topic RE: how can congestion be monitored via SNMP? in ExtremeSwitching (EXOS/Switch Engine)

how can congestion be monitored via SNMP?

EtherNation_Use — Wed, 08 Jan 2014 08:55:00 GMT

Create Date: Aug 21 2013 7:59PM

I'd like to monitor for network congestion. In particular, the counters displayed by "show ports congestion" would be great. I see that EXTREME-PORT-MIB has extremePortCongDropPkts, which I'd think would be exactly the right thing. However, it's just not present:$ /usr/bin/snmpwalk switch01 -m ALL EXTREME-PORT-MIB::extremePortCongDropPkts -v 3 -u initialEXTREME-PORT-MIB::extremePortCongDropPkts = No Such Instance currently exists at this OIDRunning EXOS 12.6.2.10 on a stack of two X460-48p.Anyone have ideas on how I might otherwise monitor for congestion? (from Phil_Frost)

RE: how can congestion be monitored via SNMP?

EtherNation_Use — Wed, 08 Jan 2014 08:55:00 GMT

Create Date: Aug 22 2013 11:27AM

I have found the extremePortCongDropPkts in the Extreme MIB with OID ".1.3.6.1.4.1.1916.1.4.14.1.1". I tested snmpwalk with OID and it works.
Have you also test a SNMP request with OID?

Regards
Elwood (from Peter_Eschholz)

RE: how can congestion be monitored via SNMP?

EtherNation_Use — Wed, 08 Jan 2014 08:55:00 GMT

Create Date: Aug 22 2013 3:31PM

elwood wrote:I have found the extremePortCongDropPkts in the Extreme MIB with OID ".1.3.6.1.4.1.1916.1.4.14.1.1". I tested snmpwalk with OID and it works.Have you also test a SNMP request with OID?

Yes, I did. I saw that in the MIB also, but my device just doesn't have it. What OS/device are you running? I could probably upgrade to EXOS 15, if I knew it would fix something. Up to now nothing's been broken, so I haven't fixed anything. (from Phil_Frost)

RE: how can congestion be monitored via SNMP?

EtherNation_Use — Wed, 08 Jan 2014 08:55:00 GMT

Create Date: Aug 22 2013 5:03PM

I use the ireasoning mibbrowser for check some different Extreme MIB files and find also extremePortCongDropPkts in version 11.6.3 and 12.3.3.

I tested snmpwalk with OID number (not a string!) on different X460 switches with XOS 12.6.1.3 and XOS 15.3.2 and both works fine. The result:

SNMPv2-SMI::enterprises.1916.1.4.14.1.1.1001 0
SNMPv2-SMI::enterprises.1916.1.4.14.1.1.1002 0
...
SNMPv2-SMI::enterprises.1916.1.4.14.1.1.1024 0

Regards
Elwood
(from Peter_Eschholz)

RE: how can congestion be monitored via SNMP?

EtherNation_Use — Wed, 08 Jan 2014 08:55:00 GMT

Create Date: Aug 23 2013 10:18AM

For use MIB tags in a SNMP request it is important to load your special MIB files in the tool environment.
I found helpful information for this scenario here:

http://www.net-snmp.org/tutorial/tutorial-5/commands/mib-options.html

Now I can run on my linux system "/usr/bin/snmpwalk EXTREME-PORT-MIB::extremePortCongDropPkts" and the output is

EXTREME-PORT-MIB::extremePortCongDropPkts.1001 0
EXTREME-PORT-MIB::extremePortCongDropPkts.1002 0
...
EXTREME-PORT-MIB::extremePortCongDropPkts.1024 0

I hope it is helpful!

Best Regards
Elwood

(from Peter_Eschholz)