Troubleshooting
Diagnostic Flowcharts
Flowchart 6: Network Level Loopback Test
Figure
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 | 75 |