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Troubleshooting flowchart
Figure 8 Troubleshooting Layer 3 forwarding failure
Solution
To resolve the issue:
1.
Verify that the port is not faulty (due to hardware or configuration issues).
If the port is faulty, follow the solution in "
" to troubleshoot the issue.
2.
Verify that ARP entries are correct:
a.
Execute the
display arp
command to verify that ARP entries are correct.
−
If incorrect ARP entries exist, execute the
debugging arp packet
command to locate
the issue.
−
If the switch learns no ARP entries, you can execute the
arp static
command to
configure static ARP entries.
b.
Execute the
display mac-address
command to verify that the output interfaces in the MAC
address entries and ARP entries are the same by using the
display mac-address
command.
If the output interfaces are not the same, execute the
reset
command to clear the ARP
entries. Then the switch can learn ARP entries again.
3.
Verify that route entries are correct:
a.
Execute the
display ip routing-table
command to verify that route entries are correct.
If incorrect route entries exist, troubleshoot the protocol that learns the route entries.
b.
Execute the
display fib
command to verify that the output interfaces in the FIB entries and
route entries are the same.
If the output interfaces are not the same, execute the
reset
command to clear the route
entries. Then the switch can learn route entries again.
4.
If the issue persists, contact H3C Support.
