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QoS - Coggle Diagram
QoS
Terms
CoS (Class of Service)
Layer 2 (Ethernet Frames)
3 bits
DSCP (Differenciated Services Code Point)
6bits
3bits Class Selector (same bits as IPP)
ToS (Type of Service)
8bits; 3 used for IPP
TID
Like CoS for Wireless
Trust boundary
IPP (IP Precedence)
PHB (Per Hop Behavior)
Tools
Congestion Avoidance
Tail Drop
WRED
RED
Not supported by Cisco devices
Policing, Shaping and Re-marking
Policers
Drop
Re-Mark
Shapers
Congestion Mgmt or Scheduling tools
Queuing
LLQ
CBWFQ
(Class Based Weighted Fair Queuing)
Only activated in case of congestion
Older Methods
FIFO
PQ
Causes starvation
CQ
16 queues with round robin
WFQ
Scheduling
Strict Priority
Round Robin
Weighted Fair
Classification and marking
Tools
Markings
Addresses
Application Signatures
aka Deep Packet Inspection
NBAR Advanced Classification
(sometimes called Application Visibility Control)
Active Mode
Passive Mode
Link-Specific Tools
MQC
(Modular QoS CLI)
1 - Define classes of traffic
Class Map
class-map
2- Define QoS policies for classes
Policy Map
policy-map
3- Apply a service policy
Service Map
service-policy