NetFlow Analyzer: QoS a cost saver in downfall

Implementing a WAN optimization engine or packet shaper to optimize the bandwidth usage is considered as a costliest solution during this downfall.

Due to slowdown in the economy and the drop in GDP, every organization is reconsidering its spending on IT infrastructure management. In this tough economic situation, the motive of the Network Administrator should be optimizing the current infrastructure for future accommodation of resources without involving additional cost.

Network Administrator managing distributed network face huge problem when it comes identifying Non-Business traffic utilization over business critical traffic.

Lets consider a scenario in which a Network Administrator is managing a distributed network and users accessing the DB server located in Site office from HQ is very slow and sometimes the updates not getting reflected.

Deploying WAN optimizing solution or packet shaper to shape or optimize this business critical traffic invloves lot of time and money. Network Administrator is given a task of identifying cause and optimize the bandiwidth with existing resource so that business critical traffic is given a prioritization.

Network Administrator was already using NetFlow Analyzer to monitor the traffic on HQ router and Site office router. He identifies that unwanted application like (Http, file sharing) application consume more bandwidth compared to the business critical application like (DB traffic, FTP, Mail).

QoS Implementation:

He consider implementing QoS policy to shape the business cirtical applications.

class-map match-any database

match ip dscp cs5

match ip precedence 4

match ip precedence 3

class-map match-any FTP

match ip dscp CS3

match ip precedence 5

class-map match-any mail

match ip dscp CS2

match ip precedence 2

policy-map QOS-Policy

class database

priority percent 60

class FTP

priority percent 20

class mail

priority percent 10

class class-default

fair-queue

random-detect

interface Serial0/0/0

service-policy output QOS-Policy

After setting up the QoS policing on the interface, the Administrator observes that traffic of business critical application has been smoothly shaped.