High number of reported discards on a monitored interface within Orion Web Console

10/9/2018 6:36 PM

11/2/2022 11:34 AM

This article provides information on a high number of reported discards, errors and interface statistics on a monitored device within Orion, and discusses the OIDs to check for these statistics. An interface discard is where the device has decided to discard a packet for some reason. It could be a corrupt packet, the device is busy, buffer overflows, packet size issues, and several other things. Network Performance Monitor pulls the discard information reported within a device from the RFC1213:IfTable.

Orion Platform

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, policy rules, and several other things. Network Performance Monitor pulls the discard information reported within a device from the RFC1213:IfTable, more specifically the OIDs for IfInDiscards and IfOutDiscards:

ifInDiscards = 1.3.6.1.2.1.2.2.1.13

ifOutDiscards = 1.3.6.1.2.1.2.2.1.19

 

The full table of OIDs for these interface statistics and errors are:

ifInNUcastPkts (.1.3.6.1.2.1.2.2.1.12)	These are counts of inbound broadcast and multicast packets.
ifInDiscards (.1.3.6.1.2.1.2.2.1.13)	These are counted as no buffers as reflected in the show interfaces command.
ifInErrors (.1.3.6.1.2.1.2.2.1.14)	These are counts of all input errors as reflected in the show interfaces command.
ifInUnknownProtos (.1.3.6.1.2.1.2.2.1.15)	These are counted as unclassified errors.
ifOutOctets (.1.3.6.1.2.1.2.2.1.16)	These are counts of the number of bytes output by the interface as shown in the show interfaces command.
ifOutUcastPkts (.1.3.6.1.2.1.2.2.1.17)	These are counts of outbound broadcast and multicast packets.
ifOutDiscards (.1.3.6.1.2.1.2.2.1.19)	These are counted as output drops as shown in the show interfaces command.
ifOutErrors (.1.3.6.1.2.1.2.2.1.20)	These are counted as output errors as shown in the show interfaces command.
ifOutQLen (.1.3.6.1.2.1.2.2.1.21)	This is the number of packets allowed to be on the output queue as shown in the show interfaces command.

 

Note: The Received Discards in Orion is an incremental number.
           
Orion has no capability within the web console to zero out the number, though this is possible from within database manager - see this article for more information: How to clear discards and errors statistics for the day