Q. Using the 'SNMP Traffic' probe, InterMapper does not see any interface information.
Running snmpwalk against it shows that interface data is present, just slightly different than I have seen.
For example, for a particular interface, in this case Ether1/2 the following data is presented:
Code: |
IF-MIB::ifName.436211712 = STRING: Ethernet1/2 IF-MIB::ifType.436211712 = INTEGER: ethernetCsmacd(6) IF-MIB::ifMtu.436211712 = INTEGER: 1500 IF-MIB::ifSpeed.436211712 = Gauge32: 4294967295 IF-MIB::ifInOctets.436211712 = Counter32: 2118158300 IF-MIB::ifInUcastPkts.436211712 = Counter32: 2578448498 IF-MIB::ifInNUcastPkts.436211712 = Counter32: 2132553 IF-MIB::ifOutOctets.436211712 = Counter32: 165806974 IF-MIB::ifOutUcastPkts.436211712 = Counter32: 75510023 IF-MIB::ifOutNUcastPkts.436211712 = Counter32: 6454548 |
A. The Nexus returns 64-bit interface data for virtual interfaces (eg, port channels), but not for the physical interfaces. 32-bit interface data is returned fine, but is not of much use for 10Gigabit line speeds.
Also, another issue is that the Nexus does not return SNMP interface data in real time. Rather when you query the switch you get returned data that is 15 to 20 seconds old.
Cisco says that that 64-bit counters for the physical interfaces are supported on the Nexus 5000s, as of NX-OS 4.1.3 N2.1.