en_TSHOOT_v6_Ch02.pptx

8/17/2019 en_TSHOOT_v6_Ch02.pptx

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© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Course v Ch!"ter #1

Ch!"ter 2$

%roubleshooting Processes &orCom"le' (nter"rise )et*or+s

CCNP TSHOOT: Maintaining and Troubleshooting IP Networks


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Ch!"ter #2© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Chapter 2 Objecties

Identi&y troubleshooting "rinci"les !nd ev!lu!te

troubleshooting methodologies.

Pl!n !nd im"lement troubleshooting "rocedures !s "!rt o& !

structured troubleshooting methodology.

Pl!n !nd im"lement troubleshooting !nd net*or+

m!inten!nce "rocedures to e&&ectively su""ort e!ch other.


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Ch!"ter #© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Troubleshooting Methodologies

-lo* ch!rt o& ! structured troubleshooting !""ro!ch


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Troubleshooting Methodologies

Shoot &rom the hi" vs. structured troubleshooting method


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Ch!"ter #/© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Troubleshooting !pproaches

Top"down

#otto$"up

%iide and con&uer

'ollow"the"path

Spot the di((erences

Moe the proble$


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Troubleshooting !pproaches " Spot the %i((erences )*a$ple

r!nch1 is in good *or+ing order

r!nch2 h!s connectivity "roblems

Branch2# show ip route

10.0.0.0/24 is subnetted, 1 subnets

C 10.132.126.0 is direct! connected, "astthernet4

C 1$2.16%.3&.0/24 is direct! connected, B'(1

Branch1# show ip route

10.0.0.0/24 is subnetted, 1 subnets

C 10.132.12).0 is direct! connected, "astthernet4

C 1$2.16%.36.0/24 is direct! connected, B'(1*+ 0.0.0.0/0 2)4/0- ia 10.132.12).1


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7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Troubleshooting !pproaches " Moe the Proble$ )*a$ple

!"to" is h!ving net*or+ "roblems. C!ble or "ort s*!""ing c!n hel"

isol!te the "roblem.


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© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

I$ple$enting Troubleshooting Procedures

3e&ining the "roblem

4!thering in&orm!tion

An!ly5ing the in&orm!tion

(limin!ting "ossible "roblem c!uses

-ormul!ting ! hy"othesis !bout the li+ely c!use o& the"roblem

%esting th!t hy"othesis

Solving the "roblem


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The Troubleshooting Process + ,eri(- and %e(ine the Proble$


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The Troubleshooting Process + .ather In(or$ation


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The Troubleshooting Process + !nal-/e


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The Troubleshooting Process + )li$inate


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The Troubleshooting Process + Propose H-pothesis


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The Troubleshooting Process + Test H-pothesis


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Ch!"ter #1/© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

The Troubleshooting Process + Sole Proble$


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The Troubleshooting and Network Maintenance


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The Troubleshooting and Network Maintenance + Cont0

Accur!te document!tion is critic!l to e&&ective

troubleshooting.

A net*or+ b!seline is essenti!l !nd c!n include$

Inter&!ce lo!d &or critic!l net*or+ lin+s 8I9S:

CP; lo!d !nd memory us!ge o& routers !nd s*itches 8S)


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Co$$unication and Change Control

Communic!tion "l!ys ! role in !ll "h!ses o& structured troubleshooting.


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Co$$unication and Change Control + Cont0

Ch!nge control is ! &und!ment!l "rocess in net*or+ m!inten!nce.

Controls *hen ch!nges !re m!de, !uthori5!tion re>uired !nd *h!t

!ctions !re t!+en.

C!n reduce un"l!nned out!ges !nd incre!se net*or+ u"time.

%he ch!nge control "rocess$

Im"lement the ch!nge ?eri&y th!t it !chieved the desired results

=oll b!c+ i& necess!ry

!c+ u" the ch!nged con&igur!tions or so&t*!re

3ocument@communic!te your ch!nges


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%isaster 1ecoer- Tools

Success&ul dis!ster recovery is de"endent on the e'istence

o& the &ollo*ing$

;" to d!te con&igur!tion b!c+u"s

;" to d!te so&t*!re b!c+u"s

;" to d!te h!rd*!re inventories !nd document!tion

Con&igur!tion !nd so&t*!re "rovisioning tools


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Chapter 2 Su$$ar-

%he &und!ment!l elements o& ! troubleshooting "rocess$

4!thering o& in&orm!tion !nd sym"toms

An!ly5ing in&orm!tion

(limin!ting "ossible c!uses

-ormul!ting ! hy"othesis

%esting the hy"othesis

Some commonly used troubleshooting !""ro!ches !re$

%o"do*n

ottomu"

3ivide!ndcon>uer

-ollo*the"!th

S"ot the di&&erences


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Chapter 2 Su$$ar- + Cont0

;se&ul d!t! to g!ther !nd cre!te ! net*or+ b!seline !re$

!sic "er&orm!nce st!tistics using sho* comm!nds

Accounting o& net*or+ tr!&&ic using =


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There are no labs (or this chapter0

Chapter 2 abs


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Ch!"ter #

Documents

en_TSHOOT_v6_Ch02.pptx