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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 the ARP entries are correct:
a.
Execute the
display arp
command to verify that the ARP entries are correct.
If incorrect ARP entries exist, execute the
debugging arp packet
command to locate the
issue. For the APR entries that are still not learned, execute the
arp static
command to
configure static ARP entries.
b.
Execute the
display mac-address
command to verify that the output interface of the
gateway in the MAC address entries and ARP entries are the same.
If the output interfaces are not the same, execute the
reset arp
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.
Related commands
This section lists the commands that you might use for troubleshooting Layer 3 forwarding failure.
Command
Description
debugging arp packet
Enables ARP packet debugging.
display arp
Displays ARP entries.
display ip routing-table
Displays information about the routing table.
display mac-address
Display MAC address entries
display fib
Display FIB entries
Protocol flapping
Symptom
The switch cannot send or receive protocol packets.