Cost–effectiveness is the common term that we are hearing or seeing nowadays and this exists in all forms on the globe, In this tough economic situation the motive of Network Administrator should be optimizing the current infrastructure for future accommodation.
Optimization plays a major role when it comes to distributed network architecture or MPLS network. Most of the complaints from users at each location , Application usage is very slow at business hours, Ofcourse the possible reason might be due to other unwanted traffic consuming large amount of bandwidth over the business critical application.
We will have scenario based explanation to elaborate this problem of Network Administrator:
Scenario:-
Network Administrator is already using ManageEngine NetFlow Analyzer on the network to monitor the traffic utilization in Head Quarters(HQ) and Site office, users accessing the Database servers from the HQ raised an issue that database application response is very slow and sometimes the updates not getting reflected.
Network Administrator found using NetFlow Analyzer that other unwanted application like (Http, file sharing) application consume more bandwidth compared to the business critical application like (DB traffic, FTP, Mail).
Implementing QoS policy:-
Network Administrator has various solutions to solve the problem:
1. Increasing the Bandwidth on Pipe
2. Deploying WAN accelerator
3. QoS policing
The first two solutions are more expensive and any management will think over spending extra money in tough situation. QoS policing is the best and cost effective solution and Network Administrator is also advised to do the same. He sets policy on HQ WAN router as follows:
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.
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Praveen Kumar
NetFlow Analyzer Technical Team
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