topic RE: CRC error monitoring via SNMP in ExtremeSwitching (EXOS/Switch Engine)

CRC error monitoring via SNMP

Saurabh_Makkar — Mon, 02 Jul 2018 11:17:00 GMT

We are trying to execute in SNMP to get realtime CRC errors via snmp walk
I found the oid with details with this link

https://extremeportal.force.com/ExtrArticleDetail?an=000087900

but when we are trying to execute snmpwalk, we are getting this result, hence not able to conclude how to get the details port wise

Below is the o/p in the tool
D:\Program Files (x86)\HP\HP BTO Software\bin>nnmsnmpwalk.ovpl 10.45.203.29 1.3.6.1.4.1.1916.1.11.1.1.3

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.1 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.2 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.3 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.4 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.5 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.6 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.7 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.8 : Counter: 0
.

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.296 : Counter: 1809
.
extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.778 : Counter: 0

extremeRtStatsTable.extremeRtStatsEntry.extremeRtStatsCRCAlignErrors.779 : Counter: 0

RE: CRC error monitoring via SNMP

BradP — Tue, 03 Jul 2018 02:14:00 GMT

Hi Saurabh,
Do you have rmon enabled on the switch? This will allow the switch to collect the information and make it available to the SNMP process. The command for doing so is "enable rmon" and doesn't need to be enabled on a per-port basis.

Thank you,Brad

RE: CRC error monitoring via SNMP

Saurabh_Makkar — Thu, 05 Jul 2018 15:32:00 GMT

rmon is already enabled the o/p is also correct

Just the decoding of o/p was a challenge here, now i decoded it 🙂
Thanks

Here is the decoding

the result shown in SNMP walk from nms tool is correct however the decoding of the o/p is little tricky here.

Each slot has a reserved number for representation of ports ,namely 256 , so the actual number represented would be ( slot # - 1)*256 + actual port # .

One odd and one even (One pair) matches to one physical port.

In below setup, 259 and 260 match to port 2:2, 261 and 262 match to port 2:3, 1537 and 1538 match to MSM128 management port(slot 7).

Below is the information

* BD-8806.1 # show slot

Slots Type Configured State Ports Flags

-------------------------------------------------------------------------------

Slot-1 G48Tc(PoE) G48Tc(PoE) Operational 48 M

Slot-2 10G4Xc 10G4Xc Operational 4 M

Slot-3 Empty 0

Slot-4 Empty 0

Slot-5 Empty 0

Slot-6 Empty 0

MSM-A 8900-MSM128 Operational 0

MSM-B Empty 0

BD8800 with slot1 G48TC and slot2 10G4XC

Name/OID: extremeRtStatsCRCAlignErrors.1; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.2; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.3; Value (Counter32): 0

“

“

“

Name/OID: extremeRtStatsCRCAlignErrors.94; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.95; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.96; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.257; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.258; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.259; Value (Counter32): 29412027

Name/OID: extremeRtStatsCRCAlignErrors.260; Value (Counter32): 1790583109

Name/OID: extremeRtStatsCRCAlignErrors.261; Value (Counter32): 419320560

Name/OID: extremeRtStatsCRCAlignErrors.262; Value (Counter32): 4100373752

Name/OID: extremeRtStatsCRCAlignErrors.263; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.264; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.1537; Value (Counter32): 0

Name/OID: extremeRtStatsCRCAlignErrors.1538; Value (Counter32): 0