Troubleshooting 10/100Base-TX/9000

Diagnostic Flowcharts

Flowchart 6: Network Level Loopback Test

Figure 4-8

6

A

Host entry

no

B Remote

yes

 

 

in ARP

 

host up

1

 

cache

 

?

 

 

?

 

 

 

 

 

 

 

yes

 

no

 

 

 

 

 

 

 

 

C

 

 

 

 

Bring up

 

 

 

 

remote host

1

D

 

no

E

 

Entry

Use arp to

 

 

complete

 

complete entry

 

 

?

 

 

 

 

yes

 

 

 

F

 

 

 

 

 

ping local host

 

 

 

1

Chapter 4

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