Monitoring interface traffic with SNMP

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L2 Linker

Monitoring interface traffic with SNMP

Using physical PA boxes, this works fine.  However, with the VM version (at least in Azure) it does not.  Only the mgmt interface shows any traffic when reading interface statistics through SNMP.

 

Is this a known issue?  ethernet1/1 is the untrusted interface and I'd like to chart utilization of it, but it just stays 0.

 

IF-MIB::ifInOctets.1 = Counter32: 271149367
IF-MIB::ifInOctets.2 = Counter32: 0
IF-MIB::ifInOctets.3 = Counter32: 0
IF-MIB::ifInOctets.4 = Counter32: 0
IF-MIB::ifInOctets.5 = Counter32: 0
IF-MIB::ifInOctets.6 = Counter32: 0
IF-MIB::ifInOctets.7 = Counter32: 0
IF-MIB::ifInOctets.8 = Counter32: 0

 

IF-MIB::ifDescr.1 = STRING: mgmt
IF-MIB::ifDescr.2 = STRING: ethernet1/1
IF-MIB::ifDescr.3 = STRING: ethernet1/2
IF-MIB::ifDescr.4 = STRING: ethernet1/3
IF-MIB::ifDescr.5 = STRING: ethernet1/4
IF-MIB::ifDescr.6 = STRING: ethernet1/5
IF-MIB::ifDescr.7 = STRING: ethernet1/6
IF-MIB::ifDescr.8 = STRING: ethernet1/7

L1 Bithead

Re: Monitoring interface traffic with SNMP

I haven't been able to get it work.  PA support told us it was due to Azure limitations and the drivers they are using for their NIC's.  The workaround we were provided was using the Palo Alto chrome app....

L2 Linker

Re: Monitoring interface traffic with SNMP

That's unfortunate.  I was hoping to add that interface to my "outside world connectivity" dashboard, but I guess that won't be happening.

L0 Member

Re: Monitoring interface traffic with SNMP

I just wanted to chime in here that we are currently experiencing this exact same issue in Azure using VM-300's. We have 3 interfaces, including the management interface, and we are only able to see traffic data for the management interface. We've tried using both the 32bit Counters (1.3.6.1.2.1.2.2.1) and the 64bit Counters (1.3.6.1.2.1.31.1.1) and both are 0.

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000CmrcCAC

 

This KB describes the exact same issue; however, the 0 values persist even when using the 64bit Counters. Is anyone able to confirm that this is in fact an Azure problem? It's very odd that some traffic and not all would be showing, especially since the management NIC is also hosted in Azure.

 

SNMPInterfaces64.pngSNMPWalk64.pngSNMPWalkLinux.png

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