I am seeing a high number of discards reported on one of my monitored WAn rtr (3845). Solarwinds Orion NPM is reporting a steady flow of error on two links, but not all links. What is the typical cause of these reported discards? I see no error or counter increases in the >sh int xx; where xx is the interface shown in the solarwinds reports
Google tells me that
"An interface discard is simply where the device has decided to discard a packet for some reason. The reason a device discards the packet(s) is typically hard to tell. It could be a corrupt packet, that the device is busy, buffer overflows, packet size issues, and several other things."
The Orion Network Performance Monitor pulls the discard information reported within Orion in the RFC1213:IfTable, more specifically IfInDiscards and IfOutDiscards.
These are the OIDs for IfInDiscards and IfOutDiscards we use to gather this
Interface Errors and Discards:
OID = ifInDiscards 18.104.22.168.22.214.171.124.1.13.
OID = ifInErrors 126.96.36.199.188.8.131.52.1.14.
OID = ifOutDiscards 184.108.40.206.220.127.116.11.1.19.
increasing on two interfaces but not on any others
OID = ifOutErrors 18.104.22.168.22.214.171.124.1.20
there are no error and only the outgoing direction has discards
How do i debug this more or get more info on how to track down the root cause?
I too have this in Orion NPM, even on the LAN, 3750X. I was told by Cisco that it is a 'cosmetic bug'
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