IP QoS training
course contents
What is QoS
QoS and CoS, throwing bandwidth at the problem, Best effort
services, Differentiated services, Integrated services, guarantees,
the need for QoS, IETF working groups.
Application issues
Video, Voice, other applications, Jitter, delay, packet loss.
Flows, per flow and per aggregate QoS, Stateful vs. stateless
QoS, applications vs. network QoS.
“Traditional” IP QoS
The TOS field and precedence, the obsolete OSPF use of the
TOS field, TCP congestion avoidance.
Queuing
Where to use queuing, FIFO, Priority queuing, Custom queuing,
Weighted Fair Queuing, CBWFQ, PQWFQ, LLQ, RED and WRED.
DiffServ
Architecture, DSCP, CU, packet classification and marking,
meters and conditioners, Bandwidth brokers and COPS, Per
Hop Behaviours, best effort PHB, Assured Forwarding PHB,
Expedited forwarding PHB, Network Based Application Recognition
(NBAR).
Layer 2 issues
Fragmentation and interleaving, compression (codecs, MPEG
formats, header compression…), 802.1p, Subnet bandwidth
management, Bandwidth allocators and requestor modules,
the use of MPLS, traffic engineering, traffic shaping.
RSVP
What is RSVP? architectures, paths, path messages, reservations,
traffic specifications, tear downs, guaranteed and controlled
load, token buckets, Call Admission Control in voice networks,
gatekeepers.
Other issues
Policy based routing, the Resource Allocation Protocol, QoS
management tools, baselining networks, design issues, QoS
in IPv6, QoS and multicasts.
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