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Applying Methodology to a Design Part 2 — Transcript

by Santelmo · 1,735 words · 394 segments · language en · Watch on YouTube

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0:04network design methodology
0:06this is the second segment of applying
0:09methodology to a design
0:13the network design methodology presented
0:15in this section is derived from the
0:17ciscos repair plan design
0:21implement operate and optimize
0:24or the ppdio methodology which reflects
0:28a network's
0:29life cycle so the following sections
0:32describe the ppgio phases and their
0:35relation to the network design
0:36methodology
0:38and the benefits of a life cycle
0:40approach to network design
0:43subsequent section explains the design
0:46methodology in detail
0:51the ppdio network life cycle approach
0:55so design as an integral part of the
0:57ppdio methodology
1:01the ppdio network lifecycle as
1:03illustrated here
1:06reflects the basis of a standard
1:08network's lifecycle
1:10so as shown the ppd io lifecycle paces
1:14are separate
1:15yet closely related let's start with the
1:18first phase
1:20prepare page the prepare pace
1:23involves establishing the organizational
1:26business requirements
1:28developing a network strategy
1:32and proposing a high-level conceptual
1:34architecture
1:35identifying technologies that can help
1:38support
1:39the architecture financial justification
1:42of the network strategy is established
1:46by assessing the business case for the
1:48proposed architecture
1:51the next one would be plant base
1:54this space involves identifying the
1:57network requirements
1:59which are based on the goals of the
2:01network
2:02where the network will be installed who
2:04will require
2:05which network services and so forth
2:09so the plan base also involves assessing
2:12the sites
2:13where the network will be installed and
2:15any existing networks
2:17and performing a gap analysis to
2:19determine if the existing network
2:21infrastructure
2:23sites and operational environment can
2:25support
2:26the proposed system so a project
2:29plan helps manage the tasks
2:32responsibilities
2:34critical milestones and resources
2:37required
2:38to implement the changes in the network
2:40so the project plan
2:42should align with the scope cost
2:46and resource parameters established
2:49in the original business requirements so
2:52the output of this space is a set of
2:55network requirements okay
2:58so the third piece would be design pace
3:02okay or designing the solutions the
3:06initial requirements determined in the
3:08plan
3:08phase drive the network design
3:10specialists activities
3:12these specialists design the network
3:15according to these initial requirements
3:18incorporating any additional data
3:20gathered
3:22during the network analysis and network
3:24audit
3:25so when upgrading an existing network
3:27and
3:28through discussion with managers and
3:30network users
3:33so the network design specification that
3:35is produced
3:36is a comprehensive detailed design that
3:39meets current
3:40business and technical requirements and
3:43incorporates specifications to support
3:46availability reliability security
3:50scalability and performance so this
3:54design specification provides the basis
3:56for implementation
3:58activities so next would be
4:02the implement phase so implement the
4:04solution
4:06integrate without disruption or causing
4:09vulnerability okay now in the
4:13implement pace implementation and
4:16verification begins
4:17after the design has been approved so
4:20the network
4:21and any additional components are built
4:24according to the design specifications
4:26with the goal of integrating devices
4:29without disrupting
4:31the existing network or creating points
4:33of vulnerability
4:36so the next one would be the operate
4:38pace
4:40okay so maintain network health
4:43manage resolve prepare
4:46and replace now the operation is the
4:50final test
4:51to the science appropriateness
4:55so the operate phase involves
4:58maintaining network health through
5:00day-to-day operations
5:02which might include
5:06reducing expenses so the fault detection
5:09and correction
5:10and performance monitoring that occur in
5:13daily operations
5:14provide initial data for the initial
5:18uh considerations on the network
5:21lifecycle
5:22optimized race the last one would be
5:26the optimized space so operational
5:29excellence
5:30adapt to changing business requirements
5:34so the optimized space is based on
5:36proactive
5:38network management the goal of which is
5:40to identify
5:41and resolve issues before real problem
5:44arises
5:46and organization is affected so reactive
5:50fault detection and correction
5:52troubleshooting
5:53are necessary when proactive management
5:56cannot predict
5:57and mitigate the failures so in the
5:59ppdio
6:01process the optimized space might lead
6:04to network redesign
6:05if too many network problems or errors
6:08arises
6:09so if performance does not meet
6:12expectations
6:13or if new applications are identified
6:17to support organizational and technical
6:20requirements
6:23so although design is one of the six
6:26ppdio
6:27bases all the other pages influence
6:31design decisions
6:32and the design phase interacts closely
6:36with them as follows
6:37okay the requirements derived
6:41from the prepare and plan phases
6:44are the basis of the network design
6:46right
6:47now the implement includes the initial
6:51verification of the design
6:53on the actual network now during the
6:56operation and optimize the final
6:59decision is made about the
7:00appropriateness of the design
7:03based on the network analysis and any
7:06problems that
7:07arise so the network might have to be
7:10redesigned
7:11to correct any discovered errors
7:17now what are the benefits of the
7:19lifecycle approach to network design
7:22okay now the network lifecycle approach
7:25provides many benefits including the
7:28following
7:29so lowering the total cost of ownership
7:33identifying and validating technology
7:36requirements
7:38planning for infrastructure changes and
7:40resource requirements
7:42developing a sound network design
7:44aligned with technical requirements
7:47and business goals accelerating
7:50successful implementation improving the
7:53efficiency of the network
7:54and of the staff supporting it and
7:57reducing
7:58operating expenses okay
8:02so the next uh advantages
8:05okay or benefits would be the increasing
8:09network availability
8:11so assessing the state of the network
8:13security and its ability to support
