After applying Cisco recommended QoS configuration to a WAN site router users experienced performance issues. The problem was resolved by changing the default queuing to WFQ - from WRED/FIFO. The Cisco documentation recommended FIFO/WRED for default traffic on a medium size WAN link >768Kb<2048Kb. REF:"Enterprise QoS Solution Reference Network Design Guide v3.3" PG 3-10.
In general, getting the intended benefit out of WRED is very, very difficult, especially Cisco's implementation. I recommend you avoid using it, although it's handy for getting marked packets stats passing through a class.
FQ, also in general, is usually much, much better than FIFO. It's often safe to use it when you don't otherwise truly understand how to manipulate traffic with QoS. (There are excecptions, though.)
The problem you may have bumped into, I believe, Cisco's CBWFQ class-default FQ can keep other defined classes from obtaining their bandwidth guarantees on most Cisco CBWFQ supporting platforms.
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...