We do use SNMP tools for network monitoring and historical usage. Are graphs show a discard in packets always after hours around 18:00 - 22:00...
When I perform a "show log" on the rounter nothing shows up no errors.
When I perform a "show interface summary", it shows the IQD is at 7.. meaning that it received 7 packets it couldn't process so discarded them. We increased the hold-queue at around 4pm to 4096 and the problem still occured.
My first idea would be to look for anything in your company or building that happens at those times, and only those times. I've seen interference from large machinery (like in my case real-size diesel engines with a ship machine room simulator, 4 floors below) causing freak framing errors on network cabling in certain situations. A sudden peak in power beeing drawn from electric lines parallell to network cabling might cause similar results, and would possibly show up as peaks in cpu usage and memory aswell due to the overhead created by retransmissions and/or attempts to read mangled frames.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...