HP 5500 SI Troubleshooting Manual page 20

Input:
5 CRC, 0 frame, - overruns, 0 aborts
b. If the statistics are not zero, the following failures might occur:
Interface hardware failure—To test such a failure, connect the cable that is connected to the
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local port to a correctly operating port (for example, Port A) that has the same
configurations as the local port. If Port A forwards traffic correctly, you can determine that
the hardware of the local port fails. In this event, you must replace the local port with a
correctly operating port.
− Transceiver module, fiber, or twisted pair failure—To test and solve such a failure, replace
the faulty transceiver module, fiber, or twisted pair with a good one.
Inconsistent configurations—Verify that the configurations (such as speed and duplex mode)
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of the peer are consistent with the local port. If they are inconsistent, modify the
configurations of the local port.
c. If the problem persists, contact HP Support.
2. Verify that packets are not mistakenly filtered out by ACLs:
a. Examine the ACL and QoS policy configuration for packet filtering on the port, on the VLAN of
the port, or globally. If packets are mistakenly filtered out, modify the ACL or QoS policy
configuration.
− To display the ACL configuration on the port for packet filtering, execute the display
packet-filter command.
To display the QoS policy configuration on the port, execute the display qos policy
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command.
To display the QoS policy configuration on the VLANs of the port, execute the display qos
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vlan-policy command.
To display the global QoS policy configuration, execute the display qos policy global
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command.
b. Determine whether packets are filtered out by automatically created ACLs.
The following features automatically create ACLs:
IP source guard—Configured by using the ip source binding or ip verify source command.
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To display source guard binding entries, execute the display ip source binding or display
ipv6 source binding command. If IP source guard is configured but the packets do not match
any entries, further troubleshoot the problem based on the way the binding entries are
created.
Portal authentication—When portal authentication is configured, the port discards the
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packets of unauthenticated users. To display the portal configuration of the port or the
VLANs of the port, execute the display portal interface command. To cancel the portal
configuration on the port, execute the undo portal command in Layer 2 Ethernet interface
view. To cancel the portal configuration on the VLAN of the port, execute the undo portal
server server-name command on the corresponding VLAN interface.
EAD fast deployment—When EAD fast deployment is enabled, the port discards packets of
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unauthenticated users except when the users access only a free IP. To display whether EAD
fast deployment is enabled on the port, execute the display dot1x command.
3. Verify that the port is not blocked:
0 unicasts, 50 broadcasts, 2 multicasts, 0 pauses
5 input errors, 0 runts, 0 giants, 0 throttles
- ignored, - parity errors
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