Troubleshooting

Question 1

What is the bottom up approach?

Answer 1

Start at the physical layer and move up

Question 2

Important statistics from show interface command for troubleshooting connectivity

Answer 2

input queue drops
output queue drops
input errors
output errors

Question 3

what errors indicate a duplex mismatch?

Answer 3

CRC errors and output errors

Question 4

Cisco suggested troubleshooting flow

Answer 4

is it physical?
is the path correct or desired (routing)?
is the default gateway correct?
is the name resolution correct?
is an acl blocking traffic?