How to monitor VLAN loading via SNMP on CISCO equipment?

Question

Monitoring

• Client equipment (PC1 ... PC5) is physically connected to Cisco 3560-1 and Cisco 3560-2 switches, combined into one VLAN10.
  
• PC10-PC12 are connected to Cisco 3560-3, united in VLAN20.
  
• Switches are connected via trunk .
  

It is required to obtain information on the channel load on the central Cisco 3750-2 separately for VLAN10 and VLAN20.
How can I get the SMNP channel load on the Cisco 3750-2 switch separately for VLAN10 and VLAN20 in Zabbix?
(unless, of course, this is possible)
As far as I understand, this can be obtained through the OID IfInOctets / IfOutOctets and in the template specify to store values ​​- Delta. But I could not get the correct OIDs for VLANs in the Cisco 3750-2 .

Answer 1

For 3750 and 3560 no way. There are vlan counters in 6500 and, maybe, in some variants 4500.

Answer 2

> But I couldn't get the required OIDs for VLANs in the Cisco 3750-2
How did you search? There is a wonderful program called snmpwalk. With it, you can pull out all the OIDs. I advise you to save the output to a file, because the process is long and then it will be easier to grab the necessary OIDs by the interface ID. We find the ID of the required interface, for example:
IF-MIB::ifDescr.138 = STRING: FastEthernet0/0.25
And then we grapple by ID and find the lines we need:
IF-MIB::ifInOctets.138 = Counter32: 3066094
IF-MIB::ifOutOctets .138 = Counter32: 1929934
Or you don't have to worry, just substitute the value of the interface ID.

Answer 3

But I couldn't get the right OIDs for VLANs in the Cisco 3750-2

Try using the snmpwalk utility with OID 1.3.6.1.2.1.2.2.1.2. If I remember correctly, you should get a list of interface names, look for your VLANs there.
Generally speaking, the solution to your problem depends very much on the hardware specifics. There is a suspicion that in the corresponding counters 3750 only traffic on the L3 interface related to the VLAN is taken into account, and traffic switched using ASICs is not taken into account.

Answer 4

well, if there is a mib that shows the loading of the vlan, then track it, and if not, then no way