NEC IP8800/S2400 Series Troubleshooting Manual page 115

(6) Checking unicast routing information
Check the route information acquired by this system if communication is not possible even when the address resolution
with the neighboring system is achieved, or if communication is disabled in the midway to the other party during IPv4
unicast communication, or if the route to the other party is abnormal. Use the following procedure:
1. Log in to the system.
2. Execute the show ip route command to check the route information acquired by this system.
3. For IP8800/S6700, IP8800/S6600, and IP8800/S6300, check to see if packets are discarded because of the Null
interface. If the route information sending interface resulting a communication failure is null0, packets are discarded
because of the Null interface. Review the setting conditions for the static routing function in the configuration.
4. Go to "3.7 IPv4 Unicast Routing Communication
in the route information acquired by this system or if the next hop address is invalid.
5. If the route information acquired by this system contains the route information on the failed interface, the following
functions set for the interface may have problem. Check these functions.
• DHCP/BOOTP function
Go to "(7)Checking DHCP/BOOTP setting
• Filtering/QoS function
Go to "(8)Checking filtering/QoS setting
(7) Checking DHCP/BOOTP setting information
When the relay function or the server function of DHCP/BOOTP on this system provides IP addresses to the
neighboring system, there is possibility that IP addresses are not correctly assigned to the neighboring system.
Check to see the settings of the relay function or the server function. For the procedure, see
QoS Setting Information
."
(8) Checking filtering/QoS setting information
Certain packets may have been discarded by filtering, or packets may have been discarded through bandwidth
monitoring, discarding control, or shaper of the QoS control. Review if the conditions of filtering and QoS control in
the configuration have been set up correctly and if bandwidth monitoring, discarding control, or shaper has been set up
appropriately for system operation. For the procedure, see
(9) Checking option license OP-NPAR [OP-NPAR]
If no information is displayed by the show ip interface command though the interface is set to VRF interface
and configured, there is possibility that option license OP-NPAR is unregistered or invalid. Check the status of option
license on this system by using the show license command.
1. Log in to the system.
2. Check to see the license software and the enabled options by using the show license command.
3. If OP-NPAR does not appear in the license software, it indicates any license key for OP-NPAR has not been
registered yet. Register the license key for OP-NPAR.
4. When OP-NAPR is displayed in license software but it is not displayed as an enabled option, the hardware
configuration of this system might not support OP-NPAR. Review the hardware configuration. For more information
about the hardware configuration, see the manual "Configuration Settings, Vol. 1."
5. When this system hardware configuration supports OP-NPAR but the OP-NPAR is not displayed as an enabled
option, use the reload command to restart the system, which will enable the option license.
6. When OP-NPAR appears as an enabled option, see step 4 or later in
3.
Troubleshooting Functional Failures in Operation
Failure" if the route information on the failed interface is missing
information."
information."
3.23.1 Checking Filtering/QoS Setting Information
"
(2)Checking interface status
"
3.23.1 Checking Filtering/
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