# QoS LLQ (Low Latency Queueing) on Cisco IOS **URL:** \ **Category:** Lessons Discussion\ **Created:** [June 14, 2017, 12:17pm UTC](https://forum.networklessons.com/t/qos-llq-low-latency-queueing-on-cisco-ios/1817 "2017-06-14T12:17:31Z")\ **Posts on this page:** 1\ **Showing post:** 52
**Author:** ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)\ **Post date:** [May 19, 2021, 8:22am UTC](https://forum.networklessons.com/t/qos-llq-low-latency-queueing-on-cisco-ios/1817/52 "2021-05-19T08:22:40Z")
Hello Brahim When implementing class maps, there are many things that you can match to and many different ways of implementation. In your particular class maps that you shared, you have matches using - access lists - DSCP values And you have policy maps calling those class maps that will match them and assign either bandwidth percentages to them, or set various DSCP values. in order to understand policy-maps and class-maps better, take a look at the following post which includes additional links: > [@Class-map,route-map,policy-map & Access list](https://forum.networklessons.com/t/class-map-route-map-policy-map-access-list/4918/2): > > Hello Kunal If you have any suggestions, please use the lesson ideas page where you can suggest specific lessons. [https://networklessons.com/member-ideas/](https://networklessons.com/member-ideas/) In the meantime, I can tell summarise these concepts. An access list is an entity that can be configured in a layer three device that will do two things: filter and classify. An ACL will filter traffic when applied to an interface in an in or out direction. Each packet is compared to the criteria of the access list and will either be pe… I hope this has been helpful! Laz the first sent is matching specific access lists. In particular, the `match-any` keyword is being used. When multiple match criteria exist, match statements take place using a logical OR function. A packet must match any of the match statements within the stated ACLs to be accepted. --- _[View the full topic](https://forum.networklessons.com/t/qos-llq-low-latency-queueing-on-cisco-ios/1817)._