8:16the proposed design so specifying the
8:18correct set of hardware and software
8:20releases
8:21and keeping them operational and current
8:24producing a sound operational design and
8:27validating network
8:29operations also
8:32staging and testing the proposed system
8:35before deployment
8:36is amassed all right improving
8:40staff skills okay so you have to train
8:43your staff
8:44proactively monitoring the system and
8:47assessing
8:49availability trends and alerts okay and
8:52proactively identifying security
8:55okay or security breaches and defining
8:58remediation plans
9:00all right next would be improving
9:03business agility okay
9:06so establishing business requirements
9:08and technology strategies
9:11readying sites to support the system
9:14to be implemented integrating technical
9:18requirements and business goals into a
9:20detailed design
9:22and demonstrating that the network is
9:24functioning as
9:25specified so expertly installing
9:29configuring and integrating system
9:30components
9:31and continually enhancing performance
9:36so the last benefit would be
9:38accelerating access to applications and
9:41services
9:42okay so this includes assessing and
9:45improving operational preparedness
9:48to support current and planned network
9:50technologies
9:52improving service delivery efficiency
9:55and
9:55effectiveness by increasing availability
9:58resource capacity and performance
10:02improving the availability reliability
10:04and stability of the network
10:07and the applications running and
10:10managing and resolving issues okay
10:17so ppd io network lifecycle approach
10:20design methodology so when working in an
10:24environment that requires creative
10:25production
10:26on a tight schedule for example when
10:29designing a network or internet work
10:31using a methodology can be helpful just
10:34like
10:35in preparing or doing
10:38software development so we also use
10:40methodology on that
10:42okay so same thing on the network design
10:44a methodology
10:46is a documented systematic
10:49way of doing something so following a
10:52design methodology can have
10:54many advantages so first
10:57it ensures that no step is missed
11:00when the process is followed
11:04it also provides a framework for the
11:07design process
11:08deliverables it encourages consistency
11:12in the creative process enabling network
11:15designers
11:16to set appropriate deadlines and
11:18maintain customer and manager
11:20satisfaction
11:22another thing would be it allows
11:24customers and
11:25managers to validate that the designers
11:28have thought
11:29about how to meet these requirements
11:33so the design methodology presented here
11:35includes three basic steps
11:38some of the design methodology steps are
11:40intrinsic
11:41to the ppg io design phase whereas
11:45other steps are related to ppgio paces
11:50so these are the three steps in the
11:53design methodology
11:55so first is identify customer
11:57requirements
11:59this is very important just like in
12:01software development
12:02so the first thing to do is to identify
12:05the functional requirements
12:06or the customer requirements so also in
12:10the network design
12:11it has to be considered so in this step
12:15which is typically completed during the
12:17ppgio prepare phase
12:20key decision makers identify the initial
12:22requirements
12:24so based on these requirements a high
12:26level conceptual architecture
12:28is proposed so you have also
12:31deliverables
12:32for each of these presets or steps here
12:36so the next one would be characterizing
12:38the existing network and sites
12:40so the plant phase involves
12:42characterizing sites
12:44and assessing any existing networks and
12:47performing
12:48a gap analysis to determine whether the
12:51existing system infrastructure
12:54sites and operational environment can
12:56support the proposed system
12:59so characterization of the existing
13:01network and sites
13:02includes site and network audit
13:05and network analysis so during the
13:08network audit
13:10the existing network is totally checked
13:12for integrity
13:13and quality during the network analysis
13:18network behavior like traffic congestion
13:21and software is analyzed
13:25okay last one would be design the
13:28topology and network solutions
13:30so in this step the detailed design of
13:33the network is created
13:35decisions are made about network
13:37infrastructure
13:38infrastructure services and applications
13:42the data for making this decision is
13:45gathered during the first two steps
13:48a pilot or prototype network might be
13:51constructed
13:52to verify the correctness of the plan
13:55and to identify and correct
13:57any problems as a proof of concept
13:59before
14:00implementing the entire network so a
14:03detailed design
14:04document is also written during this
14:07step
14:08it includes information that has been
14:11documented
14:12in the previous step
14:16when the design methodology is complete
14:21the design implementation process is
14:24executed
14:25this process includes the following
14:28steps here
14:29so first plan the implementation
14:32so during this step the implementation
14:35procedures are prepared in advance
14:37to expedite and clarify the actual
14:39implementation
14:41cost assessment is also undertaken at
14:43this time
14:44so if you still remember cost assessment
14:47is
14:48part also of the building black approach
14:51so whatever methodology you use
14:54so they have these similarities okay
14:57so this step is performed during the
15:00ppdio design phase
15:04step 2 implement and verify the design
15:08so the actual implementation and
15:09verification of the design
15:11take place during this step by building
15:15a network
15:16so this step maps directly
15:19to the implement phase of the ppdio
15:22methodology
15:23so take note that a pilot or prototype
15:26network verifies the design
15:28somewhat somewhere okay however
15:31the design is not truly verified until
15:34it is actually implemented
15:37and then step 3 monitor and
15:40optionally redesign so the network is
15:43put into operation after it is built
15:46so during operation the network is
15:49constantly monitored
15:51and checked for errors so if
15:53troubleshooting problems become
15:55too frequent or even impossible to
15:58manage
15:59a network redesign might be required
16:02so this can be avoided if all the
16:04previous steps
16:06have been completed properly so this
16:09step in fact
16:10a part of the operate and optimized
16:12spaces
16:13of the ppdio methodology

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