| Title: | DECmcc user notes file. Does not replace IPMT. |
| Notice: | Use IPMT for problems. Newsletter location in note 6187 |
| Moderator: | TAEC::BEROUD |
| Created: | Mon Aug 21 1989 |
| Last Modified: | Wed Jun 04 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 6497 |
| Total number of notes: | 27359 |
Also in FDDI notesfile:
<<< UPSAR::USER$411:[NOTES$LIBRARY]FDDI.NOTE;1 >>>
-< FDDI - the Next Generation >-
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Note 1548.0 DECconcentrator 500 Inbound Error Packet Rate No replies
CUJO::BROWN "Dave Brown" 45 lines 6-JAN-1995 12:52
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We are seeing an incredibly high inbound error packet rate on our
customer's 14 or so DC500s. Is this an accurate statistic? The reason I
ask is that the line and port counters in the DC500 are not at all as
alarming as the supposed inbound error packet rate.
With DECmcc, we issue the following command and get the following
results:
MCC>SHOW SNMP .IP.<dc500> ALL STATISTICS, FOR DURATION 0:01:0
Duration = 60 Secs
Rcvd Octets = 20320
Inbound Packets = 188 Packets
Rcvd Octet Rate = 338.67 Octets/Sec
Inbound Packet Rate = 3.13 Packets/Sec
Xmitd Octets = 4471 Octets
Outbound Packets = 34 Packets
Xmitd Octet Rate = 74.52 Octets/Sec
Outbound Packet Rate = 0.57 Packets/Sec
Total Octets = 24791 Octets
Total Packets = 222 Packets
Total Packet Rate = 3.7 Packets/Sec
Inbound Error Packets = 138 Packets <- Exact Meaning?
Inbound Error Packet Percent = 73.4 Percent What kind of
Outbound Error Packets = 0 Packets errors? Why don't
Outbound Error Packet Percent = 0 Percent we see a high
Total Error Packets = 138 Packets LEM or other
Total Error Packet Percent = 62.16 Percent error type if
Total Octet Rate = 413.18 Octets/Sec 73% of the
Inbound Error Packet Rate = 2.3 Packets/Sec packets are bad?
Outbound Error Packet Rate = 0 Packets/Sec
Total Error Packet Rate = 2.3 Packets/Sec
Bottom line - Are these reliable statistics? Should we be
concerned? The customer did notice that when the Inbound Error Packet
Percent approached 100%, there was a port failure on the DC500 turning
on the red light. BUT still the FDDI line counters remain relatively
low to zero on the ports.
Any info would be appreciated.
Dave
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 6211.1 | Unknown Protocols? | CUJO::BROWN | Dave Brown | Sat Jan 07 1995 02:48 | 9 |
The customer has done some more research and now beleives that the
Inbound Error Packet rate has to do with unknown protocols (anything
not IP) and therefore is bogus.
Is this correct?
Thanks,
Dave
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| 6211.2 | what does it use? | NPSS::TAYLOR | Wed Jan 11 1995 18:20 | 12 | |
I suppose the question could be, how does mcc calculate the Inbound
Error Rate?
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| 6211.3 | The PA was fixed way back in 1993. | NPSS::WADE | Network Systems Support | Thu Jan 12 1995 22:02 | 47 |
The PA FM Use on page F-6 gives the formula which counts
ifinunknownprotos as errors. This is a bug and I remember
bringing this to the attention of Larry Grossman and getting a new
MCC_PA_FM.EXE;4 that had the following fixes -
From: TOOK::L_GROSSMAN "DTN: 226-5318" 23-AUG-1993 16:03:54.27
To: OCONNOR
CC: SCHOOL::RLEBLANC,NPSS::WADE
Subj: A new DECmcc PA image is now available:
I built a new PA that should take care of the following problems:
1) The original fix for durations that exceed 16:00:00 hours
(~ 0.9*65535 seconds).
2) Iconic Map interface not allowing the user to see more past data.
This includes the problem of not being able to graph past historical
data.
3) The UnknownProtocal counter has been removed from error statistics.
This includes:
SNMP Global entity:
Inbound error packets
Inbound error packet rate
Inbound error packet percent
Total error packets
Total error packet rate
Total error packets percent
SNMP Interface Child entity:
Inbound error packets
Inbound error packet rate
Inbound error packet percent
Total error packets
Total error packet rate
Total error packets percent
SNMP IP Child entity:
Inbound error Dgrams
Inbound error Dgrams percent
Total error Dgrams
I can't locate the image and I haven't heard back from Larry yet.
Bill
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| 6211.4 | NPSS::WADE | Network Systems Support | Thu Jan 12 1995 22:10 | 16 | |
Latest -
From: TOOK::L_GROSSMAN "DTN: 227-3286"
To: NPSS::WADE
CC:
Subj: RE: Looking for this MCC PA image
Please try:
TOOK::NSM_CLD:[DECMCC.CSC_PA_2]MCC_PA_FM.EXE
Larry
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| 6211.5 | Problem solved | CUJO::BROWN | Dave Brown | Wed Jan 18 1995 02:42 | 11 |
We were given a pointer to a new MCC_PA_FM.EXE image by GIGAswitch
engineering. The image ident is "DECMCC V1.3-02" and the link date and
time is "24-MAR-1994 12:55:42.72"
It works great!
Thanks,
Dave
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| 6211.6 | IfUnknownProtos Valid??? | KILROY::NSDP | Fri Feb 24 1995 01:10 | 10 | |
Is IfUnknownProtos a valid counter in and of itself? I have a customer that is
using Xyplex 6220 Routers and these are cropping up on a few units. Sometimes
the counter can increment at 40 per minute. DECmcc help defines this as the
number of packets discarded do to an unknown or unsupported protocol. The
Xyplex unit itself has counters as viewed when connected to the router called
IP Unknown Protocols. This counter does not increment, yet SNMP IfUnknownProtos
increments quite alot.
Kevin Simmons
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