Assessments - 4, GPA: 3.8 ( )

Fabricante : NEC Arquivo Tamanho: 1.52 mb Arquivo Nome : Língua de Ensino:

3. If the statistical information identified in step 2 is incremented, packets are discarded through discarding control and shaper of QoS control. 4. Review to see if discard control and shaper have been set up appropriately for the system operation. IP8800/S6700, IP8800/S6600, and IP8800/S6300 1. Log in to the system. 2. Specify port list in the show shaper command and check the "discard_pkt" statistical information on user queue of the input and output interfaces used for communication. 3. Specify interfaces in the show qos queuing command and check the "discard_pkt" statistical information on the port transmission/reception queue of the input and output interfaces used for communication. 4. Specify interfaces in the show qos queuing command and check the "discard_pkt" statistical information on the distribution transmission/reception queue of the input and output interfaces used for communication. 5. If the statistical information identified in step 2 to 4 is incremented, packets are discarded through discarding control of QoS control. 6. Review to see if discard control and shaper have been set up appropriately for the system operation. 4 Troubleshooting Communication Failures Due to Resource Shortage [IP8800/S6700] [IP8800/S6600] [IP8800/S6300] 4.1 MAC Address Table Resource Shortage 4.2 When Resource Shortage of VLAN Identification Table Occurs 4.3 When Resource Shortage Occurs in Shared Memory 4. Troubleshooting Communication Failures Due to Resource Shortage [IP8800/S6700] [IP8800/S6600] [IP8800/S6300] 4.1 MAC Address Table Resource Shortage 4.1.1 Checking Resource Usage of MAC Address Table This system outputs operation log messages when the MAC address table usage reaches 80% and 100% of the accommodating condition. The operation log message output is shown in the table below. Table 4-1: Operation Log Message for Checking Resource Usage No. Trigger Log Message 1 When MAC address table usage reaches 80% MAC address table entries was beyond 80 percent of capacity. 2 When MAC address table usage reaches 100% MAC address table entries exceeded capacity. Communication is not immediately affected when usage reaches 80%. However, if usage of MAC address table continuously increases, the limit accommodating condition may be reached and resource shortage resulting in disabled MAC address learning may arise. Check the set value and accommodation value in advance so that the limit of the accommodating condition will not be exceeded. The MAC address table usage can be checked using the show system command (for details, see the manual "Operation Commands"). 4.1.2 Action to Be Taken When MAC Address Table Resource Shortage Occurs When usage of MAC address table reaches the limit of the accommodating condition, the corresponding log message is output at the timing listed in the table below. Table 4-2: Operation Log Message for Checking Resource Use Status No. Trigger Log Message 1 MAC address learning ARP/NDP learning MAC address table entries exceeded capacity. 2 Static ARP/NDP registration MAC address table entries exceeded capacity. 3 Static MAC address registration The static MAC address entry can't be registered at MAC address table. ( VLAN ,mac )* 4 Setting MAC address learning suppression function The "no mac-address-table learning" entry can't be registered at MAC address table. ( VLAN )* 5 IEEE802.1X authentication (port authentication, VLAN authentication (static)) The 802.1X Supplicant MAC address can't be registered athardware tables.* Note: This log is displayed when the show dot1x loggingcommand is executed. 6 Ring Protocol enabled Additional Ring Protocol registration AXRP : The MAC address entry can't be registered athardware tables. 7 IGMP Snooping registration IGMP snooping: The number of the IGMP snooping entry exceeded the capacity of this system. 8 MLD Snooping registration MLD snooping: The number of the MLD snooping entry exceeded the capacity of this system. 4. Troubleshooting Communication Failures Due to Resource Shortage [IP8800/S6700] [IP8800/S6600] [IP8800/S6300] No. Trigger Log Message 9 Web authentication (Static VLAN mode) The login failed because of hardware restriction. Note: This log is displayed when the show web-authentication logging command is executed. 10 MAC authentication The login failed because of hardware restriction. Note: This log is displayed when the show mac-authentication logging command is executed. * The log message of No. 1 may be output at the same time. If these log messages are output, the function that newly uses the MAC address table cannot be set. Review the network configuration and set the configuration allowing for operation below the limit of the system's accommodating condition. No. 2, 3, 4 and 6 in the above table shows that setting cannot be registered to the MAC address table by the configuration command. No. 5 shows that setting cannot be registered to the MAC address table of the authenticated terminal (authentication ...

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