New Training: Verify LLQ Configuration
In this 5-video skill, CBT Nuggets trainer Jeff Kish dives into the lab to configure and verify LLQ configuration, which includes CBWFQ, priority-levels, bandwidth reservations, shaping/policing, and WRED! Watch this new Cisco training.
Learn Cisco with one of these courses:
Cisco CCNP Collaboration Core
This training includes:
49 minutes of training
You’ll learn these topics in this skill:
Shaping, Policing, and WRED Configuration
Review and Quiz
What is LLQ?
Networking in an enterprise environment is much more complicated than SOHO networks. There are a lot of moving pieces. Enterprises handle all sorts of data, too, and some of that data is more important than other bits. For instance, VoIP telephone calls need real-time data transmission to work properly. Any delay in data transmission can make calls stutter or disconnect entirely. Though a business can spend more money and upgrade network equipment, it's a much wiser idea to implement QoS (quality of service) policies to ensure important data always takes priority first. One component of QoS in Cisco systems is LLQ or low latency queuing.
LLQ is part of the class-based queuing system. It sits at the top of the CBQF scheme as a priority queue. Any information that is sent to this queue is transmitted through the network before all other data. LLQ allows other data to be moved to less important queues by dropping their priority so important data can be sent first. LLQ should be used with caution, though. Abusing it can easily saturate a network.
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