I have been reading through the 5K config guides and going over some Cisco Live 365 documentation in order to better understand queuing on the 5K platform, and I have a few things that require clarification. I have included a couple drawings that will better illustrate my questions (in red), but at a high level here is what I need help understanding:
1) Where do the input and output queuing policies take effect? The config guide suggests that an input queuing policy is only used to tell a CNA about its policy through DCBX. But some of the CiscoLive365 presentations seem to suggest otherwise (see drawing, which is a snippet from the 5K Architecture Breakout, BRKARC-3452). Also, where specifically do the output queuing policies take effect? Because everything is ingress buffered and subsequently scheduled off of the VoQs, it would make sense if the egress interface's queuing policy tells the scheduler how to behave. Is that right? Because my understanding is that the actual egress queues only get used in very rare instances when a PAUSE is received while a packet is in transit on the fabric.
2) Why are the QoS groups required? I suspect that they are needed because of the lack of hardware queues, so they effectively map a class of traffic into a VoQ. Is that correct?
Introduction This article will help you understand the steps on how to
download the UCS licenses from the Cisco Systems website and then
installing it on the UCS. The redacted (blue lines) just covers up
certain numbers for privacy please do not take them...
Introduction This article will help you understand and educate the
customer on how to clear their "expired licenses"
(license-graceperiod-expired) from their UCS-M. If a customer just
purchased a license and needs a step by step guide on how to download
==================== VIC FNIC driver does not support Virtual Volumes (
second level LUN ID ) An enhancement request has been created to track
this feature - CSCux64473 UPDATE - 12-14-2016 We made some traction on
the enhancement request - The Fix is in t...