the output rate.

     To so rxload = 255 * locIfInBitsSec / (1000000 * ifHighSpeed )

Regards

Derek

New Member

Re: Need OID for rxload and input rate

I found the below info when researching on Internet.

 

"SNMP Counters: Frequently Asked Questions" article explains the comparison between ifInOctets/ifOutOctets (32-bit counter) and ifHCInOctets/ifHCOutOctets (64-bit counter).

 

In summary, for interface with physical speed

<= 20 Mbps                 you must use 32-bit octet (byte) and packet counters

20 Mbps - 650 Mbps   you must use 64-bit octet counters and 32-bit packet counters

>= 650 Mbps               you must use 64-bit octet and packet counters HTH

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