All interfaces mentioned above, and also other interfaces but the config is the same, are showing a lot of OutDiscards / Output Drops. The 2960G switches have several servers connected (gigabit) and the 3560 is a coreswitch connecting al the 2960G's together.
Anyone knows why there are output dops? Switches should be fast enough.
It may be possible that your uplinks from 2960G switches to the 3560G switches are overutilized. If a traffic from multiple servers on your 2960G aggregates, the total amount of frames sent through a particular physical link in your Etherchannel may be significantly more than the interface and its controller can handle - therefore, output drops may arise.
Personally, I would suggest monitoring the load on the individual physical links to see whether there are indeed periods of high traffic. Also, try to modify the Etherchannel load balancing algorithm on individual switches according to the traffic properties to achieve maximum dispersion over the physical links.
One more question: why do you have the spanning-tree link-type point-to-point command on your Port-channel interfaces? The STP should treat them as P2P links by default.
1. Log into CLI of DNAC:
ssh maglev@< DNAC appliance IP> -p 2222
2. Run this curl command to get token to get member id:
curl -X POST -u admin:<admin user password> -H -V https://<CLUSTER-IP>/api/system/v1/identitymgmt/token
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Purpose of the document
This document describes the general recommendations or best practices when designing and deploying the Cisco SD-Access technology. The document assumes that the reader has a general overview of Cisco's SD-Access for Distributed C...
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