I apologize for the confused answer. Let me clarify:
For half-duplex,usually on LANs, you can use this expression:
BandwidthUtilHdx \
"8*100*(ifInOctets+ifOutOctets) / ifSpeed" \
.1.3.6.1.2.1.2.2.1.10. \
.1.3.6.1.2.1.2.2.1.16. +\
.1.3.6.1.2.1.2.2.1.5. / \
800 *
For full duplex, usually on WANs, you should measure inbound and outbound
traffic separately, since the link can use 100% of the ifSpeed in both
directions
at the same time:
BandwidthUtilIn \
"8*100* ifInOctets / ifSpeed" \
.1.3.6.1.2.1.2.2.1.10. \
.1.3.6.1.2.1.2.2.1.5. / \
800 *
BandwidthUtilOut \
"8*100* ifOutOctets / ifSpeed" \
.1.3.6.1.2.1.2.2.1.16. \
.1.3.6.1.2.1.2.2.1.5. / \
800 *
Cordially,
Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit
Fission CC
Lin@IBMTW To: Leslie
Clark/Southfield/IBM@IBMUS
cc:
05/13/2002 12:10 From: Fission CC
Lin/Taiwan/IBM@IBMTW
AM Subject: Re: [nv-l] Bandwidth
Usage
Dear sir,
What I would like to ask is why you will expect me to use "full-duplex"
for a link between routers and the formula you provide ( sum of send and
receive divided by the interface speed ) should be used for half-duplex but
not full-duplex. I checked the mibExpr.conf and found that Netview only
provide the half-duplex formula, could you show me the full-duplex one? I
need your help. Thank you very much!!!
That's what the Data Collection function is for. Among the pre-defined mib
expressions you will find both half-duplex and full-duplex bandwidth
utilization. You need to determine which interface is involved in the link,
by index number in the MIB II interface table, and start up data collection
on one end, or both ends. For a link between routers I exect you will
use full-duplex (sum of send and receive divided by the interface speed.)
See the manual, and the online help. The function is under
Tools..MIB..Collect Data.
Cordially,
Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit
Best Regards,
Fission Lin, 林倩全
I / T Specialist , Tivoli Professional Services,
ITS/SMBU/NSM, IBM Taiwan
206, Sec.1 Keelung Rd, Taipei, Taiwan, R.O.C.
Tel:886-2-2725-8872, Mobile:0935-558622
E-Mail: flin@tw.ibm.com
Best Regards,
Fission Lin, 林倩全
I / T Specialist , Tivoli Professional Services,
ITS/SMBU/NSM, IBM Taiwan
206, Sec.1 Keelung Rd, Taipei, Taiwan, R.O.C.
Tel:886-2-2725-8872, Mobile:0935-558622
E-Mail: flin@tw.ibm.com
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