turn on suggestions
![]() Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
|
07-25-2011 08:09 AM
Hi,
We're actually monitoring utilization of Brocade Fiberchannel (Brocade 4100) interface trought the SW-MIB file.
We use this OID (1.3.6.1.4.1.1588.2.1.1.1.6.2.1.11 & 1.3.6.1.4.1.1588.2.1.1.1.6.2.1.12) who report the 'word' passing throught the interface (.11 is TX and .12 is RX)
Refer to the OID description in the MIB file, this 'word' unit seems to be equal to 4 bytes (so 32 bit).
So is the formula : ('word value' * 32) / (1024*1024) we should get the instant throughput in Mbit/s ???
But actually we offen report value out of the bandwith of the link.
Example:
the interface bandwith is 2 Gbit/s FD
@ Tuesday, June 28, 2011 11:00:00 AM, the word value is = 190800930
apply formula : (190800930 * 32) / (1024*1024) = 5822,78228759765 (so 5,822 Gbit/s ???)
Anyone got an idea or got this issue before ?
This is for an audit report and so it's a bit hurrry bor us.
Thanks all !
07-25-2011 08:21 AM
Hi -
@ Tuesday, June 28, 2011 11:00:00 AM, the word value is = 190800930
190800930 is the number of words transmitted/received since last reset of counter, it's not a speed value !
To have speed you have to poll values at least twice and make difference : counter(T2) - counter(T1)/(T2 -T1) will give average speed between T1 and T2 timestamps.
I suggest you to use 64 bits SNMP counters available in FA-MIB (you won't have words but octets, easier to use)
connUnitPortStatCountTxElements 1.3.6.1.3.94.4.5.1.6
The number of octets or bytes that have been transmitted by this port. There is an one-second
periodic polling of the port. This value is saved and compared with the next polled value to compute
net throughput.
For Fibre Channel, ordered sets are not included in the count.
connUnitPortStatCountRxElements 1.3.6.1.3.94.4.5.1.7
The number of octets or bytes that have been received by this port. There is an one-second periodic
polling of the port. This value is saved and compared with the next polled value to compute net
throughput.
For Fibre Channel, ordered sets are not included in the count.
Hope this helps
Kind regards,
--
david